brittzabala92 brittzabala92
  • 23-10-2017
  • Chemistry
contestada

Calculate the number of grams of silane gas, SiH4, formed when 34.9 g of Mg2Si reacts with excess H2O.

Respuesta :

akiyama316
akiyama316 akiyama316
  • 04-11-2017
Mg2Si + 2H2O → 2Mg(OH)2 + SiH4

So, moles of Mg2Si = 34.9 / 76.7  = 0.455

So, mole of SiH4 form =  0.455   (according to the equation)

Mass of SiH4 =  0.455 x 32.12 = 14.6 g
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