Unit 10: Molarity and Concentration

A 0.674 M cobalt(II) chloride (CoCl2) solution is prepared with a total volume of 0.0750 L. The molecular weight of CoCl2 is 128.9 g/mol. What mass of CoCl2 in grams is needed for this solution

A 0.250 L sample of seawater contains 77.4 g of NaCl, which has a molecular weight of 58.44 g/mol. What is the molar concentration of sodium chloride in the seawater.

A 0.355 L soft drink contains 45.5 grams of sucrose, which has a molecular weight of 324.3 g/mol. What is the molar concentration of sucrose in the soft drink?

An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of glucose is 180.16 g/mol. What mass of glucose is needed for the solution?

A 2.50 L solution contains 5.00 g of NaOH which has a molecular weight of 40.00 g/mol