Question

4 moles of SO2, are oxidized to SO3, how many moles of oxygen required
A 2
B. 3
C.4
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Answer 1

Answer:

5.

Explanation:

4 mole=1*32+2*16=32+32=64

1mole=64/4=16. eq 1

Now,

SO3=1*32+3*16=32+48=80 eq 2

Then,

divide eq 1 by eq 2

80/16=5

Therefore, 5moles r in SO3

Answer 2

C. 3

4moles of SO2 contains 8 moles of oxygen. To oxidize SO3, We need another 4 moles of oxygen.

4(SO2)+4O2 = 4(SO3)

here, no.of O's in reactants are equal to no.of O's in products.

4.2 + 2.2 =3.2

8 +4 =12