Calculate number of moles of H2(g) using the Ideal Gas Equation:
Calcium hydride, CaH2, reacts with water to form hydrogen gas:
CaH2(s) + 2H2O(l) → Ca(OH)2(aq) + 2 H2(g)
This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired.
How many grams of CaH2 are needed to generate 146 L of H2 gas if the pressure of H2 is 826 torr at 22 oC?
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