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In the world of chemistry, a 'mole' is a number of something... a very large number of something.

Just as a 'dozen' is 12 of something, a 'mole' is about 6.02 * 10^23 of something.

In chemistry, we like to measure the number of atoms or molecules in moles.

If one mole is equal to 6.02 * 10^23 atoms, and you have 7.00 * 10^23 atoms, then how many moles do you have?

Round your answer to two decimal places.

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Respuesta :

Answer: 1.16 moles which contains [tex]7.00\times 10^{23}[/tex] numbers of atoms.

Explanation:

[tex]1 mole=6.02\times 10^{(23)}[/tex]

This number represents the number of atoms or molecules in one mole of a compound or a substance.

[tex]\text{Number of atoms or molecules}=\text{number of moles}\times 6.02\times 10^{23} mole^{-1}[/tex]

So, if we have [tex]7.00\times 10^{23}[/tex] atoms then the number of moles will be:

[tex]7.00\times 10^{23}=\text{number of moles}\times 6.02\times 10^{(23)} mole^{-1}[/tex]

[tex]\text{ number of moles}= \frac{7.00\times 10^{23}}{6.02\times 10^{(23)} mole^{-1}}=1.1627moles \approx1.16 moles[/tex]

Hence, 1.16 moles which contains [tex]7.00\times 10^{23}[/tex] numbers of atoms.

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