# How many moles of #Na^+# ions are present in 275.0 mL of 0.35 M #Na_3PO_4# solution?

##### 1 Answer

#### Explanation:

The definition of concentration is

where concentration is is moles per litre (M), n is the number of moles (mol) and V is the volume in litres (L). Make sure to use these units to get the right answer.

I.e.

Now rearrange the concentration formula to solve for the number of moles of

The number of moles is a measure of how many particles there are. The chemical formula shows that for every