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icang [17]
3 years ago
6

Help me pleaseeeeeeee

Chemistry
2 answers:
Goshia [24]3 years ago
8 0

Answer:

4

hope it's helpful ❤❤❤❤❤❤

THANK YOU.

#

anzhelika [568]3 years ago
4 0

Answer:

4

Explanation:

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What is the energy of an electromagnetic wave with a frequency of 8•10^12 Hz?
aniked [119]

Hello!

Find the Energy of the Photon by Planck's Equation, given:

E (photon energy) =? (in Joule)

h (Planck's constant) = 6.626*10^{-34}\:J * s

f (radiation frequency) = 8*10^{12}\:Hz

Therefore, we have:

E = h*f

E = 6.626*10^{-34}*8*10^{12}

E = 53.008*10^{-34+12}

E = 53.008*10^{-22}

\boxed{\boxed{E = 5.3008*10^{-21}\:Joule}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

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2 years ago
The store paid 4.50 for a book and sold it for $7.65.what is the profit as a percent of the cost to the store? A. 3. 15% b. 58.8
xeze [42]

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Explanation:

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2 years ago
An atom has 20 protons, 26 neutrons, and 20 electrons. what could be the atomic mass of this atom?
Elanso [62]
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3 years ago
Describe what happens as ice changes to water.
morpeh [17]

Answer:

The energy of the particles increase and the molecules move more quickly.

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1: The atomic number of an atom is equivalent to which of the following?
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I think the correct answer among the choices presented above is option C. The <span>atomic number of an atom is equivalent to the number of protons in the nucleus. For a neutral atom, it is also the number of electrons since in a neutral atom protons and electrons are present in equal number.</span>
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