Chemistry, 13.11.2020 20:00 Nathaliasmiles
Which observation is the best indication that a chemical reaction has occurred?
A. Change in temperature
B. Presence of ashes
C. Change from liquid to gas
D. Absence of fizzing
Answers: 3
Chemistry, 21.06.2019 15:30, likajamison7769
The wilson chamber is used to study: direction, speed, and distance of radioactivity the intensity of radiation the appearance of individual atoms all of the above
Answers: 1
Chemistry, 21.06.2019 19:00, luludawn2455
Dying the folding patterns of protein molecules can microbiologists better understand cellular processes as well as some diseases, such as alzheimer’s, that are caused by proteins that have misfolded. the folding of these complicated molecules can be simulated on computers, but it takes a lot of processor power and time for even expensive supercomputers to do this. a group of researchers at stanford university developed software that can be used to distribute the processing of data to anyone who is willing to donate time on their idle personal computers. as a result, the researchers have been able to achieve protein-folding simulations that are far better than those other computing methods have done. which statement best describes the work of these researchers? the work is not scientific because the data are not processed in one location. the work is not scientific because the simulations are not reproducible. the researchers applied creativity to solve a problem in running an experiment. the researchers used only well-established scientific techniques.
Answers: 3
Chemistry, 22.06.2019 07:30, bbyniah123
11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
Answers: 3
Chemistry, 23.06.2019 00:30, ejuarez2020
When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two
Answers: 2
Which observation is the best indication that a chemical reaction has occurred?
A. Change in temper...
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