1mol O2---------32g
xmoli -------------64g
x=64:32=2moli
1mol O2---------22,4 litri
2moli---------------y litri
y=2moli .22,4litri: 1mol=44,8 litri
1mol O2 -----------6,023.10²³molecule
2moli O2-------------z
z=2 .6,023 .10²³=12,046 .10²³molecule
