Question

$1.6g$ of an organic compound gave $2.6g$ of magnesium pyrophosphate the percentage of phosphorus in the compound is.

• A. $45.38\%$
• B. $54.38\%$
• C. $37.76\%$
• D. $19.02\%$

Answer 1

Answer: (A)

$45.38\%$

Answer 2

: % of $P = \frac{62}{222} \times \frac{x}{w} \times 100$

$= \frac{62}{222} \times \frac{2.6}{1.6} \times 100 = 45.38\%$