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A compound contains 3.2% of oxygen. The ...

A compound contains `3.2%` of oxygen. The minimum mol. Wt. of the compound is

A

(a)`300`

B

(b)`440`

C

(c )`350`

D

(d)`500`

Text Solution

Verified by Experts

The correct Answer is:
D
The compound must contain at least one oxygen atom So, a minimum of 1 g atom of oxygen will be present in
1 g molecule, i.e., 1 mole of the compound.
If M is the mol. Wt. of the compound then since 16 is the atomic mass of oxygen so minimum of `16 g` of oxygen will be present in `M g` of the compound
Thus, `%` of oxygen `=16/Mxx100`
or `3.2=(16xx100)/M`
or `M=500`
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