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Question: > A compound of magnesium contains \(21.9\%\) magnesium \(27.8\%\) phosphorus and \(50.3\%\) oxygen....

A compound of magnesium contains 21.9%21.9\% magnesium 27.8%27.8\% phosphorus and 50.3%50.3\% oxygen. What will be the simplest formula of the compound?

A

Mg2P2O7Mg_{2}P_{2}O_{7}

B

MgPO3MgPO_{3}

C

Mg2P2O2Mg_{2}P_{2}O_{2}

D

MgP2O4MgP_{2}O_{4}

Explanation

Solution

(1) :

Element

Percentage

Molar

ratio

Relative

Ratio

Simple

whole

number

ratio

Mg

21.9

21.9/24 = 0.91

1

2

P

27.8

27.8/31 = 0.90

1

2

O

50.3

50.3/16 = 3.14

3.48

7

Formula of the compound= Mg2P2O7Mg_{2}P_{2}O_{7}