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statuscvo [17]
3 years ago
8

I don’t understand this, can you help me?

Chemistry
1 answer:
vlada-n [284]3 years ago
3 0
An atom becomes stable if it has a full and complete ring. 2 of the choices are wrong off the start because you can't gain electrons and have a net positive charge, nor can you lose electrons and have a net negative charge. That leaves us with Option A or D. As I said earlier, an atom becomes stable if it has a full and complete ring. Obviously, if you lose 3 electrons from the last ring, the atom would be stable (because the 2nd ring is now full), and it also would have a net positive charge because it lost electrons.
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Which represents the correct equilibrium constant expression for the reaction below? Cu(s)+2Ag+(aq)<->Cu2+(aq)+2Ag(s)
balu736 [363]
K(eq) = concentration of products/concentration of reactant         = [Cu+2] / [Ag+]^2 
Activity of pure solid and liquid is taken as 1.
Hence last option is correct.
Hope this helps, have a great day ahead!
I hope this helps you alot
:)
:)
:0

4 0
3 years ago
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What is the energy of an electromagnetic wave with a frequency of 8 x 10^12
omeli [17]

Answer:

Energy, E=5.3\times 10^{-21}\ J

Explanation:

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E=6.63\times 10^{-34}\times 8\times 10^{12}\\\\E=5.3\times 10^{-21}\ J

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4 0
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5 0
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Katyanochek1 [597]

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7 0
2 years ago
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What mass of Na2SO4 is needed to make 2.5L of 2.0M solution? (Na=23g; S=32g; O=16g)
zaharov [31]
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then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g
8 0
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