Find the molarity of a 450 mL solution containing 13.7 g of ZnSO4.

The molarity is 0.189

Explanation:

Molarity is a measure of concentration of a solution that indicates the number of moles of solute that are dissolved in a given volume. In other words, the molarity indicates the amount of moles of solute that appear dissolved in each liter of the mixture.

Molarity is determined by the expression:

Molarity is expressed in units ().

So, you need to know the amount of moles of ZnSO₄. Then you must know the molar mass. If:

the molar mass of ZnSO₄ is:

ZnSO₄= 65 g/mol + 32 g/mol + 4* 16 g/mol= 161 g/mol

Then you can apply a rule of three as follows: if 161 g of ZnSO₄ is contained in 1 mole, 13.7 g in how many moles are they?

moles=0.085

Then you know:

Replacing in the definition of molarity:

Molarity=0.189

The molarity is 0.189

the answer is option a.