# What is the molecular formula of a compound with a mass of 180 grams and an empirical formula of #CH_2O#?

##### 1 Answer

Jan 5, 2016

#### Explanation:

First, calculate the **formula mass** of the empirical formula:

Next we need to find what I personally refer to as the **multiplier**: it is not given an official name, but it is the number that we will *multiply* the **mole ratios** (the subscript numbers) in the empirical formula by to give the **molecular formula**. Observe this simple equation:

Now, put that multiplier into effect: