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Two elements P (atomic weight = 75) and ...

Two elements P (atomic weight = 75) and Q (atomic weight = 16) combine to give a compound having 75.8% of P. The formula of the compound is

A

`P_3 Q_2`

B

`P_3 Q`

C

`PQ_3`

D

`P_2 Q_3`

Text Solution

Verified by Experts

The correct Answer is:
D
100 g of compound contains
Molar ratio of P` =(75.8 )/(75 ) ~~1 ,` moles of `Q = ( 24.2 ) /(16) ~~ 1.5`
Molar ratio of P and Q=1 : 1.5 i.e 2 :3
` therefore ` the formula of the compound is ` P_2 Q_3`
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