Question

Answer 1

bài 7

2Mg+O2-to>2MgO

0,15--0,075---0,15

2KClO3-to>2KCl+3o2

0,05------------------0,075

n Mg=\(\dfrac{3,6}{24}\)=0,15 mol

=>VO2=0,075.22,4=1,68l

=>m MgO=0,15.40=6g

=>m KClO3=0,05.122,5=61,25g

Answer 2

bài 6

Fe2O3+3H2-to>2Fe+3H2O 

0,2--------0,6--------0,4

Zn+H2SO4->ZnSO4+H2

0,6-------------------------0,6

nFe=\(\dfrac{22.,4}{56}\)=0,4 mol

=>m Fe2O3=0,2.160=32g

=>VH2=0,6.22,4=13,44l

=>m Zn=0,6.65=39g

 

Answer 3

bài 5

Zn+2HCl->ZnCl2+H2

0,1----0,2----0,1--------0,1

H2+CuO-to>Cu+H2O

0,1---------------0,1

n Zn=\(\dfrac{6,5}{65}\)=0,1 mol

=>VH2=0,1.22,4=2,24l

=>m ZnCl2=0,1.136=13,6g

=>m Cu=0,1.64=6,4g