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Problem: 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?

FREE Expert Solution

Calculate number of moles of H2(g) using the Ideal Gas Equation:

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Problem Details

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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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.

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