17 April, 01:02
What is the mass of carbon in 500. g of octane?
17 April, 02:44
The answer is: the mass of carbon is 420.6 grams.
m (C₈H₁₈) = 500 g; mass of octane.
M (C₈H₁₈) = 114.22 g/mol; molar mass of octane.
n (C₈H₁₈) = m (C₈H₁₈) : M (C₈H₁₈).
n (C₈H₁₈) = 500 g : 114.22 g/mol.
n (C₈H₁₈) = 4.38 mol; amount of octane.
In one molecule of octane, there are eight carbon atoms:
n (C) = 8 · n (C₈H₁₈).
n (C) = 8 · 4.38 mol.
n (C) = 35.02 mol; amount of carbon.
m (C) = 35.02 mol · 12.01 g/mol.
m (C) = 420.6 g; mass of carbone.
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