Question

Cati atomi si cati moli se găsesc in 20g Ca​

Answer 1

Răspuns:

1 mol Ca....40g

x moli Ca....20 g

x= 20/40 =0,5

1 mol Ca....6,022×10²³ atomi

0,5 moli Ca... x

x= 0,5× 6,022×10²³=3,011×10²³ atomi