1. Using the following equation: Fe2O3 + 3 H2 > 2 Fe + 3 H2O

Calculate how many grams of iron can be made from 16.5 grams of Fe2O3 by the following equation.
2.Using the following equation:

4 NH3 + 5 O2 > 4 NO + 6 H2O

How many grams of oxygen (O2) are needed to react with 56.8 grams of ammonia by this reaction?
3. Using the following equation:

Sn + 2HF > SnF2 + H2

a) How many grams of SnF2 are produced from the reaction of 30.0 g of HF?
b) How many moles of HF will be needed to react with 48 grams of Tin, (Sn)?