Calculate the molarity of a solution that contains 20.275g calcium bromide dissolved in 575 mL of solution

1 - We have to get the molar mass of calcium bromide, by getting the chemical formula (CaBr2).

From the chemical formula, we have to get the molecular weight for each of Ca&Br on the periodic table:

Ca = 40.078 & Br = 79.904

* from the chemical formula (CaBr2) so, the molecular weight of calcium bromide is:

40.078 + 2x (79.904) = 199.89

2 - number of moles = weight / molecular weight

=20.275 / 199.89 = 0.1014 moles

3 - where the volume of solution by littre = 575 mL / 1000 = 0.575 L

So,

4-Molarity = moles of solute / L of solution

= 0.1014 / 0.575 = 0.1763 mol/L