Question

1. Calcule a massa molar (g/mol) das fórmulas:

H2O
Na2HPO4
CaCO3
Li2SO4
KNO3
NaHCO3

CH3CH2OH
CH3CH2NH2
CH3CH3
CH4
CH3OH​

Answer 1

Resposta:Segue as contas abaixo na explicação

Explicação:

H2O--->1.2+16.1--->2+16--->18 g/mol

Na2HPO4--->23.2+1.1+31.1+16.4--->46+1+31+64--->142 g/mol

CaCO3--->40.1+12.1+16.3--->40+12+48--->100 g/mol

Li2SO4--->7.2+32.1+16.4--->14+32+64--->110 g/mol

KNO3--->39.1+14.1+16.3--->39+14+48--->101 g/mol

NaHCO3--->23.1+1.1+12.1+16.3--->23+1+12+48--->84 g/mol

CH3CH2OH--->12.2+1.6+16.1--->24+6+16--->46 g/mol

CH3CH2NH2--->12.2+1.7+14.1--->24+7+14--->44 g/mol

CH3CH3--->12.2+1.6--->24+6--->30 g/mol

CH4--->12.1+1.4--->12+4--->16 g/mol

CH3OH​--->12.1+1.4+16.1--->12+4+16--->32 g/mol