6
QuizMultiple Choice

Measures of Concentration: Molarity — Quiz

Question 6 • Chemistry

In a group assignment, students are required to fill 10 beakers with 0 point 7 2 0 cap m CaCl sub 2 If the molar mass of CaCl sub 2 is 110 point 9 8 g/mol and each beaker must have 250 point milliliters of solution, what mass of CaCl sub 2 would be used? Use molarity is equal to moles of solute over liters of solution

Answer
A
200 g
B
3 point 1 3 g
C
617 g
D
38 point 5 g

Explanation

There are 10 beakers, each holding 250 mL, so the total solution volume is 2.50 L. At 0.720 mol/L, that requires 0.720 × 2.50 = 1.80 mol of CaCl₂. Multiplying by its molar mass gives 1.80 mol × 110.98 g/mol = 199.8 g, which rounds to 200 g.

AI-written and checked against the verified answer.

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