Chemistry Examples

$H_{2} O_{2}$

Step 1

To find the mass of $1$ mole of $H_{2} O_{2}$ 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 $H_{2} O_{2}$ $=$ $2 (mass of H)$ + $2 (mass of O)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $H_{2} O_{2}$ $=$ $2 (1.00999999)$ + $2 (16)$

Step 3

Simplify the result.

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Step 3.1

Simplify each term.

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Step 3.1.1

Multiply $2$ by $1.00999999$ .

mass of $1$ mole of $H_{2} O_{2} = 2.01999998 + 2 (16) g$

Step 3.1.2

Multiply $2$ by $16$ .

mass of $1$ mole of $H_{2} O_{2} = 2.01999998 + 32 g$

Step 3.2

Add $2.01999998$ and $32$ .

mass of $1$ mole of $H_{2} O_{2} = 34.01999998 g$