# Physics problem: to do with Avogadro's number and moles?

The molar mass of silver is 108 g/mol. What is the mass in kilograms of the 2.3×1024 atoms of silver that make up the chalice?

Answer in kg

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- 1 decade agoBest Answer
You know there are 2.3x10^24 atoms. Dividing this by Avogadro's number (6.022x10^23 atoms/mole) gives you the number of moles of silver that you have. You can multiply that number by 108 grams/mole to get the number of grams of silver, then divide that by 1000 to convert to grams into kilograms.

Source(s): Many, many chemistry classes!

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