1. The exothermic reaction between liquid hydrazine (N2H2) and liquid hydrogen peroxide (H2O2) is used to fuel rockets. The products of this reaction are nitrogen gas and water. A. Write the balanced chemical equation.
B. How many grams of hydrazine are needed to produce 10.0 mol nitrogen gas?

2. Aluminum reacts with chlorine to produce aluminum chloride. Determine the mole ratio necessary to convert moles of aluminum to moles of aluminum chloride.

3. How many moles of cesium xenon heptafluoride (CsXeF7) can be produced from the reaction of 12.5 mol cesium fluoride with 10.0 mol xenon hexafluoride? CsF (s) + XeF6 (s)  CsXeF7 (s)

4. Lead(II) oxide is obtained by roasting galena, lea(II) sulfide, in air.
PbS (s) + O2 9g)  PbO (s) + SO2 (g)
A. Balance the equation and determine the theoretical yield of PbO if 200.0 g PbS is heated.
B. What is the percent yield if 170.0 g PbO is obtained?