Question

Calculate the molarity of the following solutions:

.45 mol of urea in 2.5x10^2 mL of solution

2.95 mol of methonal in 5.00 L of solution

1.56 mol of NH4C2H3O2 in 1L of solution

Answer 1

1)

volume , V = 250 mL

= 0.25 L

we have below equation to be used:

Molarity,

M = number of mol / volume in L

= 0.45/0.25

= 1.80 M

Answer: 1.80 M

2)

volume , V = 5.00 L

we have below equation to be used:

Molarity,

M = number of mol / volume in L

= 2.95/5

= 0.59 M

Answer: 0.590 M

3)

volume , V = 1 L

we have below equation to be used:

Molarity,

M = number of mol / volume in L

= 1.56/1

= 1.56 M

Answer: 1.56 M