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Q.

Which compound contains the highest percentage of magnesium by mass?

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a

$M g N H_{4} P O_{4}$

b

$M g (H P O_{4})_{2}$

c

$M g_{3} (P O_{4})_{2}$

d

$M g_{2} P_{4} O_{7}$

answer is D.

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Detailed Solution

$M g_{3} (P O_{4})_{2}$ compound contains the highest percentage of magnesium by mass.

$\frac{24 \times 3}{262} \times 100$

$= 27.48 %$

Hence, option D is correct.

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Which compound contains the highest percentage of magnesium by mass?