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3 years ago

Explain the law of conservation of energy.

Chemistry

2 answers:

frosja888 [35]3 years ago

8 0

Answer:

Energy cannot be destroyed or created but can be transformed from one form to another

Ulleksa [173]3 years ago

6 0

<h2>Energy is conserved. It never appears or disappears. It just changes from one kind of type to another. The Universe contains the same amount of energy it started with. This amount can never change.</h2><h2></h2>

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The Balmer Series of lines in the hydrogen atom was very important in the history of physics and astronomy. What made it so impo

True [87]

Answer:

C) When electrons change levels to produce the Balmer series, the emitted light is in the visible part of the spectrum

Explanation:

The Balmer Series of lines in the hydrogen atom was very important in the history of physics and astronomy. What made it so important?

A) It helped Rutherford explain the workings of the atomic nucleus.

B) Balmer's experiments with these lines helped prove Wien's Law.

C) When electrons change levels to produce the Balmer series, the emitted light is in the visible part of the spectrum.

D) The Balmer series of lines can only be observed from outer space; so the competition to see these lines led to the space race.

E) Mr. Balmer never got the Nobel prize, which made everyone in the field of spectroscopy so angry, they worked extra hard.

the most appropriate will be

C) When electrons change levels to produce the Balmer series, the emitted light is in the visible part of the spectrum

Balmer series of hydrogen lines. These lines are emitted when the electron in the hydrogen atom moves from the orbital n = 3 or greater shell down to the n = 2 shell/orbit. ... Energy is emitted from the atom when the electron leaps from one orbit to another closer to the nucleus.

Wiens law has to do with the radiation of a black body.

3 0

3 years ago

A squirrel ran 20 meters along the fence at a constant speed for 10

Black_prince [1.1K]

Answer:

It's D

Explanation:

Sorry for the late answer. Since the squirrel ran constant speed for 10 seconds and it ran 20 meters the first point would be at (10,20) then since it stopped to rest for 15 seconds the next point would be (25,20) finally since it ran another 30 meters for 15 more seconds the next point would be at (40,50). Sorry if the answer isn't the best, i'm bad at explaining ;w;

6 0

2 years ago

Click the "draw structure" button to launch the drawing utility. under certain reaction conditions, 2,3−dibromobutane reacts wit

REY [17]

Answer:

Explanation:

According to this. Let's analize the possible products a, b and c.

First, the problem states that we have 2 eq. of base, For this case, let's assume it's KOH. Now, As we are doing a reaction with base, means that this reaction can only take places under conditions of SN2 and E2, a fast reaction that is taking place in only 1 step.

With this in mind, let's analyze product a. This states that it has two sp hybridized carbon, in other words, a triple bond between two carbons. So the product is with no doubt, an alkyne.

Product b has only one sp hybridized carbon, which means that this carbon should cannot be an alkyne because we need two carbon atoms. The only way to have one atom of C sp hybridized, is with two double bonds, so product b would have to a alkene with two double bonds.

Product c do not have sp hybridized carbon, therefore, it only has two double bonds in two different Carbon atoms, so it's another alkene with two double bonds, but in two different atoms of carbon.

Picture attached show the product a, b and c. Hope this can help

4 0

2 years ago

What is the maximum mass of ethyl alcohol you could boil with 1000 j of heat, starting from 22 ∘c?

kramer

solution:

1000 = m*2400*(78-22) + m*8.79*10^5

1000= 134400m + 879000m

1000= 1030200m

m = 1000/1013400

m= 1013.4 grams

the final answer is 0.9706 grams

5 0

3 years ago

2 HCl + 1 Zn -> 1 H2 + ZnCl2 what type of reaction is this

Salsk061 [2.6K]

Answer:

Single replacement reaction

Explanation:

3 0

3 years ago