Question

hoe many liters of 5%(w/m) glucose solution would you take to obtain 75g glucose

Answer 1

5% (w/m) means 5g of glucose solute is present in 100 g (or ml) of solution.

(Apply Unitary Method)
so, for 5 g of solute = 100g of solution
for 75g of solute = (100/5)* 75
= 20*75
= 1500
So, 1500 ml (or 1.5 litres) of 5% Glucose Solution is required to obtain 75g Glucose.