Find the Mass Percentages HNO_3

$H N O_{3}$

Step 1

To find the mass of $1$ mole of $H N O_{3}$ 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 $H N O_{3}$ $=$ $(mass of H)$ + $(mass of N)$ + $3 (mass of O)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $H N O_{3}$ $=$ $(1.00999999)$ + $(14.01000022)$ + $3 (16)$

Step 3

Simplify the result.

Remove parentheses.

mass of $1$ mole of $H N O_{3} = 1.00999999 + 14.01000022 + 3 (16) g$

Multiply $3$ by $16$ .

mass of $1$ mole of $H N O_{3} = 1.00999999 + 14.01000022 + 48 g$

Add $1.00999999$ and $14.01000022$ .

mass of $1$ mole of $H N O_{3} = 15.02000021 + 48 g$

Add $15.02000021$ and $48$ .

mass of $1$ mole of $H N O_{3} = 63.02000021 g$

Step 4

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 $H = \frac{1.01}{63.02000021} \cdot 100$

Divide $1.01$ by $63.02000021$ .

$0.01602665 \cdot 100$

Multiply $0.01602665$ by $100$ .

$1.60266581$

Set the number as a percent.

Mass percentage of $H = 1.60266581 %$

Step 5

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 $N = \frac{14.01}{63.02000021} \cdot 100$

Divide $14.01$ by $63.02000021$ .

$0.22231037 \cdot 100$

Multiply $0.22231037$ by $100$ .

$22.23103768$

Set the number as a percent.

Mass percentage of $N = 22.23103768 %$

Step 6

Find the mass percentage of $O$ .

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

Mass percentage of $O = \frac{48}{63.02000021} \cdot 100$

Divide $48$ by $63.02000021$ .

$0.76166296 \cdot 100$

Multiply $0.76166296$ by $100$ .

$76.16629614$

Set the number as a percent.

Mass percentage of $O = 76.16629614 %$

Step 7

Find the mass percentage of each element in the molecule.

Mass percentage of $H = 1.60266581 %$

Mass percentage of $N = 22.23103768 %$

Mass percentage of $O = 76.16629614 %$

Find the Mass Percentages HNO_3

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