Question

Dos seguintes compostos, qual
apresenta massa molecular igual a 30
g/mol? (Dados: Massas atômicas: C =
12 g/mol, H = 1 g/mol, N = 14 g/mol, P = 31 g/mol e O = 16 g/mol)
a) C2H6
b) PH3
c) NH3
d) NO2
e) N203​

Answer 1

Resposta:a) C2H6

Explicação:

a) C2H6 --->12.2+1.6--->24+6---->30 g/mol

b) PH3--->31.1+1.3--->31+3--->34 g/mol

c) NH3---->14.1+1.3--->14+3--->17 g/mol

d) NO2 --->14.1+16.2-->14+32--->46 g/mol

e) N2O3​--->14.2+16.3-->28+48--->76 g/mol