Question

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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Answer 1

Answer: 1.16 moles which contains
`7.00* 10^(23)` numbers of atoms.

Step-by-step explanation:

`1 mole=6.02* 10^((23))`

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

`\text{Number of atoms or molecules}=\text{number of moles}* 6.02* 10^(23) mole^(-1)`

So, if we have
`7.00* 10^(23)` atoms then the number of moles will be:

`7.00* 10^(23)=\text{number of moles}* 6.02* 10^((23)) mole^(-1)`

`\text{ number of moles}= (7.00* 10^(23))/(6.02* 10^((23)) mole^(-1))=1.1627moles \approx1.16 moles`

Hence, 1.16 moles which contains
`7.00* 10^(23)` numbers of atoms.