What is the difference between a 5.00% (m/m) glucose solution and a 5.00% (m/v) glucose solution?

Calculate the grams of solute needed to prepare the following:450 mL of a 2.0% m/v KOH solution.

What is the mass/volume percent concentration of the following solutions:0.075 mol sucrose (C₁₂H₂₂O₁₁) in 270 mL of solution.

The pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)