In each case tell which SN2 reaction will proceed faster. 1. The displacement by CH3CO2- on 1-bromopropane in (a) dimethylformamide or (b) water. 2. The displacement by OH- on CH3CH2I in (a) ethanol or (b) dimethyl sulfoxide.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.