In the Wittig reaction, an triphenylphosphorus ylide adds to a or to yield a(n) . Aldehyde, ketone, alkene Aldehyde, ketone, alkane Alkene, alkyne, ketone Carboxylic acid, aldehyde, alcohol

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold

Solid tin exists in two forms: white and gray. for the transformation sn(s, white) → sn(s, gray) the enthalpy change is -2.1 kj/mol and the entropy change is -7.4 j/(mol*k). a. calculate the gibbs free energy change for the conversion of 1.00 mol white tin to gray tin at -30℃. b. will white tin convert spontaneously to gray tin at -30℃? c. at what temperature are white and gray tin thermodynamically equivalent at a pressure of 1 atm?

All of the following describe uses of nonrenewable energy sources except