1. According to the equation shown below, how many grams of oxygen are required to react with 9.0 grams of C2H6?
2 C2H6 + 7 O2 ---> 4 CO2 + 6 H2O
2. If 3.00 grams of calcium are allowed to react with 2.00 grams of fluorine, what mass of CaF2 would be formed?
Ca + F2 ---> CaF2
3. If 0.75 moles of Si is allowed to react with an excess of nitrogen, how many moles of Si3N4 will be produced?
3 Si + 2 N2 ---> Si3N4