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The percentage labelling (mixture of H(2...

The percentage labelling (mixture of `H_(2)SO_(4)` and `SO_(3))` refers to the total mass of pure `H_(2)SO_(4)`. The total amount of `H_(2)SO_(4)` found after adding calculated amount of water to `100 g` oleum is the percentage labelling of oleum. Higher the percentage lebeling of oleum higher is the amount of free `SO_(3)` in the oleum sample.
What is the amount of free `SO_(3)` in an oleum sample labelled as '118%'.

A

`40%`

B

`80%`

C

`60%`

D

`9%`

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The correct Answer is:
A
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