Решить второе , если конечно поймёте язык. это , если что) заранее большое

С2Н6О

Объяснение:

M (вещества) = D(по Н2) * M(Н2)= 23г/моль * 2моль = 46г/моль

n (вещества) = m/M = 2,3г / 46г/моль = 0,05моль

n(CO2) = m/M = 4,4г / 44г/моль =0,1моль

n(C) = n(CO2) = 0,1моль

n(H2O) = m/M = 2,7г / 18г/моль = 0,15моль

n(H) = n(H2O) * 2 = 0,15моль * 2 = 0,3моль

m(O) = m(вещества) - ( m(H) + m(C) ) = 2,3г - (0,3моль * 1г/моль + 0,1моль * 12г/моль) = 0,8г

n (O) = m/M = 0,8г / 16г/моль = 0,05 моль

n(вещества) : n(С) : n(Н) : n(O) = 0,05моль : 0,1моль : 0,3моль : 0,05 = 1 : 2 : 6 : 1

ответ: С2Н6O

Можно проверить M(С2Н6О) = M(C) + M(H) + М(О) = 2*12г/моль + 6г/моль + 16г/моль = 46 г/моль

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