Question

Find the moles of 23 mL of 2.8 M solution

Answer 1

The molarity is defined as:

`Molarity=(MolesSolute)/(LitersSolution)`

We have the molarity (2.8M) and the volume (23mL). We have to take into account that volume must be expressed in liters, so the volume that we will use will be:

`V=23mL*(1L)/(1000mL)=0.023L`

So, the moles of solute will be:

`MolesSolute=Molarity* Volume`
`MolesSolute=2.8M*0.023L=0.0644moles`

Answer: There are 0.0644moles