Question

Qual a massa de 3 mols de h20

Answer 1

1 mol de H2O :  

1.2 + 16.1 = 2 + 16 = 18 g

regra de três simples :

1 mol -------------------- 18g  

3 mol --------------------- x  

x = 3 . 18

x = 54 g

Answer 2

1 mol _____________ 18g

3 mol _____________ x

x = 54 gramas.