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seropon [69]
3 years ago
14

Which of the following is a synthesis reaction?

Chemistry
2 answers:
Allushta [10]3 years ago
7 0

Answer:  4 A1+3 02 → 2 Al2O3

Explanation: Two different atoms combines together to produce a compound.

Orlov [11]3 years ago
6 0

Answer:

c) Fe + CuCl2 → FeCl2 + Cu

Explanation: Synthesis Reaction is when you get same thing on the other side even if its not in the same order after you add the components.

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How many electrons does calcian have to gain or lose to have 8 valence electrons
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two electrons

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Calcium atoms will lose two electrons in order to achieve the noble gas configuration of argon.

8 0
2 years ago
Why do we use a double arrow in the dissociation equation for a weak acid answer?
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Answer is: because weak acids do not dissociate completely.

The strength of an Arrhenius acid determines percentage of ionization of acid and the number of H⁺ ions formed. <span>
Strong acids completely ionize in water and give large amount ofhydrogen ions (H</span>⁺), so we use only one arrow, because reaction goes in one direction and there no molecules of acid in solution.

For example hydrochloric acid: HCl(aq) → H⁺(aq) + Cl⁻(aq).

<span> Weak acid partially ionize in water and give only a few hydrogen ions (H</span>⁺), in the solution there molecules of acid and ions.

For example cyanide acid: HCN(aq) ⇄ H⁺(aq) + CN⁻(aq).


4 0
3 years ago
Which two reactions are opposites of each<br> other?
Alex17521 [72]
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6 0
3 years ago
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The Percentage of salt-water vs. fresh-water:???%
I am Lyosha [343]

Answer:

<em><u>Over 96 percent is saline. Of total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground.</u></em>

6 0
2 years ago
You have a square with a Perimeter of 16 in,, what is the Area of the square after scaling it by 5?​
Novosadov [1.4K]

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f the figure is a square with a perimeter of 16 inches, then each side of the square is 4 inchest in length. Area is found by multiplying the length x the width. For a square, the length and width are the same. A = 16 sq

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8 0
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