Question

What is the molarity of 40g of urea in 500 cm3 of solutuion

Answer 1

Answer:

Explanation:Mass of urea(W)=200mg= 2*10^(-1)g

Molar mass of urea(M) =60g

Volume of water( V) =40*10^(-3)

Molarity =no.of molesof solute /volume of solutions  

Molarity =W = 0.0825

911 views · View 4 Upvoters

Answer 2

Answer:

1 Litre = 1000cm³

=> 1 cm³ = 0.001 L

=> 500cm³ = 500(0.001)L = 0.5 L

Molarity = Mass/Volume

=> Molarity of Urea = 40g/0.5L

=> Molarity = 40(2)M = 80M

Therefore molarity is 80 Molar.