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Radda [10]
3 years ago
9

What is the only true way to tell if a chemical reaction has occurred? CFU

Chemistry
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

change of colour

Explanation:

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The formation of iodine is described by the following chemical equation:
olga nikolaevna [1]

Answer:

N2O2(g) +O2(g) ===> 2NO2(g)

Explanation:

For a nonelementary reaction, the reaction equation is described as the sum of all the steps involved. All these steps constitute the reaction mechanism. Each step in the mechanism is an elementary reaction. The rate law of the overall reaction involves the rate determining step (slowest step) in the reaction sequence.

Now look at the overall reaction 2NO(g) + O2(g) ---------> 2NO2(g)

The two steps in the mechanism are

2NO(g) --------->N2O2(g) (fast)

N2O2(g) +O2(g) -------> 2NO2(g) (slow)

Summing all the steps and cancelling out the intermediate N2O2(g), we obtain the reaction equation;

2NO(g) + O2(g) ---------> 2NO2(g)

Hence the answer.

7 0
3 years ago
Does the mass of water increase or decrease when it changes to ice
NikAS [45]

Answer:

The mass stays the same only volume changes, the volume decreases

Explanation:

The ice shrinks (decreases volume) and becomes more dense. The weight will not (and cannot) change.

4 0
3 years ago
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________ function by absorbing excess hydrogen or hydroxide ions.
Kay [80]

<u>Buffers</u> function by absorbing excess hydrogen or hydroxide ions.

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THe Answer is 105 J

hope this helps and please brainliest, I was first :)
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True or false<br><br> The right side of the heart pumps blood to the lungs to release oxygen.
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true

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