Question

What is the mass percent of nitrogen in the dyeing agent, picric acid (C6H3N3O7)? (The molar mass of C = 12.01, H = 1.0079, N = 14.01, and O = 16.00.)

Answer 1

18.34
D for plato users

Answer 2

Answer : The mass of percent of nitrogen in the dyeing agent, picric acid is, 6.11 %

Solution : Given,

Molar mass of nitrogen = 14.01 g/mole

Molar mass of picric acid =  229.11 g/mole

As, we know that in $C_6H_3N_3O_7$, there are 6 carbon atoms, 3 hydrogen atoms, 3 nitrogen atoms and 7 oxygen atoms.

Formula used for the mass percent of nitrogen.

$\text{Mass percent of nitrogen}=\frac{\text{Mass of nitrogen}}{\text{Molar mass of picric acid}}\times 100$

Now put all the given values in this formula, we get the mass of percent of nitrogen.

$\text{Mass percent of nitrogen}=\frac{14.01}{229.11}\times 100=6.11\%$

Therefore, the mass of percent of nitrogen in the dyeing agent, picric acid is, 6.11 %