Chemistry, 25.02.2021 23:50 maddihamidou
The half-life of isotope XX is 2.0 years. How many years would it take for a 7.0 mg sample of XX to decay and have only 0.4375 mg of it remain?
Answers: 1
Chemistry, 22.06.2019 19:50
If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?
Answers: 2
Chemistry, 23.06.2019 05:30
Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?
Answers: 1
The half-life of isotope XX is 2.0 years. How many years would it take for a 7.0 mg sample of XX to...
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