1. Consider the generic reaction: A + 2B→ C
How many moles of C are formed upon the complete reaction of:
A. 5.0 moles of A
B. 5.0 moles of B
2. For the reaction: 2N2O5 → 4NO2 + O2
Calculate how many moles of NO2 form when each amount of the reactant completely reacts.
A. 1.3 moles N2O5
B. 1.006x10-3 mole N2O5
3. For the reaction: 2S + 3O2 → 2SO3
A. Calculate the moles of S needed to completely react with 1.75 moles of O2
B. Calculate the moles of product that form when 1.75 moles of O2 completely reacts. Assume there
is more than enough S.
4. For the reaction: 2S + 3O2 → 2SO3
A. Calculate the mass of S (32.07 g/mol) needed to completely react with 5.3 g of O2 (32.00 g/mol).
B. Calculate the mass of SO3 (80.07 g/mol) that form when 5.3 g of O2 completely reacts. Assume
there is more than enough S.
5. A mixture containing 21 moles of F2 and 8 moles of S is allowed to react according to the reaction:
3F2 + S → SF6
A. What is the limiting reactant?
B. How many moles of the excess reactant remain after all of the limiting reactant reacted
completely?
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