Chemistry, 18.01.2021 21:10 samlolomg123
Element X has two naturally occurring isotopes, 65X (isotopic mass 65.0457 amu, abundance 20.53%) and 67X (isotopic mass 66.9704 amu, abundance 79.47%). Calculate the atomic mass of element X.
Answers: 1
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Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.
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Chemistry, 22.06.2019 21:00
The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
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Chemistry, 22.06.2019 22:00
4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.
Answers: 2
Chemistry, 23.06.2019 02:30
Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!
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Element X has two naturally occurring isotopes, 65X (isotopic mass 65.0457 amu, abundance 20.53%) an...
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