Respostas

2013-12-17T20:21:04-02:00
Na= 23g
N= 14g
O3= 16x3

MM=  23+ 14 + 48
MM= 85g
2 3 2
2013-12-17T20:21:20-02:00
Massas:
Na-23
N-14
O-16

NaNO3- 23+14+16x3= 85 g
1 3 1