Question

pls ans above question​

Answer 1

Answer:

The formula used to calculate the molarity of a solution is:

$\boxed{ \textbf{Molarity} = \dfrac{ \textbf{No of moles of solute}}{\textbf{Volume of solution (in L)}}}$

Molar mass of Urea = 60 g

Given Mass of Urea = 40 g

Number of moles of Urea = 40g / 60g = 0.67 moles

Volume of solution = 500 cm³ = 500 mL = 0.5 L

Substituting the given information in the formula we get:

⇒ Molarity (M) = 0.67/0.5

⇒ Molarity (M) = 1.34 M

Hence the molarity of the solution is 1.34 M.

Answer 2

QUESTION:-

Urea is a white solid used in fertilizers,A solution contain 40 g urea dissolved in 500 cm³ of solution.Calculate molarity of the solution

EXPLA NATION:-

We know that:-

$\boxed{\sf\;Molarity=\frac{Number\;of\;moles\;of\;solute}{Volume\;of\;solution(L)}}$

In this question:-

Mass of urea=40 g

Volume of solution=500 cm³=500 mL=500/1000=0.5 L

And we know that:-

Molar mass of urea=40 g

So,Number of moles of Urea = 40g / 60g = 0.67 moles

Now let's put the data in the formula :

=>Molarity=0.67/0.5

=>Molarity=1.34

Thus,Molarity of the solutionis 1.34 M