Question

Calcule as massas molares das substancias
HCI
K2O
NA2CO3
H3PO4

Answer 1

a) HCl = 1 + 35,5 = 36,5 g/mol

b) K2O = 39 x 2 + 16 = 92 g/mol

c) Na2CO3 = 23 x 2 + 12 + 16 x 3 = 106 g/mol

d) H3PO4 = 1 x 3 + 31 + 16 x 4 =  98 g/mol

espero ter ajudado!.