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luda_lava [24]
3 years ago
5

How many grams of calcium hydride are needed to form 4.550 g of hydrogen gas

Chemistry
1 answer:
stealth61 [152]3 years ago
4 0
Molar mass 

CaH₂ = 42.0 g/mol

H₂ = 2.0 g/mol

<span>Balanced chemical equation :

</span>CaH2 + 2 H₂O = Ca(OH)₂ + 2 H₂

42.0 g CaH₂ ---------------------  4.0 g H2
    ? g CaH₂ ---------------------- 4.550 g H2

mass = 4.550 * 42.0 / 4

mass = 191,1 / 4

mass =<span> 47.775 g of CaH₂</span>

<span>hope this helps!</span>
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