Question

Ce cantitate de oxigen se gaseste in
36g H2S
2 moli H2SO4
0,15 Kmoli SO2
Dau coroana !!!!!!!!!!!!!!

Answer 1

In 36 g de H₂S nu este oxigen, deci O=0
2 moli H₂SO₄
Mh₂so₄=2+32+16x4=34+64=98, deci un mol de H₂SO₄ are masa de 98g
2 moli H₂SO₄=98x2=196g
98g H₂SO₄................64g O
196g H₂SO₄..................xg O

$\frac{98}{196} = \frac{64}{x}$
$x= \frac{196x64}{98}$
$x= \frac{12544}{98}$
$x=128 g$ O 

0,15 Kilomoli SO₂= 150 moli SO₂

Mso₂= 32+16x2=32+32=64g, deci un mol de SO₂ este egal cu 64 g
150 moli SO₂= 64x150=9600 g
64g SO₂...........32g O
9600g SO₂.................xg O

$\frac{64}{9600} = \frac{32}{x}$
x= $\frac{9600x32}{64}$
$x= \frac{307200}{64}$ 
$x= 4800 g$ O