The table shows the amount of radioactive element remaining in a sample over a period of time.

Part 1: what is the half life of the element? Explain how you determined this.

Part 2: how long would it take 308 g of the sample to decay to 4.8125 grams? Show your work or explain your answer?

* please explain the answer is easy to understand terms, thank you*

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