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NNADVOKAT [17]
3 years ago
15

how is the concept of effective nuclear charge used to simplify the numerous electron-electron repulsions in many-electron atom

Chemistry
1 answer:
kvv77 [185]3 years ago
8 0
We need more information to help please provide me with more information then @me when you do . ill be glad to help!
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2 years ago
If an electron fell to a lower orbit or energy level, energy would be
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Can I find the state of Ca3N2 using the solubility rules? If so how because there is no Nitride in the solubility tables, I don'
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The standard internal energy change for a reaction can be symbolized as Δ U ∘ rxn or Δ E ∘ rxn . For each reaction equation, cal
rosijanka [135]

Answer : The internal energy change is, -506.3 kJ/mol

Explanation :

Formula used :

\Delta H=\Delta U+\Delta n_gRT

or,

\Delta U=\Delta H-\Delta n_gRT

where,

\Delta H = change in enthalpy = -511.3kJ/mol=-511300.0J/mol

\Delta U = change in internal energy = ?

\Delta n_g = change in moles

Change in moles = Number of moles of product side - Number of moles of reactant side

According to the reaction:

Change in moles = 0 - 2 = -2 mole

That means, value of \Delta n_gRT = 0

R = gas constant = 8.314 J/mol.K

T = temperature = 25^oC=273+25=298K

Now put all the given values in the above formula, we get

\Delta U=\Delta H-\Delta n_gRT

\Delta U=(-511300.0J/mol)-[-2mol\times 8.314J/mol.K\times 298K

\Delta U=-511300.0J/mol+4955.144J/mol

\Delta U=-506344.856J/mol=-506.3kJ/mol

Therefore, the internal energy change is -506.3 kJ/mol

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3 years ago
What are all 18 groups of the periodic table?
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Go to this website for any Periodic table help. It helped me so much!

https://www.chemicool.com/


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