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Bogdan [553]
3 years ago
14

An object has a negative charge if its atoms what

Chemistry
1 answer:
jonny [76]3 years ago
6 0

Answer:

An object has a negative charge if it's atoms have more electrons. On the other hand if an object had more protons, then it would have a positive charge.

Hope this helps!!

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Free-energy change, ΔG∘, is related to cell potential, E∘, by the equationΔG∘=−nFE∘where n is the number of moles of electrons t
mart [117]

Answer:

a)\Delta G=372490 J

b)\Delta G=-568614 J

Explanation:

a) The reaction:

Mg(s) +Fe^{2+}(aq) \longrightarrow Mg^{2+}(aq) + Fe(s)

The free-energy expression:

\Delta G=-n*F*E

E=E_{red}-E_{ox]

The element wich is reduced is the Fe and the one that oxidates is the Mg:

-0.44V=E_{red}-(-2.37V)=1.93V

The electrons transfered (n) in this reaction are 2, so:

\Delta G=-2mol*96500 C/mol * 1.93 V

\Delta G=-372490 J

b) If you have values of enthalpy and enthropy you can calculate the free-energy by:

\Delta G=\Delta H - T* \Delta S

with T in Kelvin

\Delta G=-675 kJ*\frac{1000J}{kJ} - 298K*-357 J/K

\Delta G=-568614 J

7 0
2 years ago
Step I of the proposed mechanism involves the collision between NO2 and F2 molecules. This step is slow even though such collisi
pogonyaev

Answer:

bob

Explanation:

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7 0
3 years ago
I need help with the blanks
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2 years ago
Why does increasing concentration usually increase reaction rate?
Alex Ar [27]
The correct answer is C) There are more particle collision

With more particle collision, more reactions are created.
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3 years ago
Read 2 more answers
What point A on the phase diagram called?
Mariana [72]

Answer:

D) the critical point

Explanation:

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