# Definition:Gram-Equivalent

## Definition

The gram-equivalent of a chemical element $E$ in a particular compound is the ratio of the mass of $E$ to another, with the mass of hydrogen taken as $1$.

## Examples

### Oxygen in Water

$1$ gram of hydrogen combines with $8$ grams of oxygen to make $9$ grams of water.

Thus the gram-equivalent of oxygen in water is $8$ grams