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Dmitry_Shevchenko [17]
2 years ago
8

Is gasoline evaporated a chemical change

Chemistry
2 answers:
Len [333]2 years ago
5 0
No. The only thing that changed was the looks of the gasoline, not the chemical components.
boyakko [2]2 years ago
5 0

Answer:

The correct answer is No

Explanation:

A chemical change is often characterized by the following

  • new substance is formed
  • not easily reversible
  • in most cases, process are represented by a chemical equation

The evaporation of gasoline does not meet any of the characteristics above. When, a gasoline evaporates, it is converted from it's liquid form to it's gaseous form hence <u>no new substance is formed</u>, and if this conversion is done in a controlled environment, the <u>gaseous form can be easily reversed back to it's liquid form</u> by cooling. There is <u>no chemical equation needed for this process</u> since no new substance is formed.

Because of the reasons provided earlier, evaporation of gasoline is a physical change and not a chemical change.

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When a solution of NaI reacts with a solution of AgNO3, what is the net ionic equation?
Leni [432]

Answer:

Ag⁺(aq) + I⁻(aq) → AgI(s)

Explanation:

Net ionic equation is a way to write a chemical equation in which you are listing only the species that are participating in the reaction.

In the reaction:

AgNO₃(aq) + NaI(aq) → AgI(s) + NaNO₃(aq).

The ionic equation is:

Ag⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + I⁻(aq) → AgI(s) + Na⁺(aq) + NO₃⁻(aq).

Now, listing only the species that are participating in the reaction:

<h3>Ag⁺(aq) + I⁻(aq) → AgI(s)</h3>

3 0
3 years ago
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Answer:

gamma rays > X-rays > ultraviolet radiation > visible light > infrared > radio waves.

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The order of decreasing energy of electromagnetic waves is;

gamma rays > X-rays > ultraviolet radiation > visible light > infrared > radio waves.

3 0
2 years ago
Oxygen, with an atomic number of 8, is a neutral atom and would have ___________ electrons in the first electron shell and _____
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In an atomic model that includes a nucleus, positive charge is
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<span>Because protons are positively charged and neutrons have no charge then it is safe to say that such an atomic model would have the positive charge concentrated in the center of an atom (option d).</span>
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