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Question: > Two elements ‘P’ and ‘Q’ combine to form a compound. Atomic mass of ‘P’ is 12 and ‘Q’ is 16. Perce...

Two elements ‘P’ and ‘Q’ combine to form a compound. Atomic mass of ‘P’ is 12 and ‘Q’ is 16. Percentage of ‘P’ in the compound is 27.327.3 what will be the empirical formula of the compound?

A

P2Q2P_{2}Q_{2}

B

PQ

C

P2QP_{2}Q

D

PQ2PQ_{2}

Answer

PQ2PQ_{2}

Explanation

Solution

(4) :

Element

%

No. of

moles

Mole

Ratio

Whole

No.

ratio

P

27.3

27.3/12 = 2.27

1

1

Q

72.7

72.7/16 = 4.54

2

2

Empirical formula = PQ2PQ_{2}