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Chemistry, 21.06.2019 23:00
A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?
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 00:20
What are the spectator ions in 2h+ + so42- + ca2+ + 2r ā caso4 + 2h+ + 21?
Answers: 1
Chemistry, 22.06.2019 12:00
What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom
Answers: 1
How many atoms of gold are in 112 grams of gold?...
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