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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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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