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.

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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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