Trimethylphosphine, p(ch3)3, can act as a ligand by donating the lone pair of electrons on the phosphorus atom. if trimethylphosphine is added to a solution of nickel(ii) chloride in acetone, a blue compound that has a molecular mass of approximately 270 g and contains 21.5% ni, 26.0% cl, and 52.5% p(ch3)3 can be isolated. this blue compound does not have any isomeric forms. what are the geometry and molecular formula of the blue compound?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

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.

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? (2 points) decreasing temperature decreasing pressure decreasing surface area decreasing solute concentration