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68 solutions

Mass Percent

Q. If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 185-pound man? a) 5.7kg Ca b) 1.2*10^2kg Ca c) 1.2kg Ca d) 5.7*10^2kg

Solved • Oct 5, 2019

Mass Percent

Q. A solution of ethanol, CH3CH2OH, in water has a concentration of 1.10 m. Calculate the mass percent of ethanol.

Solved • Sep 26, 2019

Mass Percent

Q. Hydrofluoric acid dissolves glass and must be stored in plastic containers. What mass of a 16 %(w/w) solution of HF(aq) contains 7.8 g of HF?

Solved • Sep 26, 2019

Mass Percent

Q. You want to make 100 ml of a 0.0095% bleach disinfectant solution. You have a full bottle of 100% bleach. You have access to sterile water and pipettes. You have two 100 ml bottles and two graduated cylinders (one holds 25 ml, the other 200 ml). How will you make your solution? Show your math. (3 pts)

Solved • Sep 23, 2019

Mass Percent

Q. 1. The maximum value for mole percent is _________. 2. The maximum value for percent by mass is ___________.

Solved • Sep 23, 2019

Mass Percent

Q. what is the mass % concentration of a 0.50 mol/L NaOH solution if the density of the solution is 1.0 g/ml?

Solved • Sep 21, 2019

Mass Percent

Q. 14. A 2.50 kg aqueous solution is prepared by dissolving fructose (C6H12O6) in water. The percent by mass of the solution is found to be 14.3%. How much fructose (in g to one decimal place) was dissolved in the solution? What is the concentration (in M to two decimal places) of the solution? (dwater = 1.0 g cm^-3 and dfructose = 1.69 g cm^-3)

Solved • Sep 20, 2019