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stealth61 [152]
3 years ago
6

100 POINTS !!!! TO RIGHT AWNSER!!!

Chemistry
2 answers:
myrzilka [38]3 years ago
4 0

I think the answer is C


that was the right answer when I did the test!

Alecsey [184]3 years ago
3 0
The answer is going to be C) because 
A)We know that she put all three boxes in the window and let them sat their for a hour
B)We know that the boxes are the same size
C)She used three different materials,and she wants to measure the warmth of each box. To see which one is the warmest 
D)She never said anything about mass
Hopes This Helps:)
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The energy required to ionize boron is 801 kJ/mol. You may want to reference (Pages 93 - 98) Section 2.5 while completing this p
earnstyle [38]

Answer:

The frequency is  f =  2,01 * 10^{15} \  Hz

Explanation:

From the question we are told that

   The energy required to ionize boron is E_b  =  801 KJ/mol

Generally the ionization energy of boron pre atom is mathematically represented as

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Here  N_A is the Avogadro's constant with value N_A  =  6.022*10^{23}

So

      E_a  =  \frac{801}{6.022*10^{23}}

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Generally the energy required to liberate one electron from an atom is equivalent to the ionization energy per atom and this mathematically represented as

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=>     hf  =  E_a

Here h is the Planks constant with value h = 6.626 *10^{-34}

So

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=>      f =  2,01 * 10^{15} \  Hz

8 0
3 years ago
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