Answer :

Answer: 0.48M

Explanation:

Calculating Molarity:

Molarity = moles/volume (in litres)

now calculating moles of NaNO3

moles= mass/molar mass

14.2g/ 85g/mol = 0.167 moles

converting volume of solution into litres  350ml = 0.350 L

now molarity

moles/volume

0.167/0.350= 0.48M