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How many moles of iron are present in 3.15 x 1023 atoms of iron?
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How many moles of iron are present in 3.15 x 1023 atoms of iron?

User Rotem B
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One mole is about 6.022*10^23 atoms hence 3.15/6.022 makes 0.523 moles of iron
User Gawry
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