Respostas

2013-11-15T17:51:52-02:00
M = mols.

1m Caco3 ~~~~~~~~ 3m O
4,25m Caco3 ~~~~~  xm  O

x = 3 * 4,25
x = 12,75

Átomos:

 1 -------6,02.10^23
 12,75 ------X

 x = 6,02.10^23 * 12,75
 x = 76,755.10^23
 x = 7,6755.10^24

Átomos "O": 7,6755.10^24.
1 4 1