Chemistry, 18.07.2019 10:10 kitykay2399
The radioisotope cesium-137 has a half-life of 30 years. a sample decayed at the rate of 544 counts per minute in the year 1985. in what year will the decay rate be 17 counts per minute?
Answers: 1
Chemistry, 22.06.2019 04:00
Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.
Answers: 3
Chemistry, 22.06.2019 04:30
Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.
Answers: 1
Chemistry, 22.06.2019 15:00
20 pts âźď¸ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraftâs weight the greatest?
Answers: 2
Chemistry, 22.06.2019 21:30
Under which circumstances are kp and kc equal for the reaction aa(g)+bb(g)âcc(g)+dd(g)?
Answers: 2
The radioisotope cesium-137 has a half-life of 30 years. a sample decayed at the rate of 544 counts...
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