Chemistry, 18.01.2020 06:31 laniflower6
The concentration of calcium ion in a town’s supply of drinking water is 0.0020 m. (this water is referred to as hard water because it contains such a large concentration of ca21.) suppose the water is to be fluoridated by the addition of naf for the purpose of reducing tooth decay. what is the maximum concentration of fluoride ion that can be achieved in the water before precipitation of caf2 begins? will the water supply attain the level of fluoride ion recommended by the u. s. public health service, about 5 × 1025 m (1 mg fluorine per liter)?
Answers: 1
Chemistry, 21.06.2019 14:30
Heat flow inside earth activity i chose chemistry cause there is no science alert! the newspaper has been hacked, and all of the headlines have been changed to reflect old legends. it is your task to make sure they are corrected. choose one of the newspaper headlines. you will rewrite the headline and a one-to-two-paragraph article to make the news scientifically correct. be sure to include the following in your corrected newspaper article: new title reflecting correct information detailed information about the processes and tectonic plate interactions that are causing the geological event to occur real-world example of where to find the geological event on earth (picture and location) also review the grading rubric before you begin.
Answers: 1
Chemistry, 22.06.2019 11:00
Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.
Answers: 2
Chemistry, 22.06.2019 14:00
8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.
Answers: 3
The concentration of calcium ion in a town’s supply of drinking water is 0.0020 m. (this water is re...
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