Chemistry Homework Help

Browse Homework Solutions

86 solutions

Mass Percent

Q. An aqueous solution of magnesium sulfate, MgSO4, contains 2.15 grams of magnesium sulfate and 17.7 grams of water. The percentage by mass of magnesium sulfate in the solution is ___%

Solved • Aug 30, 2019

Mass Percent

Q. A solution is prepared by dissolving 49.3 g of KBr in enough water to form 473 mL of solution. Calculate the mass % of KBr in the solution if the density is 1.12 g/mL. A) 9.31% B) 10.4% C) 11.7% D) 10.1% E) 8.57%

Solved • Jul 15, 2019

Mass Percent

Q. What mass of CuCl2 is contained in 75.85 g of a 22.4% by mass solution of CuCl2 in water. A) 11.2 g B) 33.9 g C) 5.89 g D) 29.5 g E) 16.9 g

Solved • Jul 15, 2019

Mass Percent

Q. What mass of ethane (CH3CH3) is contained in 50.0 mL of a 13.9% by mass solution of ethane in hexane? The density of the solution is 0.611 g/mL. A) 11.8 g B) 2.35 g C) 6.95 g D) 4.25 g E) 8.49 g

Solved • Jul 15, 2019

Mass Percent

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) 11.9% B) 12.7% C) 9.4% D) 10.6% E) 11.3%

Solved • Jul 15, 2019

Mass Percent

Q. Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molarity of the HCl, if the solution has a density of 1.20 g/mL. A) 12.8 M B) 9.35 M C) 13.9 M D) 7.79 M E) 10.7 M

Solved • Jul 15, 2019

Mass Percent

Q. Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molality of the HCl, if the solution has a density of 1.20 g/mL. A) 39.0m B) 10.7m C) 17.5m D) 9.44m E) 6.39m

Solved • Jul 15, 2019