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14-01-2021
Chemistry

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How many moles are in 6.21x1025 atoms of magnesium oxide?

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ihlester ihlester

24-01-2021

Answer: 55.56 moles of MgO

Explanation:

1 mole = avogadro number

if 6.21x10^25 atoms then molecules of MgO (equal numbers of Mg and O atoms)

= 0.5*6.21x10^25 = 3.105 molecules of MgO

So moles of MgO = 0.5*6.21*10^25/avogadro number = 55.56

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