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WorksheetsRegents Chemistry Stoichiometry
Total questions: 25
Worksheet time: 50mins
Given the following chemical equation:
4 Al + 3 O2 → 2 Al2O3
How many moles of aluminum oxide will be produced if 12 moles of aluminum are consumed?
12
4
8
6
Given the following chemical equation:
CH4 + 2 O2 → 2 H2O + CO2
How many moles of oxygen must be consumed in order to produce 5 moles of carbon dioxide.
10
5
8
15
Given the following chemical equation:
2 Al + 3 CuCl2 → 3 Cu + 2 AlCl3
How many moles of copper (II) chloride must be consumed in order to produce 12 moles of aluminum chloride?
14
6
12
18
In the reaction
2RbNO3 → 2RbNO2 + O2
how many moles of O2 are produced when 5.0 mol of RbNO3 decompose?
1.0 mol
2.5 mol
3.0 mol
7.5 mol
Given the equation
N2 + 3H2 --> 2NH3
what is the total number of moles of NH3 produced when 10 moles of H2 reacts completely with N2?
6.7
2.0
3.0
15.0
What is the mole ratio of H2O to H3PO4 in the following chemical equation?
P4O10 + 6 H2O --> 4 H3PO4
6:4
4:6
1:3
3:1
Balance the following reaction and determine the mole ratio
CaC₂(s) + H₂O(l) ---> C₂H₂(g) + Ca(OH)₂(aq)
1:2 --> 2:2
1:2 --> 1:1
2:1 --> 1:1
2:1 --> 2:1
How many moles of water can be produced if 8 moles H2 are used?
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
For the Balanced Reaction:
3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe
What is the ratio of moles of MgO to moles Fe?
3 mol Mg : 2 mol Fe
2 mol Mg : 3 mol Fe
1 mol Fe : 2 mol Fe
3 mol MgO : 2 mol Fe
In the equation
2Al2O3 --> 4Al + 3O2
what is the mole ratio of aluminum to oxygen?
10:6
3:4
4:3
2:3
Given the equation
2Na + S -->Na2S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?
1
2
0.5
4
Given the equation
4NH3 + 5O2-->4NO + 6H2O
What is the total number of moles of H2O produced when 12 mole of NH3 is completely consumed?
15
18
20
24
How many cars can you make with 92 tires and 34 bodies?
Given the equation
2KClO3 → 2KCl + 3O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
6.7 mol
1.0 mol
10.1 mol
4.5 mol
In the reaction
2H2 + O2 → 2H2O
what is the mole ratio of oxygen to water?
1:2
2:1
3:4
4:3
What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
Mole ratios are obtained from a
balanced chemical equation
periodic table
molar mass
2KClO3 → 2KCl + 3O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
6.7 mol
1.0 mol
10.1 mol
4.5 mol
