# How do you calculate the percentage composition of Oxygen in #N_2O_5#?

##### 1 Answer

Mar 1, 2016

#### Explanation:

You first need refrence a periodic table to find the weight of

Multiply each element based on how many of each element are in the compound. for

add the two weights together to get the total weight of

Divide each elements weight by the total weight of the compound and multiply by 100 and you will have the percentage composition