Find the Mass Percentages NH_3

$N H_{3}$

Step 1

To find the mass of $1$ mole of $N H_{3}$ look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.

mass of $1$ mole of $N H_{3}$ $=$ $(mass of N)$ + $3 (mass of H)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $N H_{3}$ $=$ $(14.01000022)$ + $3 (1.00999999)$

Step 3

Simplify the result.

Multiply $3$ by $1.00999999$ .

mass of $1$ mole of $N H_{3} = 14.01000022 + 3.02999997 g$

Add $14.01000022$ and $3.02999997$ .

mass of $1$ mole of $N H_{3} = 17.0400002 g$

Step 4

Find the mass percentage of $N$ .

The mass composition percentage is the mass of $N$ divided by the mass of the entire molecule converted to a percentage.

Mass percentage of $N = \frac{14.01}{17.0400002} \cdot 100$

Divide $14.01$ by $17.0400002$ .

$0.82218308 \cdot 100$

Multiply $0.82218308$ by $100$ .

$82.21830889$

Set the number as a percent.

Mass percentage of $N = 82.21830889 %$

Step 5

Find the mass percentage of $H$ .

The mass composition percentage is the mass of $H$ divided by the mass of the entire molecule converted to a percentage.

Mass percentage of $H = \frac{3.03}{17.0400002} \cdot 100$

Divide $3.03$ by $17.0400002$ .

$0.17781689 \cdot 100$

Multiply $0.17781689$ by $100$ .

$17.78168993$

Set the number as a percent.

Mass percentage of $H = 17.78168993 %$

Step 6

Find the mass percentage of each element in the molecule.

Mass percentage of $N = 82.21830889 %$

Mass percentage of $H = 17.78168993 %$

Find the Mass Percentages NH_3

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