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3 years ago

The characteristic bright–line spectrum of potassium is produced when electrons

Chemistry

1 answer:

OLEGan [10]3 years ago

8 0

Answer: B.

Explanation:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Hope this helps!

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A scientist isolates a water-soluble compound from spider venom. The substance has nitrogen, carbon, hydrogen, and oxygen in its

Vsevolod [243]

Answer:

b. protein

Explanation:

Proteins are biopolymers basically made of carbon, hydrogen, oxygen and nitrogen.

Triglycerides are made of a glycerol molecule esterified by three fatty acids.

Polysaccharides are carbohydrates, and therefore contain carbon, hydrogen, and oxygen.

The mineral salt contains mostly sodium chloride, although it contains some other minerals such as magnesium, potassium, iodine, among others.

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4 years ago

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Scorpion4ik [409]

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3 years ago

At what temperature are the liquid and the vapour of Bromine in equilibrium (e.g. boiling point)?

irina [24]

Explanation:

Boiling point is defined as the point at which liquid state and vapor state of a substance are existing in equilibrium.

Equilibrium is defined as the state in which rate of forward and rate of backward reaction are equal to each other.

For example, $Br(l) \rightleftharpoons Br(g)$

So, when we boil bromine which is present in liquid state then at the boiling point its vapors will exist in equilibrium. And unless all the liquid state of bromine will not convert into vapors its temperature will not change.

Therefore, we can conclude that at boiling point the liquid and the vapur of Bromine are in equilibrium.

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3 years ago

I have a question on my Chem homework. It's asking "How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.

evablogger [386]

Here, Molar mass of N2O4 = 92.02 g/mol
So, Number of molecules in 1 mole (92.02 g) = 6.023 * 10²³
Number of molecules in 76.3 g = 6.023 * 10²³ / 92.02 * 76.3
= 6.023 * 10²³ / 1.20
= 5 * 10²³

In short, Your Answer would be approx. 5 * 10²³ molecules

Hope this helps!

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4 years ago

Please answer! I will mark you as brainlist!

blagie [28]

Answer:

a) no

b) no

c) yes

d) yes

Explanation:

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3 years ago