Chapter 7.7, Problem 7.58QAP

Calcium cyanamide, ${\text{CaCN}}_{\text{2}}$ , reads with water to form calcium carbonate and ammonia.
${\text{CaCN}}_{\text{2}}\left(s\right)+{\text{ 3H}}_{\text{2}}\text{O}\left(l\right)\to {\text{CaCO}}_{\text{3}}\left(s\right)+{\text{ 2NH}}_{\text{3}}\left(g\right)$

a. How many grams of ${\text{H}}_{\text{2}}\text{O}$ are needed to react with 75.0 g of ${\text{CaCN}}_{\text{2}}$ ?
b. How many grams of ${\text{NH}}_{\text{3}}$ are produced from 5.24 g of ${\text{CaCN}}_{\text{2}}$ ?
c. How many grams of ${\text{CaCO}}_{\text{3}}$ form if 155 g of ${\text{H}}_{\text{2}}\text{O}$ reacts?