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Anettt [7]
2 years ago
10

What are the names of the elements which are gases in the air

Chemistry
2 answers:
Yakvenalex [24]2 years ago
6 0
The molecules of two different elements, nitrogen and oxygen, make up about 99 percent of the air.


have a good day !! :)
jolli1 [7]2 years ago
3 0
Oxygen
nitrogen
carbon dioxide
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1. the purpose of the aqueous solutions in a galvanic cell is to?
ludmilkaskok [199]

Answer:

1. The correct option is;

c. maintains charge balance in the cell

2. The correct option is;

c. +3.272 V

Explanation:

The aqueous solution in a galvanic cell is the electrolyte which is a ionic solution containing that permits the transfer of ions between the separated compartment of the galvanic cell such that the overall system is electrically neutral

Therefore, the aqueous solution maintains the charge balance in the cell

2. Here we have;

B₂ + 2e⁻ → 2B⁻ Ecell = 0.662 V

A⁺ + 1e⁻ → A Ecell = -1.305 V

Hence for the overall reaction, we have;

2A + B₂ → 2AB gives;

(0.662) - 2×(-1.305)  = +3.272 V.

4 0
3 years ago
Why is a terminal alkyne favored when sodium amide (NaNH2) is used in an elimination reaction with 2,3-dichlorohexane
mihalych1998 [28]

The question is incomplete, the complete question is;

Why is a terminal alkyne favored when sodium amide (NaNH2) is used in an elimination reaction with 2,3-dichlorohexane? product. A) The terminal alkyne is more stable than the internal alkyne and is naturally the favored B) The terminal alkyne is not favored in this reaction. C) The resonance favors the formation of the terminal rather than internal alkyne. D) The strong base deprotonates the terminal alkyne and removes it from the equilibrium.

E) The positions of the Cl atoms induce the net formation of the terminal alkyne.

Answer:

E) The positions of the Cl atoms induce the net formation of the terminal alkyne.

Explanation:

In this reaction, sterric hindrance plays a very important role. We know that sodamide is a strong base, it tends to attack at the most accessible position.

The first deprotonation yields an alkene. The strong base attacks at the terminal position again and yields the terminal alkyne. Thus the structure of the dihalide makes the terminal hydrogen atoms most accessible to the base. Hence the answer.

7 0
3 years ago
A single carbon atom can be form a maximum of ________ covalent bonds.
german
The answer is:  "FOUR  (4)" .
___________________________________________________
5 0
3 years ago
This isn't exactly for homework, but what would happen if a human was suddenly frozen one moment, but then burning the next? Wou
Troyanec [42]

Answer:

That's a really cool question. Is a human was frozen, do you mean like, in a cold environment or literally ice? If so ice, then they might die from suffocation? But if they were burning the next, either in the desert or on fire, they might have already died from hypothermia or suffocation from the ice? Dunno.

Explanation:

B,,,Brainliest please?

4 0
3 years ago
Read 2 more answers
What two factors speed up rates of chemical reaction and weathering in rocks and soils?
Firdavs [7]

Answer:

Moist and warm temperatures

Explanation:

8 0
3 years ago
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