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Chemistry, 22.06.2019 23:00
What does a numerical subscript following an element in a chemical formula mean?
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Chemistry, 23.06.2019 13:30
Which of these statements describes the size of an atom? a. an atom is larger than a sheet of aluminum foil. b. an atom is small but can be seen with just our eyes. c. an atom is the size of a plastic building block. d. an atom is tiny and cannot be seen without magnification.
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Chemistry, 23.06.2019 14:20
Timed ! in which of these statements are protons, electrons, and neutrons correctly compared? quarks are present in protons and neutrons but not in electrons. quarks are present in protons, neutrons, and electrons. quarks are present in neutrons and electrons but not in protons. quarks are present in protons and electrons but not in neutrons.
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Chemistry, 23.06.2019 15:30
Sodium chloride can be made as follows: 2na + cl2 ? 2nacl i calculate the maximum amount of nacl possible if 2.3 g of sodium was reacted with excess chlorine. show all your workings.
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Which of the following statements best describes the layer of Earth just beneath the
outermost laye...
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