Question

If the concentration of a sample was found to be 0.010 mol dm-3 how many moles are there in 150 ml? 1. 1.5 mol 2. 0.15 mol 3. 15 mol 4. 0.0015 mol 5. 0.015 mol

Answer 1

0.0015 " mol"

Explanation:

Establish that
`1 dm^3= 1 L`

Therefore:
`150 cancel(ml) xx(1cancel(L))/(1000cancel(ml))xx(1cancel(dm^3))/ (1 cancel(L))xx(0.010 mol)/ (cancel(dm^3))= 0.0015 " mol"`