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Calcium hydride, CaH2, reacts with water to form hydrogen gas: How many grams of CaH2 are needed to generate 147L of H2 gas if the

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Calcium hydride, CaH2, reacts with water to form hydrogen gas: How many grams of CaH2 are needed to generate 147L of H2 gas if the pressure of H2 is 825 torr at 22C ? CaH2(s)+2H2O(l)Ca(OH)2(aq)+2H2(g) Express your answer using three significant figures. This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired

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