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What number of Fe atoms and what amount (moles) of Fe atoms are in 550.0 g of iron?

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shouldn't it be 5.9e24?

it keeps telling me i have the wrong sig figs...

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  1. 550.0 has 4 sig ifigs

    550.0 g Fe @ 6.022 e23 atoms / 55.845 grams = 5.9426e24

    your answer (4 sigfigs): 5.943e24  

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