How many moles are in 9.20x10^20 molecules of water (H2O)?
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1.53 * 10^-3 moles of H20

Explanation:

I see that you're using the factor-label method, so if you want to convert a number into another number, let's start with the first number.

We have 9.20 * 10^20 molecules of water.

6.02 * 10^23 particles or molecules of water is 1 mole

If we want moles, we can write it like this

9.20 * 10^20 molecules of H20 | 1 mole of H20                            

                                                    | 6.02 * 10^23 molecules of H20

= 1.53 * 10^-3 moles of H20

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