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Chemistry
Olivia Mccullough
20 December, 21:48
Mass of oxygen gas needed to burn 37.5g of wax
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Amy Austin
21 December, 01:32
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Answer is: mass oxygen is 129,28 grams.
Chemical reaction: 2C₁₈H₃₈ + 55O₂ → 36CO₂ + 38H₂O.
m (C₁₈H₃₈) = 37,5 g.
n (C₁₈H₃₈) = m (C₁₈H₃₈) : M (C₁₈H₃₈).
n (C₁₈H₃₈) = 37,5 g : 254 g/mol.
n (C₁₈H₃₈) = 0,147 mol.
From chemical reaction: n (C₁₈H₃₈) : n (O₂) = 2 : 55.
n (O₂) = 4,04 mol.
m (O₂) = 4,04 mol · 32 g/mol.
m (O₂) = 129,28 g.
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