Question

You have 34.1 x 1023 molecules of O2. How many moles of O2 do you have? Fill in the grid. Then, solve the problem and answer the question. Remember to include units!

Answer 1

Number of moles = 5.7 moles of oxygen.

Explanation:

We have to convert number of molecules into number of moles by dividing the number of molecules by Avogadro's number.

Here number of molecules of oxygen given is 34.1 × 10²³ molecules.

Now we have to divide the number of molecules by Avogadro's number as,

Number of moles = $\frac{number of molecules}{Avogadro's number}$

                            = $\frac{34.1}{6.022} \times \frac{10^{23} }{10^{23} }$

                          = 5.7 moles

So here molecules is converted into moles.