When 20. 0 g NH₃ and 50. 0 g O₂ are allowed to react, NH₃ is the limiting reagent.
What is limiting reagent ?Limiting reagent is defined as that reactant in a chemical reaction which is completely consumed in reaction.
Given,
Mass of NH₃ = 20 g
Mass of O₂ = 50 g
Molecular mass of NH₃ = 14 + 7 = 17 g
Molecular mass of O₂ = 2 × 16 = 32 g
Mole = given mass/ molecular mass
Mole of ammonia = 20/17
= 1.17 mole
Moles of O2 = 50/32
= 1.56 mole
Chemical equation:
4NH₃(g) + 3O₂(g) ⟶ 2N₂(g) +6H₂O
From above reaction it is clear that 4 moles of NH₃ react with 3 moles of oxygen.
So, 1 mole of ammonia react with = 3/4 moles of O₂
= 0.75 moles of O₂
Also, 1.18 moles of ammonia react with
= 1.18 × 0.75
= 0.885 moles of O₂
Thus, from above we concluded that ammonia is completely consumed in reaction. Therefore ammonia is limiting reagent.
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At 2000 K the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively. Calculate the value of the equilibrium constant Kp at 2000 K.
At 2000 K, if the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively, then the value of the equilibrium constant Kp at 2000 K is 9.089.
What is partial pressure?The pressure that is exerted by one among the mixture of gases if it occupies the same volume on its own is known as Partial pressure.
As we know that,
Kp is the constant of a certain reaction at equilibrium.
For the given chemical reaction:
H2 +S -------H2S
The expression of Kp for above equation follows:
Kp = p(H2S) /{p(H2) ×p(S)}
where,
p(H2S) is the partial pressure of H2S = 0.0151atm
p(H2) is the partial pressure of H2 = 0.0472atm
p(S) is the partial pressure of S = 0.0352 atm
Kp can be calculated as:Kp = 0.0151/(0.0472 × 0.0352)
Kp = 0.0151/0.00166144
Kp = 9.089
Thus, we find that the value of equilibrium constant Kp at 2000K is 9.089.
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What is the binding energy of the electron in kj/molkj/mol? [note that keke = 12mv212mv2 and 1 electron volt (evev) = 1. 602×10−19j. 1. 602×10−19j. ]
The binding energy of the electron is 1.237 ×10^(-16) kj/ mol.
The given parameter
wavelength of photon,
λ = 0.999nm
= 0.999x10⁻⁹ m
K.E of emitted photon,
K.E = 940 ev
The binding energy of electron is calculated as follows:
From Einstein's mass defect equation=
ΔE = Δmc²
Also, from Einstein's photo electric equation=
E = Ф + K.E
Where;
Ф is binding energy of electron on metal surface.
The energy of on mole of electron, the emitted is calculated as:
[tex]E = hf =h \frac{c}{λ} = (6.626×10^{-34} ) × \frac{{3×10^{8} }}{0.999×10^{-9} } \\\\E= 1.989×10^{-16}[/tex]
The K.E of emitted electron in Joules is
[tex]K.E = 940 × \frac{1}{2} ×1.602 ×\ 10^{-19} J\\\\ = 0.752 × 10^{-16} J[/tex]
The binding energy is electron is calculated as:
[tex]Ф = E - K.E\\= (1.989 - 0.752) ×10^{-16}\\ =1.237 × 10^{-16} J[/tex]
Question: An X-ray photon of wavelength 0.999nm strikes a surface. The emitted electron has a kinetic energy of 940 eV. What isthe binding energy of the electron in kJ/mol? (KE=1/2mv2; 1 electron volt (eV) = 1.602 x10-19J)
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What would be the effect on the percentage recovery if not enough naoh were added in step 2 to react with both the unreacted hno3 and the cu2 present at the end of step 1?
The metallic cu⁺ will not be formed to calculate percentage recovery.
What is percentage recovery?
Most commonly "percent recovery" in chemistry refers to the quantity of recovered substance following a purifying procedure. This purification procedure could involve anything from completely separating a particular ingredient to removing a molecule totally.
If we do not completely react the HNO₃ in the reacion mixture, it will not fully reduce Cu ions which will not form all the metallic copper or if at all its formed the quantity will be very low that we will use to calculate the percentage recovey at the end.
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Calculate the molar solubility of silver(i) bromate with ksp = 5. 5×10-5. also, convert the molar solubility to the solubility. the molar solubility is ___________ and the solubility is ____________
The molar solubility is 7.4×[tex]10^{-3}[/tex] M and the solubility is 7.4×[tex]10^{-3}[/tex] g/L .
Calculation ,
The dissociation of silver bromide is given as ,
[tex]AgBr[/tex] → [tex]Ag ^{+}[/tex] + [tex]Br^{-}[/tex]
S
- S S
Ksp = [[tex]Ag ^{+}[/tex] ] [ [tex]Br^{-}[/tex] ] = [S] [ S ] = [tex]S^{2}[/tex]
S = √ Ksp = √ 5. 5×[tex]10^{-5}[/tex] = 7.4×[tex]10^{-3}[/tex]
The solubility =7.4×[tex]10^{-3}[/tex] g/L
The molar solubility is the solubility of one mole of the substance.
Since , one mole of [tex]AgBr[/tex] is dissociates and form one mole of each [tex]Ag ^{+}[/tex] and [tex]Br^{-}[/tex] ion . So, solubility is equal to molar solubility but unit is different.
Molar solubility = 7.4×[tex]10^{-3}[/tex] mol/L = 7.4×[tex]10^{-3}[/tex] M
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Select the correct boxes. which two elements have the same number of valence electrons?
Carbon and silicon have same number of valance electrons which is 4 electrons
Now, Barium is a 2nd group element. So, it has two valance electrons.
Silicon is a 16th group element and it has 4 valance electrons as does the carbon. This is because they both stay in the same group in the periodic table.
Neon is a noble gas which has 8 valance electrons and stays in the 18th group.
Therefore, carbon and silicon have same number of valance electrons which is 4 electrons.
What are Valence electrons ?The electrons in an atom's outermost shell, or energy level, are called valence electrons. For instance, the valence electrons of oxygen are six, with two in the 2s subshell and four in the 2p subshell.
The number of valence electrons for neutral atoms is the same as the number of the atom's main group. A periodic table element's column can be used to determine its main group number. For instance, carbon, which belongs to group 4, has four valence electrons. Group 6 oxygen contains six valence electrons.Learn more about Valence electrons here:
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For a typical titration, 0. 010 m naoh is the titrant (in the buret). if the initial buret reading is 2. 45 ml, and the final buret reading is 18. 70 ml, how much naoh was used for the titration?
16.25 ml NaOH was used for the titration.
Titration:"The process of calculating the quantity of a material A by adding measured increments of substance B, the titrant, with which it reacts until exact chemical equivalency is obtained (the equivalence point)" is the definition of titration.
A titration is a method for figuring out the concentration of an unknown solution by using a solution with a known concentration. Until the reaction is finished, the titrant (the known solution) is typically added from a buret to a known volume of the analyte (the unknown solution).
0. 010 m NaOH is the titrant (in the buret).
The initial buret reading is 2. 45 ml
The final buret reading is 18. 70 ml
The volume of NaOH = 18.70ml - 2.45 ml
= 16.25 ml
Therefore, 16.25 ml NaOH was used for the titration.
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A student makes up 2 l of a 3. 0 m aqueous solution of hbr. to this solution she adds 1 l of a 4 m naoh solution. what is the ph of the resulting solution?
A student makes up 2 l of a 3. 0 m aqueous solution of HBr. to this solution she adds 1 l of a 4 m NaOH solution, then the pH of the resulting solution is 13.83.
What is normality?Normality is defined as the ratio of equivalent mass of compound to the volume of solution in litre.
N1 is the normality of HBR = 3m
N2 is the normality of NaOH = 4m
V1 is the volume of the HBr = 2l
V2 is the volume of the NaOH = 1l
V is the total volume of solution = V1 + V2 = 2l +1l
= 3l
Normality of the solution = N
As we know that,
N1V1 - N2V2 = NV
3 × 2 – 4 × 1 = N × 3
6 – 4 = N – 3
N = 2/3 = 0.67 m
(OH-) = N = 0.67 m
Since normality of NaOH is greater than BR . Hence the resulting solution is alkaline.
pOH = -log[OH-]
POH = - log (0.67) = 0.17
As we know that,
PH + pOH = 14
pH = 14 – 0.17
= 13.83
Thus, we calculate that the pH of the resulting solution is 13.83.
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If 2. 0 x 1023 argon {ar) atoms strike 4. 0 cm2 of wall per second at a 90° angle to the wall when moving with a speed of 45,000 cm s-1, what pressure {in atm) do they exert on the wall?
If 2. 0 x 1023 argon {Ar) atoms strike 4. 0 [tex]cm^{2}[/tex] of wall per second at a 90° angle to the wall when moving with a speed of 45,000 [tex]cm^{-1}[/tex].The pressure will be 0.295 atm.
The force delivered perpendicularly to an object's surface per unit area across which that force would be dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure defines the pressure. The units was using to express pressure vary.
Calculation of force:
Force excerted by the Ar atoms, (F) = Change in momentum for one Ar atom 7 / unit time × number of atom
F = 2mv /1s × number of atoms.
Putting the given data in above equation.
F = 2 × 39.95 amu × 450 m/s/ 1s × 1.66 × [tex]10^{-27}[/tex] kg /amu × 2 × [tex]10^{23}[/tex] atom
F = 11.94 N
Now, pressure can be calculated by using the formula:
P = Force exerted /area
P = 11.94 N/ 4.0 [tex]cm^{2}[/tex] × [tex]cm^{2}[/tex]/ [tex]10^{-4} m^{2}[/tex]
P = 0.295 atm
Therefore, the pressure will be 0.295 atm.
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A substance with a high [h ] would likely have which additional characteristics?
Answer:
Is [h] really [H]? What characteristics are mentioned?
Explanation:
A high [H} means high acid concentration.
Read the chemical equation. n2 3h2 → 2nh3 using the volume ratio, determine how many liters of nh3 is produced if 1.2 liters of h2 reacts with an excess of n2, if all measurements are taken at the same temperature and pressure?
0.8 liters of NH₃ is produced.
What is Chemical equation?A chemical equation is a symbolic representation of a chemical reaction in the form of symbols and formulae, where the reactant entities are given on the left and the product entities are given on the right, with a plus sign separating the entities in both the reactants and the products and an arrow pointing in the direction of the products to indicate the reaction's direction. The absolute values of the stoichiometric numbers are shown as coefficients next to the symbols and formulas of the entities. Jean Beguin drew the first chemical equation in 1615.
pressure - The SI unit for pressure is the pascal (Pa), which is equal to one newton per square metre (N/m2) of force per unit area of surface. An object's pressure is inversely proportional to the area it is pressing on and inversely proportional to the force it applies.
Given chemical reaction is:
N₂ + 3H₂ → 2NH₃
From the stoichiometry of the reaction, it is clear that:
3 liters of H₂ = produce 2 liters of NH₃
1.2 liters of H₂ = produce 2/3 × 1.2 = 0.8 liters of NH₃
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1) A certain compound has an empirical formula of CH_6O_ 2. Its molar mass is between 285 and 315 g/mol. What is its molecular formula?
CH_6O_2
C_4H_24O_8
C_6H_36O_12
C_5H_30O_10
2) certain compound has an empirical formula of NH_2O. Its molar mass is between 55 and 65 g/mol. What is its molecular formula?
NH_2O
N_2H_2O_2
N_2H_4O_2
N_4H_8O_4
3) A certain compound is found to have the percent composition (by mass) of 88.9 percent C and 11.1 percent H. The molar mass of the compound was found to be 54.0 g/mol. Calculate the empirical formula and the molecular formula.
C_2H_3 and C_4H_6
C_2H_6 and C_3H_9
CH_2 and C_3H_6
CH_3 and C_2H_6
4) The characteristic odor of pineapple is due to ethyl butyrate. It contains 62.07 percent carbon, 10.34 percent hydrogen, and 27.59 percent oxygen. Determine the empirical formula.
C_6H_6O_2
C_6H_12O_2
C_3H_3O
C_3H_6O
5) Zircon is a diamond-like material that has the composition 49.76 percent Zr, 15.32 percent Si, and 34.91 percent O. What is the empirical formula of zircon?
ZrSiO
ZrSiO_2
ZrSiO_3
ZrSiO_4
1. The molecular formula of the compound is C₆H₃₆O₁₂
2. The molecular formula of the compound is N₂H₄O₂
3 The empirical formula and molecular formula of the compound are: C₂H₃ and C₄H₆
4. The empirical formula of the compound is C₃H₆O
5. The empirical formula of the compound is ZrSiO₄
1. How to determine the molecular formula Empirical formula = CH₆O₂Molar mass = (285 + 315) / 2 = 600 / 2 = 300 g/moleMolecular formula =?Molecular formula = empirical × n = molar mass
[CH₆O₂]ₙ = 300
[12 + (6×1) + (16×2)]ₙ = 300
50n = 300
Divide both side by 74
n = 300 / 50
n = 6
Molecular formula = [CH₆O₂]ₙ
Molecular formula = [CH₆O₂]₆
Molecular formula = C₆H₃₆O₁₂
2. How to determine the molecular formula Empirical formula = NH₂OMolar mass = (55 + 65) / 2 = 120 / 2 = 60 g/moleMolecular formula =?Molecular formula = empirical × n = molar mass
[NH₂O]ₙ = 60
[14 + (2×1) + 16]ₙ = 60
32n = 60
Divide both side by 32
n = 60 / 32
n = 2
Molecular formula = [NH₂O]ₙ
Molecular formula = [NH₂O]₂
Molecular formula = N₂H₄O₂
3. How to determine the empirical formula and molecular formulaWe'll begin by obtaining the empirical formula. This is illustrated below:
Carbon (C) = 88.9%Hydrogen (H) = 11.1%Empirical formula =?Divide by their molar mass
C = 88.9 / 12 = 7.4
H = 11.1 / 1 = 11.1
Divide by the smallest
C = 7.4 / 7.4 = 1
H = 11.1 / 7.4 = 3/2
Multiply by 2 to express in whole number
C = 1 × 2 = 2
H = 3/2 × 2 = 3
Thus, the empirical formula of the compound is C₂H₃
Finally, we shall determine the molecular formula of the compound. This is illustrated below:
Molar mass of compound = 54 g/molEmpirical formula = C₂H₃Molecular formula =?Molecular formula = empirical × n = molar mass
[C₂H₃]ₙ = 75.16
[(12×2) + (3×1)]ₙ = 54
27n = 54
Divide both side by 27
n = 54 / 27
n = 2
Molecular formula = [C₂H₃]ₙ
Molecular formula = [C₂H₃]₂
Molecular formula = C₄H₆
4. How to determine the empirical formulaCarbon (C) = 62.07%Hydrogen (H) = 10.34%Oxygen (O) = 27.59%Empirical formula =?Divide by their molar mass
C = 62.07 / 12 = 5.1725
H = 10.34 / 1 = 10.34
O = 27.59 / 16 = 1.724
Divide by the smallest
C = 5.1725 / 1.724 = 3
H = 10.34 / 1.724 = 6
O = 1.724 / 1.724 = 1
Thus, the empirical formula of the compound is C₃H₆O
5. How to determine the empirical formulaZr = 49.76%Si = 15.32%O = 34.91%Empirical formula =?Divide by their molar mass
Zr = 49.76 / 91 = 0.547
Si = 15.32 / 28 = 0.547
O = 34.91 / 16 = 2.182
Divide by the smallest
Zr = 0.547 / 0.547 = 1
Si = 0.547 / 0.547 = 1
O = 2.182 / 0.547 = 4
Thus, the empirical formula of the compound is ZrSiO₄
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How would you separate a mixture of 4-tert-butylphenol and 2- chlorobenzoic acid? Explain the detailed steps including the choice of solvent and why this solvent would be use.
The a mixture of 4-tert-butylphenol and 2- chlorobenzoic acid is separate by the by using bicarbonate solvent.
When solution of bicarbonate is added in mixture of 4-tert-butylphenol and 2- chlorobenzoic acid then 2- chlorobenzoic acid form a carboxylate ion whereas 4-tert-butylphenol is underacted and filtered out.
Since, only 2- chlorobenzoic acid which is acid is convert into its conjugate base by solution of bicarbonate in mixture of 4-tert-butylphenol and 2- chlorobenzoic acid .
However, phenol is less acidic than carboxylic acid. Both phenol and carboxylic acid is soluble in organic solvent . At that point as the phenol isolates as an oil, one needs to cool the blend in an ice shower to encourage crystallization
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If the heat of vaporization for water is 2260 joules/g. How many kilojoules are released when 5. 00 g of steam is converted to liquid at 100°c?
The latent heat of vaporization 5gram of steam converted to liquid at 100°C is 11.3 KJ.
The latent heat of vaporization for a given substance tells you how much energy is required for one mole of that substance to undergo a phase transition or go from a liquid to a gas, at its boiling point.
Joules per gram, an alternative to the more popular kilojoules per mole, are used to express the latent heat of vaporization for water.
Therefore, we must determine how many kilojoules per gram are needed for a certain sample of water to transition from a liquid to a vapor at its boiling point.
As you know, the conversion factor that exists between Joules and kilojoules is 1 kJ = 10³ J
2260 J/g will be equivalent to
[tex]2260 \frac{J}{g} . \frac{1kJ}{1000J } = 2.26 kJ/g\\\\[/tex]
As we know,
2260 = 2.26 . 10³
which means that 2.26 .10³ = 2260J
This is the latent heat of vaporization 5gram of water= 2260J/g × 5g
= 11,300J
= 11.3 KJ
Therefore, the latent heat of vaporization 5gram of steam converted to liquid at 100°C is 11.3 KJ.
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C4h5n(aq) h2o(l)⇌c4h5nh (aq) oh−(aq) express your answers as chemical formulas. enter your answers in the order given in the question separated by commas
In aqueous solutions, the hydrogen ion, also known as the hydronium ion, is a Bronsted-Lowry acid, while the hydroxide ion is a base as a result of the self-dissociation reaction.
[tex]C_4H_5N(aq) + H_2O(l)[/tex] ⇄ [tex]C_4H_5NH (aq) + OH^-(aq)[/tex]
[tex]Bronsted-\\Lowry Acid[/tex] [tex]Conjugate Acid[/tex]
Brønsted–Lowry acid-base theory:Any species that may transfer a proton (H+) to another molecule is a Brnsted-Lowry acid. Any species that can take a proton from another molecule is a Brnsted-Lowry base. In essence, a Brnsted-Lowry base is a proton acceptor (PA) and an acid is a proton donor (PD).
According to the Arrhenius theory, acids are defined as chemicals that dissociate in an aqueous solution to produce hydrogen ions (H+), whereas bases are defined as substances that produce OH (hydroxide ions).
The hydrogen ion, or hydronium ion, is a Brønsted–Lowry acid in aqueous solutions, and the hydroxide ion is a base, by virtue of the self-dissociation reaction.
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_________ is generally an intermolecular force, and __________ is only an intramolecular attractive force.
Hydrogen bonding is generally an intermolecular force, and covalent bonding is only an intramolecular attractive force.
When a hydrogen atom gets bound to a powerfully electronegative atom and is in close proximity to some other electronegative atom with such a single electron pairs, a hydrogen bond occurs as an intermolecular force (IMF).
The three types of intermolecular interactions include dipole-dipole, London dispersion, and hydrogen bonding forces. Metal bonds, ionic bonds, as well as covalent bonds are mostly the three types of intramolecular forces.
Therefore, Hydrogen bonding is generally an intermolecular force, and covalent bonding is only an intramolecular attractive force.
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Hemoglobin has a much greater affinity for carbon monoxide than oxygen. which principle explains why a hyperbaric chamber (containing high levels of oxygen) can treat carbon monoxide poisoning?
Hemoglobin has a much greater affinity for carbon monoxide than oxygen. In a hyperbaric chamber (containing high levels of oxygen) can treat carbon monoxide poisoning, by displacing carbon monoxide from Hemoglobin competitively.
Hemoglobin has a much greater affinity for carbon monoxide than oxygen. This is because, a coordinate bond is formed with Carbon monoxide and Haem structure of the hemoglobin.
Carbon monoxide with Hemoglobin is called as Carboxy haemoglobin.
Presence of oxygen displaces the Carbon monoxide with Hemoglobin that is formed due to poisoning.
Hyperbaric chamber is a chamber which contains pure oxygen in a chamber. The atmospheric pressure is kept about three to four times than the normal, such that the replacement of Carbon monoxide from Haem can occur as fast as possible since this reduces the half life of the Carboxy haemoglobin.
It is advisable not to treat Carbon monoxide poisoning yourself.
Hyperbaric oxygen is used to treat the following conditions as well:
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type of molecule is shown below?
H
O=C
H
Answer:
Carbonyl
Explanation:
While the diagram is slightly unclear, the molecule most likely being shown is a carbonyl. A molecule is a carbonyl when there is a carbon double-bonded to an oxygen.
What is the concentration of a 57. 10 ml solution of hbr that is completely titrated by 35. 00 ml of a 0. 200 m naoh solution?
The concentration of 57.10 ml solution is Hbr that is completely titrated is 0.326.
What is concentration?Concentration is the total amount of substance in one unit of a solution. The concentration is more when there is less solvent.
Concentration = mass / volume
From the formula of dilution M1V1 = M2V2
Given that the volume 1 is 57.10
Volume 2 is 35.00
Mass is 0.200.
M2 is ?
Putting the values in the equation:
0.200 x 57.10 = m2 x 35.00 = 0.326
m2 = 0.326
Thus, the concentration of a 57. 10 ml solution of Hbr is 0.326 m.
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This cement should string up and break approximately 1 inch from the slab. Group of answer choices Zinc Phosphate Zinc Oxide Intermediate restorative material Glass Ionomer
The given description details the methods that are used in Mixing Zinc Phosphate for Permanent Cementation,
The complete description contains the following details:
Personal protective equipment (PPE) is required for the healthcare team, and the student is required to identify and prepare the instrument setup.
Equipment and Supplies
• Glass slab (cool)• Spatula (flexible stainless steel)• Zinc phosphate powder and dispenser• Zinc phosphate liquid and dropper• 2 × 2-inch gauze padsWhat is Cementation?This refers to the use of cement to create a building structure that is used to keep things in place.
Hence, we can see that the Procedural Steps include:
Preparing the Mix
1. Dispense the powder toward one end of the slab and the liquid toward the opposite end.
2. Recap the containers.PURPOSE These materials can be affected by prolonged exposure to the humidity.
3. Divide the powder into small increments as directed by the manufacturer.
4. Incorporate each powder increment into the liquid.NOTE When increment sizes vary, smaller increments are used first. Mixing time per increment also varies; the time is approximately 15 to 20 seconds.
5. Spatulate the mix thoroughly, using broad strokes or a figure-8 movement over a large area of the slab.PURPOSE This aids in dissipating the heat generated during mixing.
6. Test material for appropriate cementation consistency. The cement should string up and break about 1 inch from the slab. Total mixing time is approximately 1 to 2 minutes
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Examples of the surface area change the rate of chemical reactants applied in industry or products, materials?
What's the effect of surface area change
We know
Pressure is indirectly proportional to area
If surface area increases pressure decreasesIf pressure decreases volume increasesIf volume increases no of moles increasesSo production increases.The chemical process of food breakdown is called ________.
a) absorption
b) ingestion
c) digestion
d) secretion
The chemical process of food breakdown is called digestion.
Based about how food is digested, mechanical digestion versus chemical digestion is the two main types of catabolism. The digestive system's four important processes are motility, digesting, absorption, as well as secretion.
Digestion enzymes break down food as it moves from the mouth through our digestive system, transforming it into more easily absorbed nutrients. Chemical digestion would be the term for this disintegration. Amino acids as well as reducing sugars undergo a chemical reaction when food is processed and cooked at a high temperature, creating various flavors and brown colors.
Therefore, the chemical process of food breakdown is called digestion.
Hence, the correct answer will be option (c).
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What characteristic of skeletal muscle cells enables them to efficiently extract oxygen from the blood?
Myoglobin in red slow twitch muscle pulls the O2 off the blood. Your striated muscles, which include your cardiac muscles and skeletal muscles, contain the protein known as myoglobin. Its primary job is to give your muscles' cells oxygen (myocytes). Your body's cells require oxygen to function.
Myoglobin is harmful to the kidneys in large doses. Myoglobin can be released in large volumes into the blood stream in response to severe trauma or muscle injuries, which can harm the kidneys and eventually lead to renal failure. A globin and heme molecule combine to form the dark red protein known as myoglobin.
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What is the molarity of a NaOH solution if 32.47 mL is required to titrate 0.6013 g of potassium hydrogen phthalate (C8H5O4K)
Answer:
0.0907 M
Explanation:
Before you can calculate the molarity, you need to convert grams to moles (via molar mass) and convert mL to L.
(Step 1)
Molar Mass (C₈H₅O₄K):
8(12.011 g/mol) + 5(1.008 g/mol) + 4(15.998 g/mol) + 39.098 g/mol
Molar Mass (C₈H₅O₄K): 204.218 g/mol
0.6013 g C₈H₅O₄K 1 mole
------------------------------ x ------------------ = 0.00294 moles C₈H₅O₄K
204.218 g
(Step 2)
1,000 mL = 1 L
32.47 mL 1 L
--------------- x ----------------- = 0.03247 L
1,000 mL
(Step 3)
Molarity (M) = moles / volume (L)
Molarity = 0.00294 moles / 0.03247 L
Molarity = 0.0907 M
Why do night bird have extraordinary night vision
Answer:
The low light eye sight depends on the rod cells of the eye,and the birds have more amount of rod cell in their eyes, that's why they have an extraordinary night vision
What is the IUPAC name of the compound shown here?
Answer:
2-methylpropanoic acid
Explanation:
no probs chief
What type of reaction is a grignard reaction? What is the critical intermediate (which can be isolated and enables the final product)?
Organometallic Chemical reaction is a Grignard reaction. The critical intermediate (which can be isolated and enables the final product) is the formation of a carbon bond.
The Grignard Reaction is an organometallic chemical reaction that mostly produces C-C bonds. When organic molecules are combined with the Grignard reagent, the Grignard reaction occurs (Rmgx).
The Grignard Reaction is the conversion of an aldehyde or ketone into secondary or tertiary alcohol by the addition of an organomagnesium halide (Grignard reagent). A primary alcohol is produced when formaldehyde and oxygen react.
Alcohol and water molecules have acidic hydrogen atoms that Grignard reagents quickly react with. A proton substitutes the halogen in a Grignard reaction with water, producing an alkane as the end result. Therefore, the Grignard reagent offers a two-step process for changing a haloalkane into an alkane.
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halogens are active nonmetals why
Answer:
Halogens are among the most active nonmetals due to their electron configuration and number of valence electrons.
How will you recognize that a single replacement reaction has occured when you combine an active metal with 6m hcl?
A single replacement or displacement reaction occurs when one ingredient in a compound replaces another. Only another metal can replace a less active one; a metal can only displace another metal, and a non-metal can only displace another non-metal.
Displacement reaction:The tendency of the element to lose electrons is what makes it metallic. Due to their bigger sizes and propensity to lose electrons as size, the number of shells, and nuclear force of attraction rise, the most active metals are found on the left side of the periodic table.
The reaction in which the more reactive element displaces the less reactive element is known as the displacement reaction.
When we combine an active metal with HCl, the reaction is as follows:
We are taking sodium, Na which is the most active metal. It will replace H in HCl because it is more reactive than H.
2Na + 2HCl → 2NaCl + H₂
Three ways to recognize if a single displacement reaction has taken place:
1. Color change
2. Formation of bubbles (a gas)
3. Formation of a precipitate
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When cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride, the major organic product is ________.
The primary organic product is a 1:1 mixture of enantiomeric ethers when cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride. The correct option is B.
What is cyclohexene?Cyclohexene is a hydrocarbon with the formula C₆H₁₀ . It has no color and a pungent scent. It is a necessary element in a number of industrial processes. It is not a stable compound.
One butadiene will exist in the s trans form rather than the s-cis form because the energy of s trans is lower than that of s-cis trans.
Thus, the correct option is B) a 1:1 mixture of enantiomeric ethers.
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The question is incomplete. Your complete question is given below:
A) a meso ether.
B) a 1:1 mixture of enantiomeric ethers.
C) a meso diol.
D) a 1:1 mixture of enantiomeric diols.
E) methoxycyclohexane.
In a solution, when the concentrations of a weak acid and its conjugate base are equal, ________.
I don't know the answer
In a solution, when the concentrations of a weak acid and its conjugate base are equal, the -log of the concentration of H+ and the -log of the Ka are equal.
What is Henderson-Hasselbalch equation ?This formula is frequently used to determine the pH of buffer solutions. A weak acid and its conjugate base make up buffer solutions.To find the pH of the buffer solution, we obtain the pKa of the weak acid and add it to the log of the concentration of the conjugate base divided by the concentration of weak acid. So whenever the concentration of the weak acid is equal to the concentration of the conjugate base, the pH of the buffer solution is equal to the pKa of the weak acid.To know more about buffer solutions you can refer to the link below:
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