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What is the mass of nh3 in a 80.0-cm3 sample that has a density of 0.92 g/cm3 and consists of 20% (by mass) nh3?
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What is the mass of nh3 in a 80.0-cm3 sample that has a density of 0.92 g/cm3 and consists of 20% (by mass) nh3?

User Superkhau
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1 Answer

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d = m/V
m = d×V
m = 0,92×80
m = 73,6g

73,6g --- 100%
Xg ------- 20%
X = (73,6×20)/100 = 73,6×0,2 = 14,72g NH₃

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