Question

What is the molarity of a solution made by adding 1.300 g of NaOH to a 250-mL volumetric flask and diluting to the mark?

Answer 1

To find mol with the 1.3g of NaOH divide it by the weight of NaOH.
And convert 250ml into L.
That is 0.250 ml
molarity is mol/L = 0.13 mol/L