Răspuns:
1. 1 mol MgsO4........... 32g S
3 moli........................ X
X=3x32=96
2.18g h2o................. 2g h
36g....................... Y
Y=36x2/18=4
3. 16 g Ch4....................... 4g h
A.................................... 16 g H
A=16x16/4=64
4. 1 mol co2............... 32g o2
B moli...................... 64 g O2
B=64/32=2 moli
