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Orlov [11]
3 years ago
15

Physical or Chemical Changes

Chemistry
1 answer:
Kisachek [45]3 years ago
4 0
Chemical change . hope this helps:))))))))
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1 A 3.80 g sample of bronze was dissolved in sulphuric acid. The copper in alloy reacted with
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yeyeye

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Name the salt used in plastering the fractured bone​
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Draw the Lewis structure for BCl3. How many single bonds, double bonds, triple bonds, and unshared pairs of electrons are on the
andreev551 [17]

Answer :  The number of single bonds, double bonds, triple bonds, and unshared pairs of electrons on the central atom are, 3, 0, 0 and 0 respectively.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, BCl_3

As we know that boron has '3' valence electrons and chlorine has '7' valence electrons.

Therefore, the total number of valence electrons in BCl_3 = 3 + 3(7) = 24

According to Lewis-dot structure, there are 6 number of bonding electrons and 18 number of non-bonding electrons.

From the Lewis-dot structure we conclude that,

The number of single bonds, double bonds, triple bonds, and unshared pairs of electrons on the central atom are, 3, 0, 0 and 0 respectively.

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Sodium metal is added to a solution of magnesium chloride. Will a reaction occur? If so, what reaction will take place?
Black_prince [1.1K]
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liberstina [14]

Answer:

The answer is D.

Explanation:

8 0
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