Question

4 moles of So2, are oxidized to SO3, how many
moles of oxygen required?
a. 2
b. 3
c. 4
d. 1
Solution with explaination​

Answer 1

Answer:

A) 2

Explanation:

every mole of SO2 requires 1 extra mole of O (or half a mole of O2) to produce SO3 and and since there are 4 moles of SO2 then you'll need 4 moles of O (2 moles of O2) thus the answer should be 2 moles of oxygen are required.

Answer 2

Answer:

(a)2 moles

Explanation:

Look at the equation for the reaction.

2SO2 +O2 = 2SO3

These tell you the relative number of molecules involved. 2 sulphur dioxide; 1 oxygen; 2 sulphur trioxide.

A mole is simply a huge number just as ‘a dozen’ is a relatively small number.

2 dozen SO2 + 1 dozen O2 = 2 dozen SO3

2 dozen SO2 + 1 dozen O2 = 2 dozen SO32 moles SO2 + 1 mole O2 = 2 moles SO3

So if you start with 4 moles of SO2 you’ll need half a much moles of O2

Answer 2 moles of O2 will be needed.

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