Question

pls dau 20 pct pls pls pls

Answer 1

nO2=m/M=32 g/32 g/mol=1mol

1mol=6,023*10 ²³atomi

1.1 mol de atomi de H

2. 1mol H2=2 g

3 1mol Ca=40 g

4 .1mol

5 1mol

6.31 g P