This exercise will lead you to verify that the average atomic mass of magnesium is 24.31 amu, based on the following information:
isotope mass (amu) percent abundance
24Mg 23.985042 78.99%
25Mg 24.985837 10.00%
26Mg 25.982593 11.01%
The average atomic mass is the weighted average of the atomic masses of all isotopes.
What is the fractional abundance of 24Mg?
Answers: 1
Chemistry, 22.06.2019 16:50, TrueKing184
Answer asap need 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: 1
Chemistry, 22.06.2019 20:30, demarcuswiseman
From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.
Answers: 2
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