Question

1) Dê as massas moleculares:
a) H20
b) NH3
c) HESO4
d) H2
e) O2

Answer 1

a) H₂O = (2 . 1u) + (1 . 16u) = 2u + 16u = 18u;

b) NH₃ = (1 . 14u) + (3 . 1u) = 14u + 13u = 17u;

c) H₂SO₄ = (2 . 1u) + (1 . 32u) + (4 . 16u) = 2u + 32u + 64u = 98u;

d) H₂ = 2 . 1u = 2u;

e) O₂ = 2 . 16u = 32u