If there were 400g of U238 in a sample, how many grams would be left in 18 billion years
1-200
2-100
3-50
4-25

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

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