Question

You have 10.0 L of 1.2 M KNO3. What molarity would the KNO3 solution be if you were to take 2.5 L of it and dilute it to 10.0 L?

Answer 1

1.2M x (2.5/10.0) = ?

Or another way.
mols KNO3 in the 2.5L = M x L = 2.5L x 1.2M = ?
?mols/10.0L = ??