Answer:
The molarity of this solution is 6.8 * 10^-2 M
Explanation:
<u>Step 1:</u> Data given
Mass of CoBr*6H2O = 10.0 grams
Molar mass of cobalt(Ⅱ) bromide hexahydrate =
Volume of the solution = 450 mL = 0.450 L
<u>Step 2:</u> Calculate moles of cobalt(Ⅱ) bromide hexahydrate
Number of moles = Mass / molar mass
Number of moles = 10.0 grams / 326.85 g/mol
Number of moles = 0.0306 moles
<u>Step 3:</u> Calculate molarity of the solution
Molarity = number of moles / volume
Molarity = 0.0306 moles / 0.450L
Molarity = 0.068 M = 6.8 * 10^-2 M
The molarity of this solution is 6.8 * 10^-2 M