0
first you set up your ratio;
9.3moles
1mole = 32g
9.3 is the number of moles you're trying to find
32 comes from adding the mass numbers of both elements;
Si=28g
H=1g, but there's four, so you multiply it by 4, hence the 32
now you crossmultiply; so multiply 9.3 by 32
you get 297.6, then divide by 1 so 9.3 moles SiH4 is 297.6g. follow the same pattern every time and you'll be fine; hope this helps
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoThe molar mass of SiH4 is approximately 32.117 grams per mole. So, 9.30 moles of SiH4 has a mass of 298.69 grams.
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