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kotykmax [81]
3 years ago
13

You find a nail on the ground in the parking lot, in a small puddle of water. Rust has formed on the outside of the nail. Was th

is a physical or chemical change? Explain
Chemistry
2 answers:
pantera1 [17]3 years ago
6 0
Something with rust means that it has oxidized which is a chemical change. The reason it is a chemical change is because the iron had a chemical reaction with the oxygen and water which resulted in the creation of a new compound (that is a chemical change). You can't change the nail to not having any rust form because the rust will still exist ( If you clean it the rust will still be there but on another object )
Luden [163]3 years ago
5 0
Physical change. There was no chemical to make the nail rust
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Answer:

Yes chemistry. Try to add then multiply the top. Get the moles and you will find it.

Explanation:

Try to add then multiply the moles in the equation

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Having studied the data for patterns and trends, you should now be able to draw
avanturin [10]

Answer:

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3 years ago
Use bond energies from Table 10.3 in the textbook to estimate the enthalpy change (ΔH) for the following reaction. C2H2(g)+H2(g)
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\Delta H= {\text {sum of bond energies of reactants}}-  {\text {sum of bond energies of products}}

\Delta H= {1B.E(C≡C)+2B.E(C-H) +1B.E(H-H)} - {1B.E(C=C)+4B.E(C-H)}

\Delta H= {1B.E(835kJmole^{-1})+2B.E(414kJmole^{-1}) +1B.E(436.4kJmole^{-1})} -  {1B.E(620kJmole^{-1})+4B.E(414kjmole^{-1})}

=176.6kJmol^{-1}







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4 years ago
What charge does nitrogen form when it satisfies the octet rule?
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The answer should be B: -3
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3 years ago
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