Calculate the mass of glucose needed to prepare 250g of 5% solution of glucose. answer with steps.

Question

its from chemistry and I think it is molecular mass not sure about this please give me the answer.it is a question of 9th standard.

Answer 1

Molar mass of glucose = 180.156 g/mol

Assuming this is 5% by mass (m/m) since it wants 250 g of solution, then...

5% of 250 grams = 0.05 x 250 g = 12.5 g of glucose

250 g - 12.5 g = 237.5 g of solvent 

Assuming the solvent is water:  12.5 grams of glucose + 237.5 grams of water = 250 g of solution that is 5% by mass glucose.