How many grams of calcium hydroxide is formed when 100 g of calcium interacts with water?

How many grams of calcium hydroxide is formed when 100 g of calcium interacts with water? what is the volume of hydrogen released in this case.

Given:
m (Ca) = 100 g

To find:
m (Ca (OH) 2) -?
V (H2) -?

1) Ca + 2H2O => Ca (OH) 2 + H2 ↑;
2) n (Ca) = m / M = 100/40 = 2.5 mol;
3) n (Ca (OH) 2) = n (Ca) = 2.5 mol;
4) m (Ca (OH) 2) = n * M = 2.5 * 74 = 185 g;
5) n (H2) = n (Ca) = 2.5 mol;
6) V (H2) = n * Vm = 2.5 * 22.4 = 56 liters.

Answer: The mass of Ca (OH) 2 is 185 g; volume H2 – 56 l.