Convert Molecules of H2O to Moles

To convert 4.72 x 10^19 molecules of H2O to moles, we use Avogadro's number, which is approximately 6.022 x 10^23 molecules per mole.

Step 1: Determine the conversion factor
1 mole H2O = 6.022 x 10^23 molecules H2O

Step 2: Set up the conversion
4.72 x 10^19 molecules H2O * (1 mole H2O / 6.022 x 10^23 molecules H2O)

Step 3: Calculate the result
4.72 x 10^19 / 6.022 x 10^23 = 0.784 x 10^-4 moles

Step 4: Determine the correct significant figures
The original number, 4.72 x 10^19, has three significant figures, so the final answer should also have three significant figures. Therefore, the result in scientific notation is 7.84 x 10^-5 moles of H2O.

For more practice and a better understanding of moles, grams, and other related concepts, you can check out the following resources:

[leprechaunlune]

Thank you so much for your simple, very easy-to- interpret breakdowns.

[PGANESH-id]

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