The mass of the excess reactant that remains is 0 g.
To solve the question, first, we need to balance the chemical equation:Al2S3 + 6H2O → 2Al(OH)3 + 3H2SThe balanced chemical equation for the given reaction is:Al2S3 + 6H2O → 2Al(OH)3 + 3H2SFrom the balanced chemical equation, we can see that the stoichiometric ratio of Al2S3: H2O is 1:6. Hence, the mole of H2O required = 316/6 = 52.67 g we know that 493.0 g of water is present, which is greater than the required amount of water.
As we have already balanced the chemical equation,Al2S3 + 6H2O → 2Al(OH)3 + 3H2SFrom the above equation, the stoichiometric ratio of Al2S3: H2O is 1:6.Hence, the mole of H2O required = 316/6 = 52.67 g Now, from the given question, we know that 493.0 g of water is present, which is greater than the required amount of water. Therefore, H2O is in excess and Al2S3 is the limiting reagent. Now, we have to find out the mass of the excess reactant that remains.
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Answer the following Critical Thinking Question. Explain your
answers.You may respond to the answers of the other students after
you have answered the question.
A schematic of the energy levels of a h
The transition that represents the smallest energy change would be from energy level 4 to energy level 3. This is because the energy levels are closer together as you move from higher to lower energies.
Based on the energy levels shown, a transition from energy level 2 to energy level 1 is not possible. This violates the principle that an electron cannot occupy energy levels lower than its ground state.
The transition from energy level 5 to energy level 2 represents the reddest wavelength. This is because the energy difference between these levels corresponds to a lower energy photon with a longer wavelength, which is perceived as red.
The transition from energy level 3 to energy level 1 represents the bluest wavelength. This is because the energy difference between these levels corresponds to a higher energy photon with a shorter wavelength, which is perceived as blue.
The transition from energy level 5 to energy level 1 results in a photon with the same energy as that absorbed originally. This corresponds to the electron returning to its original energy level, releasing a photon with the same energy as the absorbed photon.
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Your question is incomplete, but most probably your full questions was,
Answer the following Critical Thinking Question. Explain your answers.You may respond to the answers of the other students after you have answered the question.
A schematic of the energy levels of a hypothetical atom is shown below. An electron has been excited from energy level 1 to energy level 5 by absorbing a photon.
Which transition to lower energies represents the smallest energy change? _____Which transition, as shown, is not possible? _____Which of the transitions resulting in an emission line represents the reddest wavelength? _____Which of the transitions resulting in an emission line represents the bluest wavelength? _____Which of the transitions resulting in an emission line results in a photon with the same energy as that absorbed originally? _____meso compounds ___ have chiral centers and they ___ chiral. do; are do not; are not do not, are do; are not
Meso compounds do have chiral centers and they are not chiral. Meso compounds are achiral molecules that possess two or more stereogenic centers, one of which is a mirror image of the other.
They are not optically active and do not rotate polarized light, despite having chiral centers. They are basically internal mirror images of each other, with the same chemical and physical properties.
This makes it possible to separate and purify racemic mixtures, which consist of equal quantities of enantiomers. Because meso compounds are symmetric, their enantiomers have identical energy levels, which means that the energy required to convert one enantiomer into the other is the same as that required to break the symmetry.
Thus, meso compounds do not show optical activity and are considered optically inactive, despite the fact that they do contain chiral centers.
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what evidence suggests the acylation of aniline was successful?
The successful acylation of aniline can be confirmed by several key pieces of evidence, including the formation of a colored product, the disappearance of the characteristic amine smell, and the presence of specific spectroscopic signals.
When aniline undergoes acylation, it reacts with an acylating agent, such as acetyl chloride or acetic anhydride, to form a new compound. One of the primary indicators of a successful acylation reaction is the formation of a colored product. Aniline itself is colorless, but upon acylation, the resulting product often exhibits a distinct color. This color change can be observed visually and provides initial evidence of a successful reaction.
Additionally, the characteristic amine smell of aniline, which is often described as fishy or pungent, diminishes or disappears altogether after acylation. This olfactory change further supports the notion that the acylation reaction has taken place.
Furthermore, spectroscopic techniques can be employed to analyze the reaction mixture and provide more definitive evidence. Techniques like infrared spectroscopy (IR) and nuclear magnetic resonance (NMR) spectroscopy can reveal specific signals that correspond to the presence of the acylated product. These signals, such as shifts in absorption or chemical shifts, can be compared to known reference spectra to confirm the successful acylation of aniline.
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Balance the following redox reaction in an acidic solution
Cl-(aq)+MnO2(s)=Cl2(g)+Mn2+(aq)
The balanced redox reaction is Cl⁻ (aq) + 2MnO₂ (s) + 8H⁺(aq) → Cl₂ (g) + 2Mn²⁺ (aq) + 4H₂O(l).
The redox reaction can be balanced using the half-reaction method. Here are the steps to follow:
Separate the overall reaction into two half-reactions: oxidation and reduction. Cl⁻ (aq) → Cl₂ (g) oxidation
MnO₂ (s) → Mn²⁺ (aq) reduction
Balance the atoms that are undergoing a change in oxidation state. We can see that chlorine is going from -1 in the reactant to 0 in the product. Add one electron to the left side.
Cl⁻ (aq) → Cl₂ (g) + 2e⁻ oxidation
MnO₂ (s) → Mn²⁺ (aq) reduction
Balance the atoms that are not undergoing a change in oxidation state. There is only one manganese atom on both sides of the equation and they are already balanced.
Cl⁻ (aq) → Cl₂ (g) + 2e⁻ oxidation
MnO₂ (s) + 4H⁺(aq) + 2e⁻ → Mn²⁺ (aq) + 2H₂O(l) reduction
Multiply each half-reaction by a factor that makes the number of electrons equal in both half-reactions. by multiplying the first half-reaction by 2.
Cl⁻ (aq) + 2e⁻ → Cl₂ (g) oxidation2MnO₂ (s) + 8H⁺(aq) + 4e⁻ → 2Mn²⁺ (aq) + 4H₂O(l) reduction
Add the two half-reactions together and cancel out anything that is on both sides. This leaves us with the balanced redox reaction.
Therefore, Cl⁻ (aq) + 2MnO₂ (s) + 8H⁺(aq) → Cl₂ (g) + 2Mn²⁺ (aq) + 4H₂O(l) is The balanced redox reaction.
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how many microliters of 1.000 mnaoh solution must be added to 25.00 ml of a 0.1000 m solution of lactic acid ( ch3ch(oh)cooh or hc3h5o3 ) to produce a buffer with ph = 3.75?
First, we need to calculate equation the concentration of CH3CH(OH)COO- and HCH3CH(OH)COOH needed to produce a buffer solution at a given pH.
We will use the Henderson-Hasselbalch equation for this purpose. Henderson -Hasselbalch are equatio pH = pKa + log [CH3CH(OH)COO-] / [HCH3CH(OH)COOH]pH = 3.75 (given)pKa for lactic acid (HC3H5O3) =
We can assume that the volume of the resulting buffer solution is 25.00 ml (the same as the original volume of lactic acid), so we will add only a tiny amount of NaOH to it. The concentration of NaOH is given as 1.000 M.
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the spontaneous reaction below occurs in a voltaic cell. which of the following statements about this cell is true? [select all that apply]2 ag (aq) zn(s) → 2 ag(s) zn2 (aq)
The given spontaneous reaction occurs in a voltaic cell. In a voltaic cell, a spontaneous redox reaction is used to generate an electric current.
Electrons move through the wire from the anode to the cathode, and ions move from the anode to the cathode through the salt bridge. The following statements about the given cell are true:
1. Electrons flow from Zn(s) to Ag+(aq).
2. Zn is the anode and Ag is the cathode.
3. The oxidation of Zn(s) occurs at the anode.
4. The reduction of Ag+(aq) occurs at the cathode.
5. The potential difference across the cell is positive.
The given cell is a galvanic cell because the spontaneous reaction drives the flow of electrons, which allows work to be done. It is an electrochemical cell in which chemical energy is converted to electrical energy. Therefore, options 1, 2, 3, 4, and 5 are correct.
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balance the redox reaction by inserting the appropriate reaction:h^{ } cro_{4}^{2-} no_{2}^{-} -> cr^{3 } h_{2}o no_{3}^{-}h cro2−4 no−2⟶cr3 h2o no−3
The balanced redox reaction is : 2H^+ + CrO4^2- + 3NO2^- → Cr^3+ + H2O + 3NO3^-
To balance a redox reaction, we ensure that the number of atoms and charges on both sides of the equation are equal. A step by step of balancing this is as follows :
1. Separating the reaction into two half-reactions, one for oxidation and one for reduction:
Oxidation half-reaction: CrO4^2- → Cr^3+
Reduction half-reaction: 3NO2^- → 3NO3^-
2. Balancing the atoms in each half-reaction by adding water (H2O) molecules:
Oxidation half-reaction: CrO4^2- → Cr^3+ + 4H2O
Reduction half-reaction: 3NO2^- + H2O → 3NO3^- + 2H^+
3. Balancing the hydrogen (H) atoms by adding hydrogen ions (H^+):
Oxidation half-reaction: CrO4^2- + 8H^+ → Cr^3+ + 4H2O
Reduction half-reaction: 3NO2^- + H2O → 3NO3^- + 2H^+
4. Balancing the charges by adding electrons (e^-):
Oxidation half-reaction: CrO4^2- + 8H^+ + 3e^- → Cr^3+ + 4H2O
Reduction half-reaction: 3NO2^- + H2O → 3NO3^- + 2H^+ + 2e^-
5. Multiplying each half-reaction by the appropriate coefficient to equalize the number of electrons transferred:
Oxidation half-reaction: 3CrO4^2- + 24H^+ + 9e^- → 3Cr^3+ + 12H2O
Reduction half-reaction: 6NO2^- + 3H2O → 6NO3^- + 4H^+ + 4e^-
6. Combining the balanced half-reactions and cancel out the electrons:
3CrO4^2- + 24H^+ + 9e^- + 6NO2^- + 3H2O → 3Cr^3+ + 12H2O + 6NO3^- + 4H^+ + 4e^-
Simplifying the equation:
2H^+ + CrO4^2- + 3NO2^- → Cr^3+ + H2O + 3NO3^-
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write a balanced chemical reaction for the combustion of acetylene, c2h2
The balanced chemical reaction for the combustion of acetylene (C2H2) is:
2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O
In the combustion of acetylene, acetylene (C2H2) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). The balanced equation shows that 2 molecules of acetylene react with 5 molecules of oxygen to produce 4 molecules of carbon dioxide and 2 molecules of water.
The balancing of the equation is done by ensuring that the number of atoms of each element is the same on both sides of the equation. In this case, we have 4 carbon atoms, 6 hydrogen atoms, and 12 oxygen atoms on both sides of the equation, indicating that the equation is balanced.
The balanced chemical reaction for the combustion of acetylene is 2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O. This equation represents the stoichiometric relationship between the reactants (acetylene and oxygen) and the products (carbon dioxide and water) in the combustion process.
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draw the products formed from cis-3-hexene by sequences (1.) and (2.). hydroboration followed by oxidation with alkaline hydrogen peroxide. acid-catalyzed hydration.
When cis-3-hexene reacts through a sequence of hydroboration and oxidation with alkaline hydrogen peroxide, followed by acid-catalyzed hydration, the products formed Hydroboration.
Hydroboration followed by oxidation with alkaline hydrogen peroxide.1. First, hydroboration takes place, and the following compound is formed.2. After that, oxidation with alkaline hydrogen peroxide takes place, and the following product is obtained.
Acid-catalyzed hydration.3. Acid-catalyzed hydration results in the following product. Since cis-3-hexene is used in this reaction, the cis isomer of the product is formed. Thus, when cis-3-hexene reacts through a sequence of hydroboration and oxidation with alkaline hydrogen peroxide, followed by acid-catalyzed hydration.
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Write a balanced overall reaction from these unbalanced half reactions:
Cu ---------------> Cu^+2
Ag^+ -------------------> Ag
Please note: 2Ag ^+ + Cu ----------------> 2Ag + Cu^+2 is not the correct answer
Cu + 2Ag+ → Cu2+ + 2Ag The balanced chemical equation should be written as:Copper (Cu) reacts with Silver ions (Ag+) to form Copper ions (Cu2+) and silver (Ag).
The unbalanced chemical equations are:Cu → Cu2+Ag+ → AgStep 1: Balance the half-reaction for copper ions (Cu)Cu → Cu2+ + 2e-Step 2: Balance the half-reaction for silver ions (Ag+)Ag+ + e- → AgStep 3: Equate the number of electrons in both half-reactions.
The number of electrons in the two half reactions are not equal, therefore, they need to be balanced.Cu → Cu2+ + 2e-2Ag+ + 2e- → 2AgThe number of electrons is equal on both sides now.Step 4: Add the two balanced half reactions together and cancel out the electrons.Cu + 2Ag+ → Cu2+ + 2AgThis is the balanced overall reaction from the unbalanced half reactions. Therefore, the correct option is (Cu + 2Ag+ → Cu2+ + 2Ag).
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a solution has a ph of 5.4. write the formula you will use to calculate the [h ] and then show all your work leading to the determination of [h ].
a. The formula to calculate the [H⁺] of a solution has a ph of 5.4 is [H⁺] = [tex]10^{-pH}[/tex]
b. The determination of the [H⁺] is 2.51 × 10⁻⁶ mol/L.
a. The pH is defined as the negative logarithm of the hydrogen ion concentration (H⁺). Thus, the formula that can be used to calculate [H⁺] is [H⁺] = [tex]10^{-pH}[/tex].
b. To determine the [H⁺], we must apply the formula to calculate the [H⁺] of the given solution with a pH of 5.4.
[H₊] = [tex]10^{-pH}[/tex]
= [tex]10^{-5.4}[/tex]
= 2.51 × 10⁻⁶ mol/L
Therefore, the [H+] of the given solution with a pH of 5.4 is 2.51 × 10⁻⁶ mol/L.
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The [H+] of a solution with a pH of 5.4 is 2.5 × 10-6 M.
The pH scale is a measure of the acidity or basicity of a solution.
The pH of a solution can be used to calculate the hydrogen ion concentration, [H+], using the formula
pH = -log[H+].
To determine the [H+] of a solution with a pH of 5.4, the formula will be:
Hence, the formula for calculating the [H+] of a solution with a pH of 5.4 is
[H+] = 2.5 × 10-6 M.
To determine the [H+] of a solution with a pH of 5.4:
Step 1: Write the formula
pH = -log[H+]
Step 2: Rearrange the formula to isolate [H+]:
[H+] = 10-pH
Step 3: Plug in the given pH value:
pH = 5.4[H+]
= 10-5.4
Step 4: Solve for [H+] using a calculator:
[H+] = 2.5 × 10-6 M
Therefore, the [H+] of a solution with a pH of 5.4 is 2.5 × 10-6 M.
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How many atoms of hydrogen must be lined up to make a line 1 inch long. Hydrogen radius is 53 pm. (Convert pm to inches)
185186 atoms of hydrogen must be lined up to make a line 1 inch long.
The atomic radius of hydrogen is 53 picometers. The conversion of picometers to inches is needed to calculate how many atoms of hydrogen will line up to make a 1 inch long line. Conversion factor: 1 picometer = 3.937 x 10^-11 inch
53 picometers × (1 inch/ 2.54 cm) × (1 cm/ 10 mm) × (1 mm/ 10^6 nm) × (1 nm/ 10^3 Å) × (1 Å/ 10^-10 m) = 2.09 x 10^-9 inch
Substitute the given value of hydrogen atomic radius into the expression below:
1 in ÷ (53 pm) = 185186 atoms
Therefore, 185186 atoms of hydrogen must be lined up to make a line 1 inch long.
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be sure to answer all parts. the solubility of an ionic compound mx (molar mass = 497 g / mol) is 0.401 g / l. what is ksp for this compound? × 10 enter your answer in scientific notation.
ksp (solubility product constant) for this compound is 6.532 x 10⁻⁸
Ksp stands for the solubility product constant of a compound. It indicates the solubility of a substance in a solvent. It is calculated by multiplying the concentrations of the ions raised to their respective stoichiometric coefficients. This product is raised to a power equal to the number of ions in the compound.
The ionic compound Mx (with a molar mass of 497 g/mol) exhibits a solubility of 0.401 g per liter. Given that the molar mass of the compound is 497 g/mol.The solubility of Mx = 0.401 g/L = 0.401 g/dm³.
The molar mass of Mx = 497 g/mol, therefore, the number of moles of Mx present in 1 dm³ is given by:
mass/volume = 0.401/497 mol/dm³ = 0.000806 mol/dm³.
The compound Mx dissociates into x moles of M+ and x moles of X- ions. Then, the concentration of M+ and X- in the solution will be equal to x multiplied by 0.000806 mol/dm³.
The equation for the dissociation of Mx is:
Mx ↔ xM+ + xX-
Let the solubility of Mx be represented as S.
Then, Ksp for Mx is given by the expression Ksp = [M+]^x[X-]^x= S²= (0.000806x)²= 6.532 x 10⁻⁸.
Answer: 6.532 x 10⁻⁸.
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Draw the product of the hydrogenation of 2‑butyne. Draw all hydrogen atoms. H3C−C≡C−CH3+2H2−→−Pt
The product of hydrogenation of butyne is H3C-CH=CH-CH3, and the product is butene as the product of the reaction would have a double bond.
Hydrogenation is the process of adding hydrogen to a compound or breaking the molecule's double or triple bond. The reaction between hydrogen gas and unsaturated organic compounds occurs in the presence of catalysts such as platinum, palladium, or nickel, and the reaction is termed hydrogenation. It is an exothermic reaction that typically takes place at high pressure and temperature. To draw the product of the hydrogenation of 2‑butyne, H3C−C≡C−CH3+2H2−→−Pt, and draw all hydrogen atoms, we must first comprehend the molecular structure of 2‑butyne. It is an alkyne with four carbons in its structure. We can represent it in structural form as:H3C−C≡C−CH3We must first identify the carbon atoms involved in the triple bond and add two hydrogen atoms to each of the carbons.
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1. A local FM radio station broadcasts at an energy of 6.53×10-29 kJ/photon.
Calculate the frequency at which it is broadcasting.
Frequency = _______ MHz
(1 MHz = 106 sec -1)
----------------------------------------------
2. A local FM radio station broadcasts at a frequency of 92.1 MHz.
Calculate the energy of the frequency at which it is broadcasting.
Energy = ______ kJ/photon
(1 MHz = 106 sec -1)
The energy of a single photon of an electromagnetic wave can be related to its frequency using the equation: E = hf, where E is the energy of a single photon, h is Planck's constant, and f is the frequency of the wave.
1. The energy of a single photon of an electromagnetic wave can be related to its frequency using the equation: E = hf, where E is the energy of a single photon, h is Planck's constant, and f is the frequency of the wave. Using this equation, we can calculate the frequency of the FM radio station given its energy. We are given the energy of the photon as 6.53 x 10^-29 kJ/photon.
Since 1 MHz = 10^6 sec^-1, we can convert the frequency to sec^-1 by multiplying by 10^6. Therefore, the frequency is:f = E/h = (6.53 x 10^-29 kJ/photon)/(6.626 x 10^-34 J s) = 9.83 x 10^4 sec^-1 = 98.3 kHz. (Note that we convert the energy to joules since Planck's constant is in joule seconds.) Therefore, the frequency at which the radio station is broadcasting is 98.3 kHz.
2. Using the same equation E = hf, we can calculate the energy of a single photon given its frequency. We are given the frequency of the FM radio station as 92.1 MHz. To convert to sec^-1, we need to multiply by 10^6 since 1 MHz = 10^6 sec^-1. Therefore, the frequency is:f = 92.1 x 10^6 sec^-1. Plugging this into the equation, we have:E = hf = (6.626 x 10^-34 J s)(92.1 x 10^6 sec^-1) = 6.10 x 10^-26 J/photon. (Note that we convert the frequency to Hz since Planck's constant is in joule seconds.) To convert this energy to kJ/photon, we divide by 1000. Therefore, the energy of the frequency at which the radio station is broadcasting is 6.10 x 10^-29 kJ/photon.
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Which of the following would be expected to form hydrogen bonds with water? Choose all that apply propyl alcoholHc0 но methyl acetate H propaneCm нно N-methylpropanamide H None of the Above
Hydrogen bonding is a kind of dipole-dipole interaction that happens between molecules that contain hydrogen atoms that are connected to extremely electronegative atoms such as oxygen (O), nitrogen (N), or fluorine (F).
Hence, the molecules that have either oxygen, nitrogen, or fluorine atoms which are capable of forming hydrogen bonds with water are expected to form hydrogen bonds with water.Out of the given options, Propyl alcohol, N-methylpropanamide, and ethanol would be expected to form hydrogen bonds with water. Therefore, the answer is "long answer"Option A: Propyl alcohol (CH3CH2CH2OH)It contains the –OH group which can participate in hydrogen bonding with water. Propyl alcohol can form hydrogen bonds with water.
Hc0 но (Methyl acetate)Methyl acetate (CH3COOCH3) is an ester. It does not have an -OH group that can participate in hydrogen bonding. So, option B is incorrect.Option C: PropaneCm нно (2-Methylpropanol)2-Methylpropanol has an -OH group but it does not have an oxygen atom. Therefore, it can’t participate in hydrogen bonding with water. So, option C is incorrect.Option D: N-methylpropanamide (CH3CH2CH2CONHCH3)It has a carbonyl group that contains an oxygen atom, so N-methylpropanamide can form hydrogen bonds with water. Thus, option D is correct.Option E: HNone of the AboveHence, the option None of the Above is incorrect since Propyl alcohol and N-methylpropanamide can form hydrogen bonds with water. Thus, the correct answer is "long answer" i.e options A and D.
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calculate the number of grams of fe2o3 needed to react with 18.3 g c.
By using the stoichiometry of the reaction, we can determine the molar ratio between [tex]Fe_2O_3[/tex] and C and convert the given mass of C into moles. Approximately 243.69 grams of [tex]Fe_2O_3[/tex] are needed to react with 18.3 grams of carbon
To solve this problem, we need to know the balanced chemical equation for the reaction between[tex]Fe_2O_3[/tex] and C. Let's assume the equation is:
[tex]Fe_2O_3[/tex] + C → Fe + [tex]CO_2[/tex]
From the equation, we can see that the molar ratio between [tex]Fe_2O_3[/tex] and C is 1:1. This means that one mole of [tex]Fe_2O_3[/tex] reacts with one mole of C.
First, we convert the given mass of C (18.3 g) into moles. To do this, we divide the mass of C by its molar mass. The molar mass of carbon is approximately 12 g/mol, so:
Moles of C = 18.3 g / 12 g/mol = 1.525 mol
Since the molar ratio between [tex]Fe_2O_3[/tex] and C is 1:1, we know that the number of moles of [tex]Fe_2O_3[/tex] required will also be 1.525 mol.
To convert moles of [tex]Fe_2O_3[/tex] into grams, we multiply the moles by its molar mass. The molar mass of [tex]Fe_2O_3[/tex] is approximately 159.7 g/mol. Therefore:
Mass of Fe2O3 = 1.525 mol * 159.7 g/mol ≈ 243.69 g
Therefore, approximately 243.69 grams of [tex]Fe_2O_3[/tex] are needed to react with 18.3 grams of carbon.
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TRUE/FALSE. one gram of iron(ii) chloride has a higher mass percentage of chloride than 1 gram of iron(iii) chloride.
The statement " one gram of iron(ii) chloride has a higher mass percentage of chloride than 1 gram of iron(iii) chloride." is TRUE.
Iron (II) chloride has a higher mass percentage of chloride than iron (III) chloride. It is because iron (II) chloride has a formula weight of 126.75 g/mol and the molar mass of its chloride ion is 35.45 g/mol. This makes the mass percentage of chloride in one gram of Iron (II) chloride to be;
Mass of chloride in one gram of iron(II) chloride = (2 * 35.45 g/mol)/126.75 g/mol= 0.5564 g chloride in 1 gram of iron (II) chloride.
Mass percentage of chloride in iron (II) chloride = (0.5564 g chloride / 1 g iron(II) chloride) × 100%= 55.64%.
Iron (III) chloride has a formula weight of 162.20 g/mol, and the molar mass of its chloride ion is 35.45 g/mol. This makes the mass percentage of chloride in one gram of Iron (III) chloride to be:
Mass of chloride in one gram of iron(III) chloride = (3 * 35.45 g/mol) /162.20 g/mol= 0.6496 g chloride in 1 gram of iron (III) chloride. Mass percentage of chloride in iron (III) chloride = (0.6496 g chloride / 1 g iron(III) chloride) × 100%= 64.96%.
Thus, it can be concluded that one gram of Iron (II) chloride has a higher mass percentage of chloride than one gram of Iron (III) chloride, so the statement is TRUE.
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False. One gram of iron(II) chloride [tex](FeCl2[/tex]) does not necessarily have a higher mass percentage of chloride than one gram of iron(III) chloride ([tex]FeCl3[/tex]).
The mass percentage of an element in a compound is calculated by dividing the mass of the element by the total mass of the compound and multiplying by 100.
In [tex]FeCl2[/tex], the molar mass of iron is 55.85 g/mol, and the molar mass of chlorine is 35.45 g/mol. Therefore, the total mass of[tex]FeCl2[/tex] is approximately 126.75 g/mol.
In FeCl3, the molar mass of iron is still 55.85 g/mol, but there are three chlorine atoms present, so the molar mass of chlorine is 3 * 35.45 g/mol = 106.35 g/mol. Thus, the total mass of FeCl3 is approximately 162.2 g/mol.
Comparing the mass percentages of chloride, we find that [tex]FeCl3[/tex]has a higher mass percentage of chloride because the molar mass of chloride is a larger fraction of the total mass of the compound.
Therefore, one gram of[tex]FeCl3[/tex] has a higher mass percentage of chloride than one gram of [tex]FeCl2[/tex].
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C6H5COOH(s) -- C6H5COO-(aq) + H+(aq)
Ka = 6.46 x 10e-5
Benzoic acid, C6H5COOH, dissociates in water as shown in the equation above. A 25.0 mL sample of an aqueous solution of pure benzoic acid is titrated using standardized 0.150 M NaOH.
After addition of 15.0 mL of the 0.150 M NaOH, the pH of the resulting solution is 4.37. Calculate the following:
The number of moles of NaOH added.
Please show steps.
Thank you in advance!
The number of moles of NaOH added is 0.00225 mol.
To calculate the number of moles of NaOH added, we can use the stoichiometry of the reaction between benzoic acid (C6H5COOH) and NaOH. According to the balanced equation, 1 mole of benzoic acid reacts with 1 mole of NaOH. Given that the concentration of NaOH is 0.150 M and 15.0 mL of NaOH solution is added, we can first convert the volume to liters by dividing it by 1000:
Volume of NaOH = 15.0 mL / 1000 mL/L = 0.015 L
Next, we can calculate the number of moles of NaOH using the formula:
moles of NaOH = concentration × volume
moles of NaOH = 0.150 M × 0.015 L = 0.00225 mol
Therefore, the number of moles of NaOH added is 0.00225 mol.
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E5: Please show complete solution and explanation. Thank
you!
Determine AS when 2 moles of SO₂(g) undergo a change of state from 25°C and 1 atm to 325°C and 20 atm pressure. Cp = 6.077 +23.54x10-³T-9.69x10-6T2 cal deg-¹mol-¹.
The entropy change when 2 moles of SO₂(g) undergo a change of state from 25°C and 1 atm to 325°C and 20 atm pressure is 14.43 cal/K.
The entropy change can be calculated using the following equation:
[tex]\begin{equation}\Delta S = nCp \ln\left(\frac{T_2}{T_1}\right) + R \ln\left(\frac{P_2}{P_1}\right)[/tex]
where:
ΔS is the entropy change (in cal/K)
n is the number of moles (2 moles)
Cp is the heat capacity at constant pressure (6.077 + 23.54x10-³T-9.69x10-6T₂ cal/mol/K)
T₁ is the initial temperature (25°C = 298 K)
T₂ is the final temperature (325°C = 603 K)
R is the gas constant (1.987 cal/mol/K)
P₁ is the initial pressure (1 atm)
P₂ is the final pressure (20 atm)
Plugging in the values, we get:
[tex]\begin{equation}\Delta S = (2 \text{ mol})(6.077 + 23.54 \times 10^{-3} T - 9.69 \times 10^{-6} T^2 \text{ cal/mol/K}) \ln\left(\frac{603}{298 \text{ K}}\right) + (1.987 \text{ cal/mol/K}) \ln\left(\frac{20 \text{ atm}}{1 \text{ atm}}\right)[/tex]
ΔS = 14.43 cal/K
Therefore, the entropy change when 2 moles of SO₂(g) undergo a change of state from 25°C and 1 atm to 325°C and 20 atm pressure is 14.43 cal/K.
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Which of the following reactions is associated with the lattice energy of SrSe (ΔH°latt)? Sr(s) + Se(s) → SrS(s) SrS(s) → Sr(s) + Se(s) Sr2+(aq) + Se2-(aq) → SrSe(s) SrSe(s) → Sr2+(aq) + Se2-(aq) Sr2+(g) + Se2-(g) → SrSe(s)
The correct reaction associated with the lattice energy of SrSe (ΔH°latt) is Sr2+(g) + Se2-(g) → SrSe(s).
What is lattice energy?Lattice energy refers to the energy released when gaseous ions are combined to form an ionic solid. It is calculated using Coulomb's law, which calculates the attractive force between the oppositely charged ions in the solid. It is expressed in kJ/mol and is a measure of the strength of the ionic bonds present in the solid. What is the reaction associated with lattice energy? The lattice energy of an ionic compound can be determined using the Born-Haber cycle, which shows the enthalpy changes associated with the formation of the solid from its constituent elements. In the case of SrSe, the following reaction is associated with the lattice energy of SrSe (ΔH°latt): Sr2+(g) + Se2-(g) → SrSe(s)The above reaction shows the formation of the ionic solid SrSe from its constituent ions. The lattice energy can be calculated using Hess's law and the enthalpies of formation of the reactants and products.
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what is the product of 5-nitro-2-furaldehyde and aminoguanidine bicarbonate
5-nitro-2-furanylguanidine is the product of 5-nitro-2-furaldehyde and aminoguanidine bicarbonate.
A substance known as 5-nitro-2-furanylguanidine can be created via the reaction of 5-nitro-2-furdehyde with aminoguanidine bicarbonate. The formation of a new carbon-nitrogen bond occurs as a result of the condensation of the amino group of aminoguanidine bicarbonate with the aldehyde group of 5-nitro-2-furaldehyde.
The following is a representation of the reaction's chemical equation:
5-nitro-2-furanylguanidine + carbon dioxide + water = 5-nitro-2-furdehyde + aminoguanidine bicarbonate
It's crucial to remember that the circumstances of the reaction and the particular reaction mechanism may have an impact on the results, and extra byproducts or variants of the product may appear. Therefore, in order to obtain precise information about the reaction and product generation, it is usually advisable to consult specialised experimental protocols or literature sources.
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Match the state of oxidation for ubiquinone (Q) and cytochromes , e., and as with cach mitochondrial condition Abundant NADH and Oy, but cyanide added Abundant NADH, buto, exhausted Abundant o, but NADH exhausted Abundant NADH and o,
The state of oxidation for ubiquinone (Q) and cytochromes can be matched with mitochondrial react conditions. Ubiquinone (Q) is a mobile electron carrier found in the inner membrane of mitochondria.
Abundant NADH and O2, but cyanide added: Ubiquinone (Q) is in the reduced state (QH2) and cytochromes are also in the reduced state (Fe2+).Abundant NADH, but O2 exhausted: Ubiquinone (Q) is in the reduced state (QH2) and cytochromes are in the oxidized state (Fe3+).Abundant O2, but NADH exhausted: Ubiquinone (Q) is in the oxidized state (Q) and cytochromes are also in the oxidized state (Fe3+).Abundant NADH and O2: Ubiquinone (Q) is in the reduced state (QH2) and cytochromes are in the oxidized state (Fe3+).
It is a lipid-soluble compound that accepts electrons from NADH and FADH2, and transfers them to cytochromes. The state of oxidation of ubiquinone (Q) can be either reduced (QH2) or oxidized (Q).Cytochromes are proteins that contain iron in a heme group. They are embedded in the inner membrane of mitochondria and act as electron carriers between ubiquinone and oxygen.
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Which detector in the following list has the highest sensitivity for determination of acetone? highest Nitroget-phosphorus detector not the highest Flame photometric detector not the highest Flame ionization detector not the highest Atomic emission detector
The detector with the highest sensitivity for determination of acetone is the flame ionization detector.
Flame ionization detector is the most widely used detector for gas chromatography. It is highly sensitive for organic compounds like acetone. FID detectors are best suited for organic compounds, and they work on the principle that the organic compounds get ionized by the hydrogen flame and generate electrons.
These electrons pass through an electrical field, which produces a signal that is proportional to the number of ions present. This detector has the highest sensitivity for determination of acetone.
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Some of the important pollutants in the atmosphere are ozone (O3), sulfur dioxide, and sulfur trioxide. Write Lewis structures for these three molecules. Show all resonance structures where applicable.
The resonance structures of the compounds have been shown in the images attached.
What are resonance structures?
When there are multiple accurate ways to represent the distribution of electrons in a molecule or an ion, alternative Lewis structures called resonance structures can be created. Particularly in organic chemistry, they are employed to indicate the delocalization of electrons within a molecule or ion.
When many Lewis structures that differ only in the positioning of electrons (for instance, the location of double bonds or lone pairs) may accurately represent a molecule or an ion, resonance occurs. The molecule's actual electronic structure is a hybrid or combination of different resonance structures, and no one resonance form can adequately capture the underlying structure.
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Ammonium nitrate undergoes thermal decomposition to produce only gases: NH4NO2 (s) ---> N2 (9) + 2H20 (g) What volume (L) of gas is produced by the decomposition of 35.0 g of NH4NO2 (s) at 525 °C and 1.5 atm? 24 160 Ο Ο Ο Ο 72 47 QUESTION 12 The thermal decomposition of potassium chlorate can be used to produce oxygen in the laboratory. 2KCIO3 (s) ---> 2KCI (s) + 302 (9) What volume (L) of O2 gas at 25°C and 1.00 atm pressure is produced by the decomposition of 7.5g of KCIO3 (s)? 0 3.7 2.0 7.5 4.5 QUESTION 13 True or False. Dalton's atomic theory of matter states that the proton uniquely identify the element. True False
Previous question
Dalton's atomic theory of matter states that the proton uniquely identify the element. The given statement is false. Dalton's atomic theory of matter states that atoms are indivisible and indestructible.
The volume of gas produced by the decomposition of 35.0 g of
NH4NO2 (s) at 525 °C
and 1.5 atm can be calculated as follows:Given that,Mass of
NH4NO2 = 35.0 g
Temperature (T) = 525 °C = (525 + 273.15) K = 798.15 K
Pressure (P) = 1.5 atm Molar mass of
NH4NO2 = 80.04 g/mol
Number of moles of
NH4NO2 = mass / molar mass = 35.0 g / 80.04 g/mol = 0.436 mol
As per the given reaction,1 mole of
NH4NO2 produces 1 mole of N2 and 2 moles of
H2O0.436 mol of NH4NO2
will produce 0.436 mol of N2 and 0.872 mol of H2ONow, we need to use the ideal gas equation
, PV = nRT,
to calculate the volume of H2O produced.
V = nRT / P = (0.872 mol)(0.08206 L atm K⁻¹ mol⁻¹)(798.15 K) / (1.5 atm) ≈ 38.6 L
Therefore, the volume of H2O produced is approximately 38.6 L.What volume (L) of O2 gas at 25°C and 1.00 atm pressure is produced by the decomposition of 7.5g of
KCIO3 (s)?Given that,
Mass of K CIO3 = 7.5 g
Temperature (T) = 25 °C = 25 + 273.15 = 298.15 K
Pressure (P) = 1.00 atm Molar mass of KCIO3 = 122.55 g/mol
Number of moles of
KCIO3 = mass / molar mass = 7.5 g / 122.55 g/mol = 0.0612 mol
As per the given reaction,1 mole of KCIO3 produces 3 moles of
O20.0612 mol of KCIO3 will produce 0.0612 × 3 = 0.1836 mol of O2
Now, we need to use the ideal gas equation, PV = nRT, to calculate the volume of O2 produced.
V = nRT / P = (0.1836 mol)(0.08206 L atm K⁻¹ mol⁻¹)(298.15 K) / (1.00 atm) ≈ 4.5 L
Therefore, the volume of O2 produced is approximately 4.5 L.Dalton's atomic theory of matter states that the proton uniquely identify the element. The given statement is false. Dalton's atomic theory of matter states that atoms are indivisible and indestructible.
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Determine whether the solutions formed by each salt will be acidic, basic, or neutral with Explanations!: NaHCO3, CH3CH2NH3Cl, KNO3, Fe(NO3)3
The solutions formed by NaHCO₃, CH₃CH₂NH₃Cl, KNO₃, and Fe(NO₃)₃ salts can be classified as follows: NaHCO₃ will be weakly basic, CH₃CH₂NH₃Cl will be acidic, KNO₃ will be neutral, and Fe(NO₃)₃ will be acidic.
1. NaHCO₃: Sodium bicarbonate, NaHCO₃, is a weak base. When dissolved in water, it forms Na⁺ ions and HCO₃⁻ ions. The presence of HCO₃⁻ ions, which can accept protons, makes the solution weakly basic.
2. CH₃CH₂NH₃Cl: This compound is ethylammonium chloride, which is a salt of a weak base (ethylamine, CH₃CH₂NH₂) and a strong acid (HCl). Ethylamine is a weak base, and when it forms a salt with a strong acid, the resulting solution will be acidic. The chloride ion does not significantly affect the pH.
3. KNO₃: Potassium nitrate, KNO₃, is a salt of a strong base (KOH) and a strong acid (HNO₃). Since both the cation (K⁺) and anion (NO₃⁻) do not affect the pH when dissolved in water, the solution will be neutral.
4. Fe(NO₃)₃: Iron(III) nitrate, Fe(NO₃)₃, is a salt of a strong acid (HNO₃) and a weak base (Fe(OH)₃). The presence of the Fe³⁺ cation can hydrolyze water molecules, releasing H⁺ ions and making the solution acidic.
In summary, NaHCO₃ will be weakly basic, CH₃CH₂NH₃Cl will be acidic, KNO₃ will be neutral, and Fe(NO₃)₃ will be acidic when dissolved in water.
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what is the product of the following reaction? ch3ch2o - hcl
The product of the following reaction is CH3CH2Cl. The product of the reaction will be CH3CH2Cl (ethyl chloride) and water (H2O).
An alcohol reacts with hydrochloric acid (HCl) to produce an alkyl halide and water. The reaction is known as the dehydration of alcohols. This reaction proceeds by the elimination of a water molecule from the alcohol. The mechanism of the reaction is an SN1 (substitution nucleophilic unimolecular) reaction.
Here is the mechanism for the reaction between ethanol (CH3CH2OH) and HCl (aq):The reaction between CH3CH2O- and HCl will also follow the same mechanism. The product of the reaction will be CH3CH2Cl (ethyl chloride) and water (H2O).
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How many moles of H2 can be produced from x grams of Mg in magnesium-aluminum alloy? The molar mass of Mg is 24.31 g mol−1. Express your answer in terms of x to four decimal places (i.e., 0.5000x).
The number of moles of H₂ that can be produced from x grams of Mg is 0.0411x
To determine the number of moles of H₂ produced from x grams of Mg, we need to consider the stoichiometry of the reaction and the molar ratios involved.
The balanced chemical equation for the reaction between Mg and HCl to produce H₂ is:
Mg + 2HCl -> MgCl₂ + H₂
From the equation, we can see that 1 mole of Mg reacts with 2 moles of HCl to produce 1 mole of H₂. Therefore, the molar ratio of Mg to H₂ is 1:1.
The molar mass of Mg is given as 24.31 g/mol, which means that 24.31 grams of Mg is equivalent to 1 mole of Mg.
Since x grams of Mg is used in the reaction, the number of moles of Mg is given by:
moles of Mg = x (grams of Mg) / molar mass of Mg
moles of Mg = x / 24.31
Since the molar ratio of Mg to H₂ is 1:1, the number of moles of H₂ produced is also x / 24.31.
Therefore, the number of moles of H₂ that can be produced from x grams of Mg is 0.0411x (rounded to four decimal places).
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the gas, neon, is found in dry air at sea level at a concentration of 1.82×10-3 percent by volume. what is the concentration of ne expressed in ppm?
Given that the gas, neon, is found in dry air at sea level at a concentration of 1.82×10-3 percent by volume. We have to determine the concentration of ne expressed in ppm.
To determine the concentration of ne expressed in ppm, we use the formula:ppm (parts per million) = (parts / total) * 10⁶Here, parts = volume of ne in dry air at sea level = 1.82×10-3 percent by volume Total = Total volume of dry air at sea levelThe volume of air at sea level is 1.25 × 104 m³.
Let's substitute the values in the formula: ppm = (1.82×10-3 / 100) * 10⁶ppm = 18.2Neon is present in dry air at sea level at a concentration of 18.2 ppm (parts per million).Thus, the concentration of ne expressed in ppm is 18.2 ppm.
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