WorksheetsMole to Mole and Mass to Mass Stoichiometry
Total questions: 15
Worksheet time: 15mins
If a chemical reaction involving substance A and B stops when substance B is completely used up, then substance B is referred to as the
excess reactant.
limiting reactant.
primary reactant.
primary product.
Which of the following would be investigated in reaction stoichiometry?
the types of bonds that break and form when acids reacts with metals
the mass of potassium required to produce a known mass of potassium chloride
the amount of energy released in chemical reactions
the mass of hydrogen and oxygen in water
Which of the following cannot be determined from the pictured equation?
Moles of a product produced from a given amount of reactant.
Mass of a product produced from a given amount of reactant.
Number of atoms or molecules produced from a given amount of reactant.
The volume of a liquid produced from a given amount of reactant
In solving a mass-mass (gram to gram) conversion, it is necessary to convert to the given mass to moles.
true
false
When calculating the molar ratio, we use the
Coefficients
Limiting Reagent
subscripts
subscripts
What is the molar ratio between hydrochloric acid and hydrogen?
mol HCl : 2 mol H2
mol Zn : 1 mol ZnCl2
2 mol HCl : 1 mol H2
2 mol Zn : 1 mol H2
What is the molar ratio between oxygen and carbon dioxide?
2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O
10 mol O2 : 8 mol CO2
5 mol O2 : 4 mol CO2
1 mol O2 : 2 mol H2O
What is the molar ratio between oxygen and magnesium oxide? 2 Mg + O2 -> 2 MgO
2 mol Mg : 2 mol MgO
1:2
1 mol O2 : 2 mol MgO
2 mol Mg : 1 mol O2
What is the molar ratio between sodium hydroxide and hydrogen?
1 mol NaOH : 1 mol H2
2 mol NaOH : 1 mol H2
1 mol Na : 1 mol H2
2 mol Na : 1 mol H2
Using the balanced chemical equation:
Mg + 2 HCl --> MgCl2 + H2
How many grams of MgCl2 is produced if 4.67 moles of HCl react?
219 g MgCl2
4.67 g MgCl2
94 g MgCl2
Using the balanced chemical equation: 4NH3 + 3O2 --> 2N2 + 6H2O Determine the amount of grams of N2 is produced if 4.03 moles of NH3 react?
28.0 g N2
56.4 g N2
2.02 g N2
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Ethane (C2H6) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?
In a chemical reaction, if 2 moles of hydrogen gas react with 1 mole of oxygen gas to produce water, what is the mole ratio of hydrogen to water?
A) 1:1
B) 2:1
C) 1:2
D) 2:2
If 10 grams of calcium carbonate (CaCO3) decompose to form calcium oxide (CaO) and carbon dioxide (CO2), how many grams of calcium oxide are produced? (Molar mass of CaCO3 = 100 g/mol, CaO = 56 g/mol)
A) 5.6 g
B) 10 g
C) 5 g
D) 56 g
In the reaction 2 Al + 3 Cl2 -> 2 AlCl3, how many moles of AlCl3 are produced from 4 moles of Al?
A) 2 moles
B) 4 moles
C) 6 moles
D) 8 moles
