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Hunter-Best [27]
3 years ago
6

Differentiate between Physical and chemical changes​

Chemistry
2 answers:
I am Lyosha [343]3 years ago
7 0
Physical changes are things like rearranging your room, it may look different but the chemical makeup is the exact same as before. Chemical changes are what happens when wood is burnt to charcoal, or when you dissolve salt in water. Hope this helped!
Marina CMI [18]3 years ago
5 0

Answer:

<em>In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.</em>

<h3> I HOPE THIS WILL HELP YOU IF NOT THEN SORRY HAVE A GREAT DAY:)</h3>

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How is the number of electrons in an element determined?
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?Al + ?H2SO4 → ?Al2(SO4)3 +3H2
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The answer is: 27 grams of aluminium.

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5 0
3 years ago
How many moles of Fluorine (F2) are<br><br> needed to completely react 8.0<br><br> moles of NF3?
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Answer:

12 moles of F₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

N₂ + 3F₂ —> 2NF₃

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Finally, we shall determine the number of mole of F₂ needed to produce 8 moles of NF₃. This can be obtained as illustrated below:

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of NF₃.

Therefore, Xmol of F₂ will react to produce 8 moles of NF₃ i.e

Xmol of F₂ = (3 × 8)/2

Xmol of F₂ = 12 moles

Thus, 12 moles of F₂ is needed for the reaction.

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