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ki77a [65]
3 years ago
12

20 POINT QUESTION

Chemistry
1 answer:
NNADVOKAT [17]3 years ago
5 0

Answer:

Both atoms have Zeff of 1; therefore, Atom D is above Atom E in the same column because of the additional energy level.

Explanation:

Both atoms have valence electron of 1 which makes them to be in the same group 1 but atom E has four valence shell/energy while atom D has only three.

Due to the difference in their electronic shells/energy, atom D will be directly above atom E in the periodic table.

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Describe an experiment to show that water contains hydrogen and oxygen only​
kondaur [170]

Answer:

Electrolysis

Explanation:

The electrolysis of water is one such experiment that shows that water is made up of hydrogen and oxygen atoms only in the ratio of 2 to 1.

In the electrolysis of water, electricity is passed through acidified water to cause it to decompose.

The electrolysis of water is also known as the electrolysis of dilute tetraoxosulphate  (VI) acid.

At the cathode, H⁺ ions are discharged and hydrogen gas is liberated:

               2H⁺       +     2e⁻     →        H₂

At the anode, both the sulfate ion and hydroxyl ions migrate to this electrode. Only the OH⁻ is selected for preferential discharge due to its lower position in that activity series.

         4OH⁻  →   2H₂O    +    O₂     +     4e⁻

Oxygen gas is produced at the anode.

This electrolysis demonstrates the volumetric composition of water that is, 2 volumes of hydrogen at the cathode and 1 volume of oxygen at the anode.

5 0
3 years ago
QUESTION 17
borishaifa [10]

Question 17:

False; cutting hair would change what it looks like but, braiding it keeps it the same substance it is.


Question 18 :

My best guess would either be A or D. I would lean more towards D because if there are different mixtures then it depends on what you are mixing.


Hope it helps in some way. <3

5 0
3 years ago
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VARVARA [1.3K]

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I think the answer is A

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3 years ago
What is a disadvantage of a series circuit?
Digiron [165]
The answer is B

If one circuit fails, it is most likely that all the components in the circuit will fail.
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Answer:

37.8 Degrees Celcius is your answer.

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