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tester [92]
3 years ago
7

Which is true about the total mechanical energy in a closed system?

Chemistry
2 answers:
quester [9]3 years ago
4 0

Answer:

I believe that is C due to it being in a closed system

ryzh [129]3 years ago
3 0
It’s between C and B
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Identify the Lewis acid and Lewis base from among the reactants in each of the following equations.
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Answer:

Part A

Ag+ is the Lewis acid and NH3 is the Lewis base.

Part B

AlBr3 is the Lewis acid and NH3 is the Lewis base.

Part C

AlCl3 is the Lewis acid and Cl− is the Lewis base.

Explanation:

A Lewis acid is any specie that accepts a lone pair of electrons. Ag^+, AlBr3 and AlCl3 all accepted lone pairs of electrons according to the three chemical reaction equations shown. Hence, they are Lewis acids.

A Lewis base donates a lone pair of electrons. They include neutral molecules having lone pair of electrons such as NH3 or negative ions such as Cl- .

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