Answer:
The acidity level of water is measured by the pH scale. Pure water has a pH of 7, which is neutral. However, natural rainwater actually has a pH of 5.6 because it gets exposed to the gases in the atmosphere, making it a bit acidic. True acid rain will have a pH level measuring from 5.0-5.5.
that will be temperature cause the mass will either have to increase or decrease
The correct answer is "<span>are high exposures over short times and associated with a specific cause"
Acute exposure is defined as exposures to high amounts of toxic substance over a period of time associated with a specific cause. For instance, acute exposure to malathion (insecticide) will produce acute effects of acute paralysis or weakness, respiratory depression, or even death. While usually fatal, it is usually treatable.</span>
