Calculate the molality of a 35.9% (by mass) aqueous solution of phosphoric acid (H3PO4). Calculate the molality of a 35.9% (by mass) aqueous solution of phosphoric acid (H3PO4). 11.4 m 2.86 m 560 m 5.71 m The density of the solution is needed to solve the problem.

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

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5