Chemistry, 01.07.2019 17:30 eeeeee9848
In a mass spectrum, there are two peaks, one at m/z 63.0 with percentage abundance 69.1%, and another peak at m/z 65.0 with percentage abundance 30.9%. determine the relative atomic mass (ar) for this element, giving the answer to 3 significant figures.
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Chemistry, 22.06.2019 06:30
How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned
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Chemistry, 22.06.2019 18:00
Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 3
Chemistry, 23.06.2019 01:00
If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?
Answers: 1
In a mass spectrum, there are two peaks, one at m/z 63.0 with percentage abundance 69.1%, and anothe...
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