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

Question

A compound of magnesium contains 21.9 % magnesium, 27.8 % phosphorus and 50.3 % oxygen. What will be the simplest formula of the compound? (A) Mg2P2O7 (B) MgPO3 (C) Mg2P2O2 (D) MgP2O4

Tardigrade Admin · Accepted Answer

Element Percentage Molar ratio Relative ratio Whole no. ratio Mg 21.9 21.9/24=0.91 1 2 P 27.8 27.8/31=0.90 1 2 O 50.3 27.8/31=0.90 3.48 7 Formula of the compound = Mg2P2O7

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

$M g_{2} P_{2} O_{7}$

$M g P O_{3}$

$M g_{2} P_{2} O_{2}$

$M g P_{2} O_{4}$

Element Percentage Molar ratio Relative ratio Whole no. ratio

Mg 21.9 21.9/24=0.91 1 2

P 27.8 27.8/31=0.90 1 2

O 50.3 27.8/31=0.90 3.48 7

Formula of the compound $= M g_{2} P_{2} O_{7}$

Element	Percentage	Molar ratio	Relative ratio	Whole no. ratio
Mg	21.9	21.9/24=0.91	1	2
P	27.8	27.8/31=0.90	1	2
O	50.3	27.8/31=0.90	3.48	7

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

Mg2​P2​O7​

MgPO3​

Mg2​P2​O2​

MgP2​O4​