14-5: Molarity
Chapter 14
	Dr. Robert Belford & Rebekah Reinhart

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Question 1 An organic solution is 72% water. If the density of the organic material is 1.3 g/mL and the molecular weight is 64 g/mol, calculate the molarity of the solution. (A)  2.8 (B)  4.4 (C)  5.7 (D)  None of the above   Hint Your response Not answered yet

Question 2 Commercial vinegar has been analytically determined to be 10.2% acetic acid (CH3COOH) by mass. The molecular mass of acetic acid is 60 g/mol. The density of vinegar is 1.01g/mL. Calculate the molarity of acetic acid in 50 mL of vinegar. (A)  1.717M (B)  2.815M (C)  0.983M (D)  None of the above   Hint Your response Not answered yet

Question 3 What is the molarity of a solution that is 3.6% my mass NaOH. The molecular mass of NaOH is 40 g/mol, and the density of the solution is 1.0g/mL. (A)  1.8M (B)  0.9M (C)  1.2M (D)  None of the above   Hint Your response Not answered yet

Question 4 A 2.7M solution is found to be composed of 8.3% by mass of an unknown organic compound. The density of the solution was experimentally determined to be 1.5g/mL. In order for a scientist to identify the compound, he must know the molecular mass. Calculate the molecular mass of the unknown compound. (A)  58 g/mol (B)  67 g/mol (C)  46 g/mol (D)  None of the above   Hint Your response Not answered yet

Question 5 Calculate the molar concentration of a solution containing 11.8g MgBr2 dissolved in 100mL of water. The density of the solution is 1.2g/mL, and the molecular mass of MgBr2 is 184g/mol (A)  0.82M (B)  0.69M (C)  0.51M (D)  None of the above   Hint Your response Not answered yet