Chemistry Homework Solutions

Ingestion of I-131 and U-238. Which is worse?

Which would you be more concerned about ingesting – radioactive iodine or U-238? Why

What's an example of an environmental pollutant that does not directly react with the human body?

What's an example of an environmental pollutant that does not directly react with the human body?

Glass and Asbestos with identical composition

It is possible to have glass and asbestos with identical composition (e.g. Na2Si03), and yet one is considered hazardous and the other is not. Why?

Hydrogen cyanide

In less than a 125 words, with Hydrogen Cyanide -How can we most likely be exposed to it -How we can minimize our dose -the most likely route of entry into the body and target organ -A brief description of its toxic effect hide problem

Chemistry - Change in pH

Following an algal bloom, the pH of a lake increases from 7.3 to 10. If the pH is due to an increase in OH- ions via the reaction: HCO3 --> OH- + CO2, how many moles of OH- were released to raise the pH to 10?

Average daily dose

average daily dose: only need the water ingestion completed

What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?

What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?

In this continuous process, "phosphoric acid and ammonia are mixed, and a non-hazardous product, diammonium phosphate (DAP) results if the reaction of ammonia is complete.

Attached is a very simple process flow diagram. In this continuous process, "phosphoric acid and ammonia are mixed, and a non-hazardous product, diammonium phosphate (DAP) results if the reaction of ammonia is complete. If the proportion of phosphoric acid is reduced, the reaction is incomplete, and ammonia is evolved. Reduction ...continues

How were FREONS developed for use in refrigeration?

How were FREONS developed for use in refrigeration? What were the advantages of these chlorofluorocarbons over previously used cryogens? Outline why the use of FREONS has now been discontinued.

Radioactivity

The half-life of tritium is approximately 12 years. What will be the molar ratio of tritium to helium-3 in a sealed sample after 25 years?

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