Question

A sample of 67 G of kno2 is dissolved to make 1 L of solution what is the molarity of the solution?

1.3 m.
0.6 m.
6,773.8m.
329.4m.​

Answer 1

Molarity = 0.79 M

Step-by-step explanation:

Given data:

Mass of KNO₂ = 67 g

Volume of solution = 1 L

Molarity of solution = ?

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/ molar mass

Number of moles = 67 g / 85.10379 g/mol

Number of moles = 0.79 mol

Molarity:

Molarity = number of moles / volume in L

Molarity = 0.79 mol/1 L

Molarity = 0.79 M