Chemistry 2015-2016
Using the Mole Ratio
Name:
Date:
Per:
Directions: Use the given moles of substance in the problem and the mole to mole ratio to determine the
number of moles or grams for the reactant or product named in the problem.
1. How many moles of HCl are needed to react with 5.70 moles of Zn, according to the following
equation? 2 HCl + Zn → ZnCl2 + H2
a. Substance and amount given: 5.70 moles of Zn
b. Substance you are solving for: moles of HCl
c. Mole to mole ratio (top number will be substance in answer, bottom number will be substance
you are given)
2 moles HCl
1 mole Zn
d. Solution (show work) and circle answer.
2. How many moles of NaCl form when 7.4 moles of NaClO decomposes according to the following
equation: 3 NaClO → 2 NaCl + NaClO3?
a. Substance and amount given: _______ moles of ______
b. Substance you are solving for: moles of ______
c. Mole to mole ratio:
moles
moles
d. Solution (show work) and circle answer.
3. How many moles of AlF3 will form when 25 moles of H2O form according to the following equation
(balance first!): _____ Al2O3 +_____ HF → _____ AlF3 +_____ H2O
4. What mass of O2 will react with 0.638 moles of Fe according to the following equation (balance
first!): ______ Fe + ______ O2 → ______ Fe2O3