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7.66 X 10^5 millimols argon (1 moleargon/1000mmol)(

**6.022**X 10^23/1 mole Ar) = 4.61 X 10^25atomsof

Subsequently, one may also ask, how many moles of argon are in atoms?

The SI base unit for amount of substance isthe**mole**. 1 **mole** is equal to 1 **moles Argon**,or39.948 grams. Note that rounding errors **may** occur, soalwayscheck the results.

**mole**= 6.022×1023 6.022 × 1023

**atoms**, molecules, protons, etc. To convert from

**moles**to

**atoms**, multiply the molar amount byAvogadro's number. Toconvert from

**atoms**to

**moles**,divide the

**atom**amount by Avogadro's number (or multiply byitsreciprocal).

Just so, how many atoms of argon do we have?

Name | Argon |
---|---|

Atomic Mass | 39.948 atomic mass units |

Number of Protons | 18 |

Number of Neutrons | 22 |

Number of Electrons | 18 |

To **calculate the number of atoms** in asample,divide its weight in grams by the amu atomic mass from theperiodictable, then multiply the result by Avogadro's**number**: 6.02 x10^23.