Which of the following is equal to one molecule of calcium atoms?
6.022x10^23 molecules of Ca
...
Answers: 3
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, 22.06.2019 22:10
Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water
Answers: 3
Chemistry, 23.06.2019 04:20
Calculate the mass of 0.750 mol of the following substance. na3po4.
Answers: 1
Chemistry, 23.06.2019 15:30
The smallest species of chameleon is found only on an island in madagascar the island has unique geological and climatic conditions that are essential for the chamaeleon to survive the chamaeleon was recently declared an endangered species years from now why won’t this chameleons remains make for a good index fossil
Answers: 3
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