Question

Calculeaza cate grame si cate molecule se gasesc in 2 moli H2O.

Answer 1

Răspuns:

Explicație:

2moli H2O

g, nr. molecule apa

MH2O= 2+16=18--------> 18g/moli

n= m : M

m=n . M

m= 2moli .18 g/moli=36g H2O

1mol H2O----------6,023.10²³molecule H2O

2moli H2O----------------x

x=2 . 6,023.10²³ = 12,046 .10²³molecule H2O