Respuesta :

Willchemistry
Molar mass

CaH₂ = 42.0 g/mol

H₂ = 2.0 g/mol

Balanced chemical equation :

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 = 47.775 g of CaH₂

hope this helps!

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