43) which the following reactions does not proceed significantly to the right in aqueous solutions?
a) Hsub3O^+ + OH^- --> 2Hsub2O
b) HCN + OH^- ---> Hsub2O + CN^-
c) Cu(Hsub2O)sub 4^2+ + 4 NHsub3 ---> Cu(NHsub3)sub4^2+ + 4Hsub2O
d) Hsub2SOsub4 + Hsub2O ---> Hsub3O^+ + HSOsub4^-
e) Hsub2O + HSOsub4^- ---> Hsub2SOsub4 + OH^-
44) A compound is heated to produce gas whose molecular mass is to be determined. The gas is collected by displacing water in a water filled flask inverted in a trough of water. which of the following is necessary to calculate the molecular mass of the gas, but does not need to be measured during the experiment
45) A 27 g sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27 g of water. What is a possible molecular formula of the hydrocarbon.
Three multiple choice problems are reasoned through to find the most likely solution; one of which is a stoichiometry problem.