Step 1: Begin with a balanced chemical equation and starting amounts for each reactant.
Step 2: Convert mass of each starting reactants to moles.
Step 3: Calculate the number of moles used for each reactant. is the limiting reagent.
what is limiting reaction?
The limiting reactant (or limiting reagent) is the reactant that gets consumed first in a chemical reaction and therefore limits how much product can be formed.The reactant that is entirely used up in a reaction is called limiting reagent. In the reaction given above, 3 moles of Hydrogen gas are required to react with 1 mole of nitrogen gas to form 2 moles of ammonia.Determine which reactant is limiting by dividing the number of moles of each reactant by its stoichiometric coefficient in the balanced chemical equation. Use mole ratios to calculate the number of moles of product that can be formed from the limiting reactant.In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed.to know more about limiting reaction follow
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a gas mixture used for anesthesia contains 2.83 mol oxygen (o2), and 8.41 mol of nitrous oxide (n2o). the total pressure of the mixture is 192 kpa. what is the partial pressure of n2o?
partial pressure of n2o in the gas mixture was found to be 143.6 kPa
what is partial pressure?
Each gas that makes up a mixture of gases has a partial pressure, which represents the pressure that would exist if that gas alone had filled the complete volume of the initial mixture at the same temperature. According to Dalton's Law, the partial pressures of the individual gases make up the overall pressure of a perfect gas combination.
A gas's partial pressure is a gauge of its molecules' thermodynamic activity. However, unlike liquids or gas mixtures, gases behave differently depending on their partial pressures when dissolving, diffusing, and reacting. This characteristic of gases often holds true for gas chemical reactions in biology.
As per the data give
Moles (o2) = 2.83 mol
Moles (n2o) = 8.41 mol
Total pressure = 192 kPa
so the total number of moles should be calculated
Total No.of moles = no of moles in o2 + no of moles in n2o = 2.83 + 8.41 = 11.24 mol
mole fraction for n2o
Mole fraction = moles of compound/ Total moles
Mole fraction for n2o = 8.41 / 11.24 = 0.748
so now calculate the partial pressure of n2o
pn2o = 0.748 192 kPa
pn2o = 143.6 kPa
therefore the partial pressure of the n2o was 143.6 Kpa
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4
How do you write 880% as a fraction, mixed number, or whole number?
Submit
Explanation:
a fraction 880/1000 or 22/25
mixed number 44/5
whole number 8
Identify the calculations possible using only 28. 02 g/mol as a conversion factor.
The calculations possible using only 28.02 g/mol as a conversion factor are:
The grams of N2 in 5.03 x 10^20 moles of nitrogen gas.The moles of N2 in 3.94 grams of nitrogen gas.How to do the conversion in chemistry?One of many ways to do a conversion in chemistry is by using the conversion factor. It is an arithmetical multiplier for converting a quantity of a unit to the equivalent expressed in another.
Given the conversion factor of 28.02 g/mol (molar mass of nitrogen), we could calculate the grams of N2 in 5.03 x 10^20 moles of nitrogen gas. We also can calculate the moles of N2 molecules in 3.94 grams of nitrogen gas by using 28.02 g/mol as the conversion factor.
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you are working diligently in the chemistry laboratory when suddenly a small explosion occurs in the rear of the room, immediately and automatically capturing your attention. this is an example of
When you are working diligently in the chemistry lab, when suddenly a small explosion occurs in the rear of the room , immediately and automatically capturing your attention, this is an example of Reflexive attention.
What is reflexive attention?
Reflexive attention is essentially a semi-autonomous decision making system.
The brain regulates vital body functions such as heartbeat, movements and learning processes. Also, the brain controls the psychological processes such as memory, wakefulness, and attention.
Attention is categorized into two groups; voluntary and reflexive.
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please help!!
(this is Rutherford's Black box experiment)
- please answer all the questions in full sentences :D
- do not answer "i'm not sure" on here.
1) Suppose the marble usually rolled right to the end of the box without bouncing off anything, what would this tell you about the size of the targets?
2) What conclusions did Rutherford draw from his data and how did the data change the model of the atom?
3) Niels Bohr was a student of Rutherford, Bohr's work went on to modify the atomic model even more. What changes did Bohr make to advance our understanding of the atom?
Answers:
1) If the marble usually rolls right to the end of the box without bouncing off anything, this indicates that the size of the targets is appropriate for the marble.
2) Rutherford's data led him to conclude that atoms are mostly empty space, with a very small, very dense nucleus at the center. This data changed the model of the atom from a solid, indivisible sphere to a mostly empty space with a small, dense nucleus.
3) Bohr's model of the atom was an improvement on Rutherford's model. Bohr made the following changes:
proposed that electrons orbit the nucleus in discrete energy levelsexplained the stability of atoms by postulating that electrons can only occupy certain energy levelsproposed that when an electron jumps from one energy level to another, it emits or absorbs a photon with an energy equal to the difference in the energy levelsThese changes helped to explain the spectral lines of atoms and the stability of atoms.
What is the best use of probability in genetics?
A. To calculate the possible blood types of offspring
B. To exactly predict the the traits each offspring will have
C. To better parents' chances of having female or male offspring
D. To determine how many offspring parents will have
Answer: B
Explanation: Genetics has to do with genes, which is appearance, which is hereditary from the parent :)
1.96 g h2 is allowed to react with 9.78 g n2 , producing 1.46 g nh3 . part a what is the theoretical yield in grams for this reaction under the given conditions?
The theoretical yield in grams for this reaction under the given conditions is 11.05g.
What is theoretical yield?The theoretical yield is the greatest amount of a product that can be produced in a chemical reaction. It can be determined using the chemical equation with balance. the relative formula mass, mass, and mass of the limiting reactant, as well as the relative formula mass of the result
Given,
Mass of H₂ = 1.96 g
Mass of N₂ = 9.78 g
Molar mass of H₂ = 2 g/mol
Molar mass of N₂ = 28 g/mol
Lets calculate the moles of N₂ and H₂,
Moles of H₂ = [tex]\frac{given mass}{molar mass}[/tex]
H₂ = [tex]\frac{1.96}{2}[/tex]
H₂ = 0.98 mol
same for moles of N₂ = [tex]\frac{given mass}{molar mass}[/tex]
N₂ = [tex]\frac{9.78}{28}[/tex]
N₂ = 0.349 mol
Now, calculate limiting and excess reagent.
The balanced chemical equation is:
3H₂ + N₂ = 2NH₃
From the balanced reaction we conclude that.
As, 3 mole of H₂ react 1 mole of N₂
So, 0.98 moles of H₂ react with 0.98/3 = 0.32 moles of N₂
From this we conclude that, N₂ is an excess reagent because the given moles are greater than the required moles and H₂ is a limiting reagent and it limits the formation of product.
Let us calculate the moles of NH₃
From the reaction, we conclude that
As, 3 mole of H₂ react to give 2 mole of NH₃
So, 0.98 mole of H₂ react to give [tex]\frac{2}{3}[/tex]×0.98 = 0.65 mole of NH₃
Now we have to calculate the mass of NH₃
Mass of NH₃ = Moles of NH₃ × Moles of NH₃
Molar mass of NH₃ = 17 g/m
Mass of NH₃ = 0.65 × 17
Mass of NH₃ = 11.05g
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which compound has the shortest carbon-carbon bond length? which compound has the shortest carbon-carbon bond length? ch2ch2 ch3ch3 hcch all bond lengths are the same.
Out of all the compounds - ch2ch2 (Ethylene), ch3ch3 (Ethane)and hcch the compound with the shortest bond length is hcch (Ethyne)
Bond length is the equilibrium distance between the nuclei of two groups or atoms that are bonded to each other.
Bond length depends upon bond strength and is inversely proportional to it, therefore longer the length of bond, less the bond strength.
CH3-CH3 is Ethane, the C-C bond is a single bond.
CH2=CH2 is Ethylene, the C-C bond is a double bond.
CHCH is Ethyne, the C-C bond is a triple bond.
As we know, Bond length and bond strength gets shorter and stronger as the number of bonds between the two atoms increases. Here single bond has the largest bond length and triple has the shortest bond length.
So, in order of C-C bond length (longest to shortest) you have ethane > ethylene > ethyne
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what causes the lines in these spectra? why are the colors of the lines different? suggest a reason for the observation that the spectrum of calcium is more complicated than the spectrum of hydrogen.
Transitions of electrons within atoms or ions form spectral lines at different rungs which leads to emission of lines of different colors. Spectrum of calcium is more complicated than the spectrum of hydrogen because calcium atom have more electrons than hydrogen.
What are spectral lines?A spectral line in an otherwise smooth and continuous spectral is a dark or bright line resulting from the emission or absorption of light in a narrow frequency range compared to adjacent frequencies. Spectral lines are frequently used to identify atoms and molecules.
The spectral lines arise from electron transitions within an atom or ion. As electrons move toward or away from the nucleus (or ion) of an atom, they release or absorb energy in the form of light (or other radiation).Electrons fall on the lower rung and emit light with the energy of the rung difference. This allows different atoms to emit different colors of light.Calcium has a more complex spectrum. Because calcium has more electrons than hydrogen, there are more possible electronic states and transitions.To know more about spectral lines visit:
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2. 2.00 gram of a compound requires the following quantities of solvent to dissolve: 90.0 ml of water, 7.50 ml of chloroform, 32.0 ml of diethyl ether, or 85.0 ml of benzene. calculate the partition coefficient of the compound between chloroform and water, diethyl ether and water, and benzene and water. which solvent would you choose to extract the compound from an aqueous solution?
Partition coefficient Chloroform = 11.98, Diethyl Ether = 2.81 and Benzene = 1.05
Chloroform would be the ideal solvent to use when extracting the chemical from an aqueous solution because it has the highest solubility.
A solution is a homogenous mixture of one or even more solutes in a solvent. Adding sugar cubes to a cup of tea or coffee is an example of a solution. A property that facilitates the dissolution of sugar molecules is solubility. Solubility is the property of a substance (solute) to dissolve in a particular solvent. A solute is any solid, liquid, or gaseous substance that dissolves in a solvent.
The compound needs 2 grams of solvent to dissolve it.
Finding solubility
For water, 2g/90ml= 2.22
For chloroform, 2g/7.50= 26.6
For diethyl ether, 2g/32= 6.25
For benzene, 2g/85= 2.35
Partition Coefficients -
For chloroform = 11.98
For Diethyl Ether = 2.81
For Benzene = 1.05
As a result of its high solubility, chloroform would be used to extract a compound from an aqueous solution.
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a buffer is formed by adding 1.0 mol of methylamine, ch3nh2, and 1.0 mol of methylammonium, ch3nh3 , in a 1.0 l container. if a 10.0 ml sample of this buffer is diluted to 1000 ml with water, what is the ph of the diluted buffer? for methylamine, kb
If a 10.0 ml sample of this buffer is diluted to 1000 ml with water,the ph of the diluted buffer is 9.26.
pH of Buffer Solution can be calculated as :
pH = pKa - log ( [ Salt ] / [ Base ] )
Since Kb = 1.8 x 10-5
then , pKb = 4.74
Since , pKa + pKb = 14 \Rightarrow pKa = 9.26
Initial concentration of NH3 and (NH4)+ is 1 M.
Now 10 mL of the sample is taken and diluted to 1000 mL
Since , M1V1 = M2V2
Where M1 is the Molarity of the solution before dilution and V1 is the volume taken ( M1 = 1 M ; V1 = 10 mL)
M2 is the Molarity of the solution after dilution and V2 ( V2 =1000 mL ) is the Final volume of the solution.
M2 = M1V1 / V2 \Rightarrow M2 = ( 1 x 10 ) / 1000 = 0.01 M .
Final concentration of NH3 and (NH4)+ in the sample is 0.01 M.
then , [ Salt ] / [ Base ] = 1
Since , log( 1 ) =0
Then pH = pKa = 9.26
The pH of the Buffer solution is 9.26.
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The residents asked the town planners to propose some possible solutions that will address their transportation concerns and reduce the amount of CO2 released into the atmosphere. Of these, which is your favorite solution:
Question 3 options:
Restrict the use of private vehicles powered by fossil fuels on public roads.
Promote vehicles powered by renewable energy sources to harvest the crops and get them to market.
The solution for addressing transportation concerns and reducing the amount of carbon dioxide released into the atmosphere might include promoting vehicles powered by renewable energy sources to harvest the crops and get them to market (Option B).
What are renewable energy sources?The expression renewable energy sources make reference to different types of energy that replace the use of fossil based fuels in order to avoid the increase in the carbon dioxide level.
Therefore, with this data, we can see that renewable energy sources such as wind energy or solar energy replace fossil based fuels.
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a student places a piece of i2(s) in 50.0 ml of h2o(l), another piece of i2(s) of the same mass in 50.0 ml of c6h14(l), and shakes the mixtures. the results are shown above. what do the results indicate about the intermolecular interactions of the substances?
When a piece of I2 in 50 ml of water is placed then another piece of I2 of the same mass in C6H14 is placed then hydrogen bonding is formed in water and a strong London dispersion force occurs.
C6H14 is a straight chain alkane with 6 carbon atoms with no double or triple bond.this is non polar. So, London dispersion forces exist.this is the force that exists between all molecule.this is the weakest intermolecular forces.the boiling point of C6H14 increases as their atomic mass increases due to stronger London dispersion force.
Water has strong intermolecular forces.in this,hydrogen bonding and dipole moment created by the strong electronegative oxygen and hydrogen.water has hydrogen bond,dipole induced dipole forces and London dispersion forces.
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the pressure of a sample of argon gas was increased from 3.34 atm to 8.18 atm at constant temperature. if the final volume of the argon sample was 14.8 l, what was the initial volume of the argon sample? assume ideal behavior.
The initial volume of the argon gas sample at a constant temperature is 36.24 L.
Let the initial pressure and initial volume be P and V respectively
And the final pressure and volume be P' and V' respectively
At constant temperature, for the given sample,
P = 3.34 atm
V = ?
P' = 8.18 atm
V' = 14.8 L
The ideal gas law is PV = nRT,
At constant T (temperature), PV = constant
According to Boyle's law, the product of the pressure and volume of an ideal gas at constant temperature is constant.
For ideal gas argon at a constant temperature, using Boyle's law we get
P * V = P' * V'
3.34 * V = 8.18 * 14.8
V = 121.06 / 3.34
∴ V = 36.24 L
Thus at 3.34 atm and constant temperature, the volume of a sample of agon gas is 36.24 L
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Which statement correctly describes the bonding in metals? * (1 Point)
A) lattice of negative ions in a sea of electrons
B) lattice of positive ions in a sea of electrons
C) lattice of neutral atoms with delocalised electrons.
D) lattice of negative ions with delocalised electrons.
Answer:
C) lattice of neutral atoms with delocalised electrons
Explanation:
Fact 1: metals are elements and therefore they contain atoms that are electrically neutral
Fact 2: in all atoms, the electrons are delocalised/ are free moving electrons (as the electrons serve their purpose in different forms depending whether you look at it the chemistry way or physics way)
metals are solid and hence they have a lattice structure
(tho at my school we focus on giant ionic lattice structure when explaining based on ionic compounds so i can't guarantee that 'giant ionic lattice structure' and 'lattice structure' are the same, hence i just stick with lattice structure for this explanation ^^)
explanation for other options:
they said negative/positive ions which is not true since atoms are electrically neutral
only when the atoms undergo chemical reactions will they be charged
determine the empirical formula of a mineral having the percent composition: 28.59% o, 24.95% fe, 46.46% cr.
The empirical formula of a mineral is FeCr2O4.
What is known as empirical formula?
The definition of an empirical formula for a compound is one that displays the ratio of the components present in the complex but not the precise number of atoms in the molecule. Subscripts are used next to the element symbols to indicate the ratios.
Explanation:
[tex]O: 28.59 g x 1 mole O/16 g = 1.79 moles OFe: 24.95 g x 1 mole/55.8 g = 0.447 moles FeCr: 46.46 g x 1 mole/52 g = 0.893 moles CrDividing through by 0.447 one gets 4O, 1Fe and 2CrEmpirical formula = FeCr2O4[/tex]
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The ratio between the components is the empirical formula. Presented as; FeCrO₃.
Why is the empirical formula?Typically, the equation is used to only show the components of a molecule. When one wishes to rapidly identify the elements they are working with, this is helpful. When you want to learn how many atoms of each element are present in the molecule, the chemical formula is the most helpful.
Briefing:Divide the percentage composition by the atomic mass of the elements
Fe =24.95 / 55.845 = 0.4467
Cr = 46.46 / 51.9961 = 0.8935
O = 28.59 / 16 = 1.78
Step 2:
Divide all though by the smallest number (0.4467)
Fe = 0.4467 / 0.4467 = 1.002
Cr = 0.8935 / 0.4467 = 1
O = 1.78 / 0.4467 = 3.038
The ratio between the components is the empirical formula. Presented as; FeCrO₃
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(c) Lithium oxide is an ionic compound.
Draw a dot and cross diagram to show how lithium and
oxygen combine to form lithium oxide.
Only show the electrons in the outer shell of each
atom.
Give the charges on the ions formed.
Answer:
Let us know formula and denotion for Lithium oxide is Li2O.
Explanation:
While on the basis of Electronic configuration:
Lewis structure(for Lithium atom)-Li•
For Oxygen atom- it is 6 dots in the Word O(for Oxygen) but is needed to paired in a pair(of two dots if possible) by the use of either all sides where two dots are presented two sides While one dot is represented on other two sides.
When we come across we might have a simple question how and why the Lithium oxide is Li2O
So,as we know Li(have one electron in its outermost shell),written as Li^+/+1 While Oxygen requires 2 more electrons to stabilize its valency,so it written as O^-2/2-
On combining,Li^+ & O^-2
Exchange and crossing up of valency is done forming Li2O.
Do check the image uploaded for better clarity and understanding.
describe the experimental method through which you determine the appropriate wavelength for an analyte
Wavelength is chosen by analyzing the spectrogram.
Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.
A spectrogram gives a going for walks show of a sound signal because it takes place in real time, a spectrum, however, offers us a photograph of the sound at a particular factor in time. A spectrum can permit you to see.
Spectrograms map out sound in a comparable way to a musical rating, only mapping frequency rather than musical notes. Seeing frequency energy allotted over the years in this manner allows us to genuinely distinguish each of the sound factors in a recording, and their harmonic shape.
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Replace this sample text with the prompt or directions for this item.
The atomic number of an element is the number of
The atomic mass is the number of
The electrons in the outermost shell are known as the
protons protons and neutrons
valence electrons
Answer:
1. Protons
2. Protons and Neutrons
3. Valence electrons
Explanation:
(1) what is the complete ground state electron configuration for the nitrogen atom? (2) what is the complete ground state electron configuration for the vanadium atom?
The ground state electronic configuration of Nitrogen atom is 1s²2s²2p³
The ground state electronic configuration of vanadium atom is 1s²2s²2p⁶3s²3p⁶4s²3d³
What is electronic configuration?Electron configuration is the distribution of electrons within an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s²2s²2p⁶. This means that the 1s, 2s and 2p subshells have 2, 2 and 6 electrons respectively.
The electronic configuration of a type of atom (neutral or ionic) allows us to understand the shape and energy of its electrons. Many general rules are followed in assigning an electron's "position" to its possible energy states, but these assignments are arbitrary and it is always unknown which electron is being described. Knowing the electronic configuration of a species allows us to better understand its binding ability, magnetism and other chemical properties.
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how many grams of water ( h2o ) have the same number of oxygen atoms as 9.0 mol of oxygen gas? express your answer in grams.
162 grams of water have the same no. of oxygen atoms as 9.0 mol of oxygen gas.
1 mol of oxygen contains 6.023 * 10 [23] oxygen atoms.
That means 9.0 mol of oxygen gas is equals to 9*6.023*10[23] oxygen atoms .
To calculate the grams of water which will have 9*6.023*10[23] atoms of oxygen.
We have to know that in 18gms of water 1 oxygen atom is present.
So, for 9 oxygen atoms we will multiply with 18 that is 162 gms.
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13. Identify two elements on Mendeleev's table that combines with oxygen in the same ratio
as magnesium.
14. Identify one characteristic used by Mendeleev to develop his classification system of
the elements.
15. State one difference between Mendeleev's Table and the Modern Periodic Table.
Two elements on Mendeleev's table that combines with oxygen in the same ratio as magnesium are Beryllium and Calcium.
They form in a ratio of 1:1 with oxygen.
What is the reason behind Berylium and Calcium in the ratio of 1:1 with oxygen?
The one-to-one charge ratio results in the formula CaO. Calcium and Oxygen have iconic bonding because calcium loses two electrons and oxygen gains two to complete their octet.
BeO can be produced by the reaction between beryllium and oxygen .In this reaction , each Be atom loses its two valence electrons to 0 atoms , forming Be2+ions and O2- ions. The electrostatic attraction between the oppositely charged ions forms the iconic bond .
One characteristic used by Mendeleev to develop his classification system of the elements:
Mendeleev was directed by two variables: Expanding nuclear masses, and Gathering of components having comparative properties. Mendeleev thought about formulae of hydrides and oxides as one of the fundamental models for order, among substance properties.
One difference between Mendeleev's Table and the Modern Periodic Table is :
Mendeleev's periodic table is based on atomic mass whereas +The modern periodic table is based on the atomic number.
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what three flaws of the traditional periodic table does jeff moran feel he has addressed with his periodic spiral
The three major flaws addressed by Moran's periodic spiral are:
1) Since hydrogen possesses distinct attributes that set it apart from every other element in the table, it effectively does not belong to any of the table's 18 columns.
2) The lanthanides and actinides, which are the elements from each period of the f block, have comparable properties but are not shown in columns in the table.
3) The column-and-row layout of the periodic table hides the continuity between the pieces, which is better represented by an a spiral.
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what is the heat of a reaction, in joules, with a total reaction mixture volume of 70.6 ml if the reaction causes a temperature change of 6.1 oc in a calorimeter? assume that the reaction mixture has a density of 1.00 g/ml and a specific heat of 4.184 j/g-oc. the calorimeter has a heat capacity of 10.0 j/oc.
With density 1.00 g/ml and a specific heat of 4.184 j/g we can see that the heat of the chemical reaction in joules is H = 1,596 J
We are given
Total volume of the mixture = 70.6 ml
Change in temperature = 6.1 °C
Density of reaction mixture = 1.00 g/ml
Specific heat of water = 4.184 J/g = 4200 J/Kg
Now Density = mass/volume
Mass of water = Density × volume
Mass of water = 1 g/mL × 62.3 mL
Now in order to find heat in joules, let's use the formula.
H = mcθ
m = mass of water
c = heat capacity of water
θ = temperature rise
Now substituting the values we get
H = 0.0623 Kg × 4200 J/Kg × 6.1 °C
H = 1,596 J = 1.5 KJ
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silicon dioxide is found in sand, quartz glass, and silica gel packets found in packaging of shoes and electronics. what is the formula for silicon dioxide?
Silicon dioxide is found in sand, quartz glass, and silica gel packets found in packaging of shoes and electronics. the formula for silicon dioxide is SiO₂.
The formula for silicon dioxide is SiO₂. silicon dioxide is called as silica. silicon dioxide is commonly found in quartz. it is transparent solid. it is used in adhesives, ceramics. it is also used in agriculture chemicals. white and whitish yellow as sand or powder. it is the main part in optical fiber.
Thus, Silicon dioxide is found in sand, quartz glass, and silica gel packets found in packaging of shoes and electronics. the formula for silicon dioxide is SiO₂.
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the reaction between copper and silver nitrate produces beautiful silver flakes and a bright blue copper (ii) nitrate solution according to the following reaction: cu 2agno3 2ag cu(no3)2 how many moles of agno3 will be needed to completely react with 10.0 g of cu?
0.3147128245 moles of AgNO₃ will be needed to completely react with 10.0 g of Cu.
Determine the number of moles of copper by dividing its mass by its molar mass.
moles Cu = mass Cu / MM Cu
moles Cu = 10.0 g/ 63.55 g/mol
moles Cu = 0.1573564123
Based on the balanced chemical reaction between copper and silver nitrate, 1 mole Cu needs 2 moles AgNO₃ to proceed with the reaction completely.
Cu + 2AgNO₃ ⇒ 2Ag + Cu(NO₃)₂
If there are 0.1573564123 moles Cu, then 0.3147128245 moles AgNO₃ is needed.
moles AgNO₃ = 0.1573564123 moles Cu(2 moles AgNO₃ / 1 mole Cu)
moles AgNO₃ = 0.3147128245
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7. How many moles are 1.20 x 1025 molecules of calcium chloride?
Answer: 6.022 x 10²³ units
Explanation:
One volume of chlorine gas measured at STP would be liberated by the current of 2.5 ampere flowing for a period of 1.8 hours through an aqueous solution of silver chloride
The volume of chlorine gas produced at STP by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride is 1.504 L.
What are the moles of chorine gas that are liberated at STP by passing a given current through an electrolyte containing chloride ions?The moles of chorine gas that are liberated at STP by passing a given current through an electrolyte containing chloride ions is determined from the equation of the oxidation reaction that occurs when chlorine gas is liberated from chloride ions.
The equation of the oxidation reaction is given below:
2 Cl⁻ ---> Cl₂ (g) + 2 e
From the equation of reaction, two moles of electrons liberated 1 mole of chlorine gas.
The volume of 1 mole of chlorine gas = 22.4 L
Quantity of current in 2 moles of electrons = 2 * 96500 C
Quantity of current in 2 moles of electrons = 193000 C
Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 2.5 * 1.8 * 3600
Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 12960 C
The volume of chlorine gas produced = 12960 * 22.4/1930000
The volume of chlorine gas produced = 1.504 L
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Complete question:
What volume of chlorine gas measured at STP would be liberated by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride?
How many spaces have been left for the possible discovery of new elements?
this is the answer to ur question hope is helpful
assume that coal can be represented by the chemical formula c135h96o9ns . if 2.00 tons of coal is burned, what mass of nitrogen in the form of nox gases, is produced by this combustion?
If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.
The chemical reaction equation can be written as
C135H96O9NS + 156O2 ------- 135CO2 + 48H2O + NO + SO2
Mass of 2.0 tons of coal in gram = 1.814 × 10^(6) g
Molar mass of C135H96O9NS can be calculated as = 135(12) + 96(1) + 14 + 32 = 1904 moles of coal
Now, number of moles of coal burned = 1.814 × 10^(6) g / (1906 g/mol) = 952.7 moles of coal
If 1 mole of coal produced 1 mole of NO
Total 952.7 moles of coal produced 952.7 moles of NO
Mass of NO can be calculated as
Mass of NO produced = 952.7 × 30 = 28581 g
1 mole of NO = 30 g of NO
Thus, 14 g of nitrogen is contained in 30 g of NO
Let xg of nitrogen is contained in 28581 g of NO
Then,
x = 14 × 28581 = 400134 g of nitrogen.
If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.
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