Calcium hydride, $Ca{H}_2,$ reacts with water to form hydrogen

gas:

$Ca{H}_2(s)+2H_{2}O(l)Ca(OH{)}_2(aq)+2H_2(g)$

This reaction is sometimes used to inflate life rafts, weather

balloons, and the like, where a simple, compact means of

generating $H_2$ is desired.

Part A

How many grams of $Ca{H}_2$ are needed to generate $146L$ of $H_2$ gas if the pressure of $H_2$ is $110$kPa at $22C?$

Express your answer using three significant figures.