Chemistry, 29.10.2020 20:50 chinadoll24
20 points
A copper wire was cut into pieces and dropped into a test tube containing acid, Bubbles formed immediately, the liquid in the test tube turned green, and the pieces of wire were no longer visible, which most likely happened to the pieces of copper wire?
А. The copper wire was chemically changed when it was cut and placed in the acid,
B the copper wire was physically changed when it was cut and placed in the acid,
C The copper wire was physically changed when it was cut and chemically changed when it was placed in the acid,
D The copper wire was chemically changed when it was cut and physically changed when it was placed in the acid,
Answers: 1
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Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.
Answers: 1
20 points
A copper wire was cut into pieces and dropped into a test tube containing acid, Bubbles f...
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