Question

salutare am nevoie de ajutor la urmatoarele 2 probleme dau coroana Urgent

Answer 1

a) 2 H2O2---->2 H2O +O2

1molO2-------2moli H2O2

10moli-------- 20 moli

n=m/M =>m= n*M=20*34=680g H2O2

c=md *100/ms =>ms=680*100/30=2266.66g sol=2.267kg

b) S + O2 =SO2

1mol O2----------1mol S

10moli S----------10 moli S

m=n*M= 10*32=320g sulf

c)100 g sulf impur----------80 g sulf pur

   340g------------------------272g sulf pur

calculam nr moli: n=m/M=272/32=8,5moli S

Conform reactiei:

1molS------------1mol SO2

8.5 moli-------8.5 moli SO2

m=n*m=8,5*64= 544g SO2

d)a=H2O; b=O2; d= H2; f=HCl; e=Al2O3

H2O2=>H20 +1/2O2

2 H2O=>2H2 +O2

H2 + Cl2=> 2 HCl

3O2 + 4Al => Al2Cl3

H2 + S=> H2S