If 2.27 pCi [1 pCi (picocurie) = 1 x 10-12 Ci] of radioactivity from 239Pu is emitted in a 95-kg human for 65 h, and each disintegration has an energy of 8.25 x 10-13 J, how many grays does the person receive? Enter your answer in scientific notation. x 10 Gy

Describe the process of catalytic cracking used in the petroleum refining industry Your answer must also include: ·      A balanced chemical equation, include physical states and reaction conditions. ·      Example of a product formed from catalytic cracking in petroleum refining, and its use. All sources need to be acknowledged using Harvard referencing please.

which of the following are true about waste disposal of polymers?

This is not really a question but, I have a presentation to do on one of the following polymers. I was just wondering if you can pick the top 5 best out of them all. I will include the questions I will be researching, I just want an expert opinion on which polymer would be th best for these questions.  :) These are the questions that I will be resaerching about:  List its current uses and why we use it for those applications. What is it? What are its components (i.e., its monomers)? How is the polymer manufactured? What is the chemical reaction that occurs in its creation? What is the chemical reaction that occurs in its degradation? What are the environmental consequences of its production?  What are the environmental consequences of its disposal? Propose a solution to the environmental consequences you listed above. For example, could something about the polymer be changed to alleviate the problems or could another, safer polymer be used in its place? And these are the polymers I…