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Chemistry, 22.06.2019 04:40
Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)
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Chemistry, 22.06.2019 13:30
How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
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Chemistry, 22.06.2019 23:00
What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures
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Chemistry, 23.06.2019 00:50
The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as
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Assuming the octet rule is obeyed, how many bonds and how many lone pairs will atoms of oxygen (o) a...
Mathematics, 20.10.2019 01:50
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Mathematics, 20.10.2019 01:50
Mathematics, 20.10.2019 01:50
Mathematics, 20.10.2019 01:50
English, 20.10.2019 01:50
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