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23 solutions

Mass Percent Formula

Q. a) You are given a 27% (w/v) solution of psicose. Molar mass: psicose (C6H12O6) = 180.156 g/mol. What volume (in mL) will contain 450 µmoles of psicose?

Solved • Aug 13, 2019

Mass Percent Formula

Q. A solution is prepared by dissolving 98.6 g of NaCl in enough water to form 875 mL of solution. Calculate the mass % of the solution if the density of the solution is 1.06 g/mL. A) 12.7% B) 9.4% C) 11.9% D) 10.6% E) 11.3%

Solved • Jul 15, 2019

Mass Percent Formula

Q. Calculate the molality of a 10.0% (by mass) aqueous solution of hydrochloric acid. A) 3.05 m B) 0.274 m C) 2.74 m D) 4.33 m E) The density of the solution is needed to solve the problem.

Solved • Jul 15, 2019

Mass Percent Formula

Q. What is the weight percent of a caffeine solution made by dissolving 4.35 g of caffeine, C8H10N4O2, in 75 g of benzene, C6H6? A) 0.058% B) 5.8% C) 0.055% D) 5.5%

Solved • Jul 15, 2019

Mass Percent Formula

Q. A solution is prepared by dissolving 171 g of CdCl2 in enough water to make exactly 250.0 mL of solution. If the density of the solution is 1.556 g/mL, what is the weight percent of CdCl2 in the solution? A) 56.0% B) 68.4% C) 44.0% D) 7.17%

Solved • Jul 15, 2019

Mass Percent Formula

Q. A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make exactly 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the weight % H2SO4 in the solution? A) 18.00% B) 16.00% C) 84.00% D) 19.00%

Solved • Jul 15, 2019

Mass Percent Formula

Q. Zeatin, a plant hormone, is known to have 5 nitrogen atoms in every molecule. Nitrogen makes up 33.8% of the mass of the molecule. What is the mass of one molecule?

Solved • Jul 16, 2019