Chemistry, 03.02.2020 22:02 btsheygirl
Question 1.
an isotope has a half-life of 6 hours. if the original sample had a mass of 500 grams, how much of the sample would be left after 30 hours. be sure to identify the number of 1/2 life that occurred and to explain how you obtained this answer.
question 2.
calculate the percent by mass of water in copper (ii) fluoride tetra hydrate. you must show all of your work to earn credit. atomic masses of each element: cu = 64, f = 19, o = 16, h= 1
question 3.
if the percent (mass/mass) for a solute is 16% and the mass of the solution is 400 g, what is the mass of solute in solution?
a.6400 grams
b. 25 grams
c.64 grams
d. 0.04 grams
Answers: 3
Chemistry, 22.06.2019 19:30
Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol
Answers: 3
Chemistry, 22.06.2019 20:00
Listenbase your answer to the question on the information below.nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body.cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment.which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61
Answers: 2
Question 1.
an isotope has a half-life of 6 hours. if the original sample had a mass of 500 g...
an isotope has a half-life of 6 hours. if the original sample had a mass of 500 g...
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