Chemistry help please

Question

What volume (in mL) of a 0.2M solution would contain 0.5 mol of HNO3?

answer:2500L

How do you work this out?

Answer 1

The answer is actually 2500mL, I suspect you knew that and it was just a typo on your part.

To get the answer recall that Molarity is moles solute per Liter solution. (M=mol/L)

If you know two qualities (moles, Liters, or Molarity) you can solve for the unknown by using the appropriate relation below:

1. M = moles / L
2. L = moles / M
3. moles = M * L

Since you know M = 0.2 and moles = 0.5 and you want mL simple plug these values into the relation for L and convert:

1. L = moles / M = 0.5 / 0.2 = 2.5L
2. 2.5L = 2500mL

Hope this helped explain how the answer was arrived at.