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Softa [21]
3 years ago
14

An element has the mass number 12 and atomic number 6. The number of neutron in it is?

Chemistry
1 answer:
slamgirl [31]3 years ago
8 0

Answer:

12-6=6

the answer is A)6

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How many electrons would an atom need to have before it can begin filling the 3s sub level?
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Well electrons are like electricity well it is partly if it went 3 sub levels the electrons would blow up some electricty<span />
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What are the uses of crude oil?
vampirchik [111]

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they are use to make  tar, asphalt, paraffin wax, and lubricating oils.

Explanation:

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Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
stiks02 [169]

Au³⁺ metal ion is reduced in the Au/Cr cell and Co²⁺ metal ion is reduced in the Co/Zr cell

<h3>What is a voltaic cell?</h3>

A voltaic cell is a cell that generates electricity by a spontaneous redox reaction.

It is an electrochemical cell, also known as a galvanic cell and  

Electrical energy is created by converting chemical energy.

Examples of voltaic cells include the dry cell, nickel-cadmium cell, lead storage cell, and fuel cells.

The half-cell reactions for each cell are given by

Au^{3+}(aq) + 3e^- \rightarrow Au(s) ; E° = 1.50 V

Cr^{3+}(aq) + 3e^- \rightarrow Cr(s) ; E° = –0.74 V

Co^{2+}(aq) + 2e^- \rightarrow Co(s) ; E° = –0.28 V

Zn^{2+}(aq) + 2e^- \rightarrow Zn(s) E° = –0.76 V

Thus, Au³⁺ is reduced in the Au/Cr cell and Co²⁺ is reduced in the Co/Zr cell

Learn more about Voltaic cell:

brainly.com/question/24002834

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4 0
2 years ago
Total number of electrons present in 1.8 grams of water is
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1 mole of water = 18 grams (you can find this by finding mass of two hydrogen and one oxygen which is (1*2) + 16 = 18)

1.8 grams = 0.1 moles

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(6.023*10^23)*(0.1)*10 = 6.023*10^23 electrons

5 0
4 years ago
Explain why the production of a gas in this experiment is or is not different from the formation of water vapor in the heating c
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The production of a gas is different because unlike the heating curve, there was no heat applied to this experiment, and the experiment was a chemical reaction.

<h3>What is a Heating curve?</h3>

This shows the relationship between the temperature of the heating system and the air temperature in the outer environment.

The chemical reaction emitted heat as against the other which involved heat application which is why water formation in this curve was different.

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6 0
2 years ago
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