how many grams of powdered milk did you use to prepare 100 ml of 5% powdered milk to mix solution?

ans:
1.molarity=mol/volume in L

2. %(m/v)=g of solute/mL of solutions × 100%

C1=5g/100mL(100%)=5%
C2=0.25g/1000mL(100%)=0.025%

V2 is 1L=1000mL


C1V1=C2V2

5%×V1=0.025%×1000mL

V1=0.025×1000mL/5

ans: V1= 5mL​