CH3 O
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а) СН3 - СН2 - С - С - Н
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CH3
CH3 O
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б) CH3 - CH2 - CH - C - C - H
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CH3 CH3
O
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в) CH3 - CH - CH2 - CH - C - H
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CH3 CH3
O
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г) CH3 - CH - CH2 - C - H
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CH3
1)
Дано
w(C) = 83.3% = 0.833
D(CO2) = 1.636
Решение
D(CO2) = M(CxHy) / M(CO2) = M(CxHy) / 44
1.636 = M(CxHy) / 44
M(CxHy) = 72 г/моль
x = (Mr(CxHy)w(C)) / Ar(C) = (72 * 0.833) / 12 = 5
y = (Mr(CxHy) - xAr(C)) / Ar(H) = (72 - 60) / 1 = 12
ответ: C5H12
2)
Дано
w(H) = 17% = 0.17
D(O2) = 1.81
Решение
D(O2) = M(CxHy) / M(O2) = M(CxHy) / 32
1.81 = M(CxHy) / 32
M(CxHy) = 58 г/моль
y = (Mr(CxHy)w(H)) / Ar(H) = (58 * 0.17) / 1 = 10
x = (Mr(CxHy) - yAr(H)) / Ar(C) = (58 - 10) / 12 = 4
ответ: C4H10
3)
Дано
w(C) = 82% = 0.82
D(H2) = 22
Решение
D(H2) = M(CxHy) / M(H2) = M(CxHy) / 2
22 = M(CxHy) / 2
M(CxHy) = 44 г/моль
x = (Mr(CxHy)w(C)) / Ar(C) = (44 * 0.82) / 12 = 3
y = (Mr(CxHy) - xAr(C)) / Ar(H) = (44 - 36) / 1 = 8
ответ: C3H8
