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?