Question

3- Calcule a massa molecular para:
Dadas as MA: H=1u, O=16u, S=32u, C=12u, Ca=40u.
a) H 2 SO 4
b) CaCO 3

Answer 1

Tranquila.

A) H2SO4 = 97

H2 = 2x1 = 1

S = 32x1 = 32

O4 = 16x4 = 64

64+32+1 = 97

B) CaCo3 = 100

Ca = 40x1 = 40

C = 12x1 = 12

O3 = 16x3 = 48

48+40+12 = 100