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Chemistry, 22.06.2019 00:00
What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17
Answers: 1
Chemistry, 22.06.2019 00:00
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
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Chemistry, 22.06.2019 16:00
How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?
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History, 29.07.2019 13:00
History, 29.07.2019 13:00
History, 29.07.2019 13:00
Chemistry, 29.07.2019 13:00
Social Studies, 29.07.2019 13:00
History, 29.07.2019 13:00
History, 29.07.2019 13:00
History, 29.07.2019 13:00
Biology, 29.07.2019 13:00
History, 29.07.2019 13:00
Biology, 29.07.2019 13:00
Biology, 29.07.2019 13:00
Social Studies, 29.07.2019 13:00
History, 29.07.2019 13:00