Question

Qual a massa de 2.10^23 moléculas KMnO4?

Answer 1

Resposta:

435,55g

Explicação:

1 mol --- 6,02 . 10^23

x mol --- 2,10 . 10^26

x = 2,87 mols

MM do KMnO4 = 158,03 g

1 mol de KMnO4 --- 158,03g

2,87 mols de KMnO4 --- x g

x = 453,55 g