Unit 2 Section C



Unit 2 Section C- Molar Relationships Name_________________

Worksheet 8

1. For the reaction: Fe3O4 + 4 CO → 3 Fe + 4 CO2

a. What mass of Fe can be produced from the complete reaction of 4.0 mole CO?

Assume adequate amount of Fe3O4.

b. How many moles of CO2 can be produced from 25.0 g Fe3O4? Assume there is

excess CO available for the reaction.

c. What mass of CO, which fully reacts, will produce 210.0 g Fe?

2. Tungsten can be prepared from one of its minerals as illustrated in the following

equation:

WO3 + 3 H2 → W + 3 H2O

a. What mass of H2O can be produced from the complete reaction of 100.0 g WO3,

given excess of hydrogen?

b. What mass of H2 is needed to produce 7.5 moles W?

c. How many moles of W can be produced from the complete reaction of 2.7 moles

WO3, assuming excess H2?

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