Question

calculate the molarity of 2.5 molal urea if it's density is 1.20 gm/ml​

Answer 1

2.0 m

1.2 m

1.0 m

0.6 m

Answer :

Solution :

2 M solution has 2 moles of solute dissolved in one litre (1000 mL) of the solution

Mass of the solution =V×d=1000mL×1.2g mL−1=1200g

Mass of solvent =(1200−200)g=1000g=1kg

Molality of solution (m) =No. of moles of soluteMass of solvent in Kg

2 mol1 kg=2mol Kg−1=2m.

Answer 2

Answer:

your answer

hope it is work