# How many molecules are there in 2.3 grams of #NH_4SO_2#?

##### 1 Answer

Mar 16, 2016

First calculate the molar mass of NH4SO2. The molar mass can determine the number of moles. Then use Avogodro's number to calculate the number of molecules.

#### Explanation:

Please see this video. It walks you through step by step how to do a similar problem.

Key Steps:

Step 1. Calculate molar mass of your compound

Step 2. Divide 2.3 grams by the molar mass of NH4SO2, this gives us moles

Step 3. Multiply by Avogodro's number (6.02x10^23) this gives you molecules.