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Sati [7]
3 years ago
15

When an electron of an atom returns from an excited state to the ground state, it emits energy in the form of a photon. How does

the change in energy level compare to the energy of the emitted photon?
Chemistry
1 answer:
Andrej [43]3 years ago
8 0
The change in energy level is equivalent to the energy of the released photon. This is related by Planck's equation:
E = hcf
The higher the energy change, the greater the frequency, f, of the photon.
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When equal moles of an acid and a base are mixed, after reaction the two are compounds are said to be at the _______________. Se
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Isotope b has a half-life of 3 days. a scientist measures out 100 grams of this substance. after 6 days has passed, the scientis
Brilliant_brown [7]
So half life is the time taken for a sample to decay to half its original mass, its a constant and applies to any original mass, it could be 5g or 1kg, it will take the same amount of time for the original mass to half. In this case the half life is 3 days.

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6 0
3 years ago
A rectangular fence is 3 times as long as it is wide. The perimeter is 60ft. Find the dimensions of the fence
Mashutka [201]

Answer:

The length of the fence is 22.5ft and the width of the fence is 7.5ft.

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To solve this problem we will turn this question into an equation.

The equation for the perimeter of a rectangle is 2l + 2w = perimeter.

In the question we were given the perimeter so we can go ahead and plug this in.

2l + 2w = 60

In the question we are also told that the fence is 3 times as long as it is wide. This means that 1l = 3w. We can now subsitute l for 3w so that we only have one variable.

2(3w) + 2w = 60

Now we can simply use algebra to solve for w.

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Now that we know the value of w we can find the value of l since we know 1l = 3w.

l = 3w

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l = 22.5

The length of the fence is 22.5ft and the width of the fence is 7.5ft.

7 0
3 years ago
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