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9 solutions

Calculate Molarity

Q. You have a 0.75mg/mL solution of bovine serum albumin (BSA). You add 1mL of the 0.5 mg/mL BSA solution into a standard cuvette (1cm path length), set your spectrophotometer to 280nm and read the absorbance of this BSA solution. What is the absorbance to three decimal places?

Solved • Aug 13, 2019

Calculate Molarity

Q. A student dissolves 3.3 g of biphenyl (C12H10) in 425. mL of a solvent with a density of 0.90 g/mL. The student notices that the volume of the solvent does not change when the biphenyl dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits.

Solved • Jul 21, 2019

Calculate Molarity

Q. A 3.17m solution of CaCl2 in water has a density of 1.24 g/mL. What is the molarity? A) 2.91 M CaCl2 B) 3.50 M CaCl2 C) 2.56 M CaCl2 D) 3.93 M CaCl2

Solved • Jul 15, 2019

Calculate Molarity

Q. At 25.0°C, a solution has a concentration of 3.179 M and a density of 1.260 g/mL. The density of the solution at 50.0°C is 1.249 g/mL. What is the molarity of the solution at 50.0°C? A) 3.179 M B) 3.151 M C) 3.230 M D) 2.545 M

Solved • Jul 15, 2019

Calculate Molarity

Q. Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution. The density of the solution is 1.53 g/mL. Calculate the molarity of this sodium hydroxide solution. A) 0.450 M B) 25.0 M C) 19.1 M D) 125. M

Solved • Jul 15, 2019

Calculate Molarity

Q. A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the molarity? A) 0.1775 M H2SO4 B) 0.1810 M H2SO4 C) 1.940 M H2SO4 D) 1.810 M H2SO4

Solved • Jul 15, 2019

Calculate Molarity

Q. If the density of a 14.47 m (molal) solution of ethanol C2H5OH in water is 0.935 g/mL what is the molarity of ethanol in this solution?

Solved • Jun 25, 2019