помогите химия пожалуйста​

Ответ:

а)M(C4H9OH) = 74 g/mol

б)M(C6H5OH) = 94 g/mol

в)M(CH3OH) = 32 g/mol

г)M(NH2CH2COOH) = 75 g/mol

В - А - Г - Б

дано

W(C) = 40%

W(H) - 6.7%

D(H2) = 15

-----------------

CxHyOz - ?

W(O) = 100% - (W(C) + W(O)) = 100 - (40+6.7) = 53.3%

M(CxHYOz) = D(H2) * 2 = 15*2 = 30 g/mol

n(C) = 40 / 12 = 3.33 mol

n(H) = 6.7 / 1 = 6.7 mol

n(O) = 53.3 / 16 = 3.33 mol

n(C) : n(H) : n(O) = 3.33 : 6.7 : 3.33 = 1 :2 :1

CH2O

HCOH

M(HCOH) = 30 g/mol

ответ HCOH

Объяснение: