Solving for grams (reaction problem)

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Science

Description

Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

(a) Write a balanced chemical equation for the reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)

(b) How many grams of calcium hydride are needed to form 6.491 g of hydrogen?

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Explanation & Answer

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a]CaH2(s)+2H2O=2H2 (g)+Ca(OH)2(s)




b]CaH2+2H and 2H2

40+2= 42 GRAM MES

H= 4 gram mes

42/  {6.491/4}

42/1.3

32 GRAMMES


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