# What are the best strategies for identifying where to begin unit conversions?

##### 1 Answer

Dec 4, 2014

To begin unit conversions you want to write down all the **given information** you have in the problem including what the question is asking for.

Example: How many moles of sodium are there in a **0.59 gram sample** of sodium metal.

- Given info: 0.59 grams Na

moles Na=?

In this simple example we see that the question is asking for the moles of sodium, so when we know that when we convert we should be left with**moles as our only unit**. - Now that you know what units you need to end up with, we need to find something that relates our given units (
**grams**) to our desired unit (**moles**.)

A simple connection for grams**molar mass** !

1 mol Na=23 grams Na

**Now** , Set up your problem:

0.59 grams Na

Since we cancelled our units properlly (