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4 years ago

Which of the following is possible for aluminum to have a full outer shell?

Chemistry

2 answers:

lesya [120]4 years ago

8 0

B. Three are lost creating Al+3. Because atoms have and equal amount of Protons and Electons when neutral losing 3 electrons will create a positive Al ion Al+3

liubo4ka [24]4 years ago

4 0

The answer is; B.

This is called an aluminum cation. Aluminum forms bonds with anions in which it can donate its three valence electrons so it can achieve stable electron configuration. Stable electron configuration is having 8 electron in the outer shell. By donating its 3 outer valence electrons, the aluminium will have the more stable 2.8 electron configuration. The +3 means it has lost 3 electrons hence has 3 extra protons (that are not matched by an electron) in its nucleus (also indicating its valency).

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How many moles of Al are needed to react completely with 1.2 moles of Fe0

DIA [1.3K]

0.8 moles

3 moles of feO gives you 2 moles of Al and 1.2 of your moles should give you 1.2 divided by 3*2 so it equals 0.80 moles

Right?

7 0

3 years ago

In an electron dot diagram of propane (C3H8), how many double bonds are present?

NeX [460]

Answer:- none

Explanations:- For naming hydrocarbons we use the suffix -ane, -ene and -yne.

-ane is used when we have only single bonds between all carbons. -ene is used if there is any double bond between two carbons and the -yne is used if there is any triple bond between two carbons.

The given name of the compound is propane. It ends at -ane and so it's an alkane and must have single bonds between all the carbons it has. So, there are zero double bonds present in $C_3H_8$ .

This is also clear from the below lewis dot structure of the compound.

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3 years ago

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Fynjy0 [20]

Answer:

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3 years ago

How does a hydroelectric power plant convert energy?

Oksana_A [137]

Answer:

D. As water flows through the channels toward the turbines, it has kinetic energy. This is changed to mechanical energy as the water turns the turbines. Then the mechanical energy of the turbines is changed to electrical energy by the generator.

Explanation:

I hope this helps. :)

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3 years ago

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Which of the following is an example of chemical weathering?

REY [17]

Answer:

the answer is C acid dissolving limestone

Explanation:

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2 years ago

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