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Lostsunrise [7]
3 years ago
15

Convert 8.43 x 1024 atoms of carbon to moles of carbon.

Chemistry
1 answer:
Sindrei [870]3 years ago
8 0

Answer: 14.0 moles of carbon.

Explanation: Using the Avogadro's number,

6.02 x 10^23 atoms -----> 1 mole of carbon .

8.43 x 10^24 atoms ----> 8.43 x 10^24/ 6.02 x 10^23 = 14.0moles of carbon.

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What is the radius of a hydrogen atom whose electron is bound by 0.544 ev? express your answer with the appropriate units?
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First, we need to calculate the principal quantum number n for this electron, using the equation:
E = (-13.60 eV) / (n x n)
where E is the energy that is used to bound the electron (here, E = - 0.544 eV).
- 0.544 eV = (-13.60 eV) / (n x n)
n x n = (- 13.60 eV) / (- 0.544 eV)
n x n = 25
n = 5

The orbital radius that is equal to the radius of a hydrogen atom is calculated using the equation:
r = 0.053 nm x n x n
r = 0.053 nm x 5 x 5
r = 0.053 nm x 25
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