The mass spectrum of an organic compound shows the relative abundances of M to be 74.44% and M 1 to be 16.91%. Assuming the peaks are caused by C12 and C13 isotopes, determine the number of carbon atoms in the compound. The natural abundance of C12 is 98.93%, and the natural abundance of C13 is 1.07%.

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices