Asolution is made by dissolving 14.0 g of potassium chloride to a final volume of 78.9 ml solution. what is the weight/weight % or the percent by mass of the solute? (use 1.00 g/ml for the density of water)

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.