Chemistry Examples

$S n O$

Step 1

To find the mass of $1$ mole of $S n O$ 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 $S n O$ $=$ $(mass of Sn)$ + $(mass of O)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $S n O$ $=$ $(118.70999908)$ + $(16)$

Step 3

Simplify the result.

Tap for more steps...

Step 3.1

Remove parentheses.

mass of $1$ mole of $S n O = 118.70999908 + 16 g$

Step 3.2

Add $118.70999908$ and $16$ .

mass of $1$ mole of $S n O = 134.70999908 g$

Step 4

Find the mass percentage of $S n$ .

Tap for more steps...

Step 4.1

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

Mass percentage of $S n = \frac{118.71}{134.70999908} \cdot 100$

Step 4.2

Divide $118.71$ by $134.70999908$ .

$0.88122634 \cdot 100$

Step 4.3

Multiply $0.88122634$ by $100$ .

$88.1226344$

Step 4.4

Set the number as a percent.

Mass percentage of $S n = 88.1226344 %$

Step 5

Find the mass percentage of $O$ .

Tap for more steps...

Step 5.1

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

Mass percentage of $O = \frac{16}{134.70999908} \cdot 100$

Step 5.2

Divide $16$ by $134.70999908$ .

$0.11877366 \cdot 100$

Step 5.3

Multiply $0.11877366$ by $100$ .

$11.87736627$

Step 5.4

Set the number as a percent.

Mass percentage of $O = 11.87736627 %$

Step 6

Find the mass percentage of each element in the molecule.

Mass percentage of $S n = 88.1226344 %$

Mass percentage of $O = 11.87736627 %$