Question

Answer 1

4

4P+5O2-to>2P2O5

0,2---0,25 -----0,1 mol

n P=0,2 mol

=>m P2O5=0,1.142=14,2g

=>Vkk=0,25.4.22,4=28l

 

Answer 2

Bài 5

3Fe+2O2-to>Fe3O4

0,3----0,2-----0,1 mol

n Fe3O4=0,1 mol

=>m Fe=0,3.56=16,8g

=>VO2=0,2.22,4=4,48l

2KMnO4-to>K2MnO4+MnO2+O2

0,4-----------------------------------0,2

=>m KMnO4=0,4.158=63,2g