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Дано

w(C) = 83.3% = 0.833

CxHy

y = 2x + 2

Решение

w(C) = xAr(C) / (xAr(C) + yAr(H)) = 12x / (12x + y) = 0.833

12x / (12x + y) = 0.833

12x = 0.833 (12x + y)

12x = 10x + 0.833y

12x = 10x + 0.833(2x + 2)

2x = 1.666x + 1.666

0.344x = 1.666

x = 5

y = 2x + 2 = 2 * 5 + 2 = 12

Ответ: C5H12