Chemistry

The density of iron at 25 C is 7.871 g/cm^3

what is the volume of one mole of solid iron at 25 C?

i understand that volume = m/d but how would i go about solving this?

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asked by Matt
  1. Isn't one mole of iron equal to its atomic mass in grams? Can you look up the atomic mass of iron?

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    posted by bobpursley
  2. thanks, this is how i calculated it:

    1 mol Fe/.141 mol/cm^3 = 7.10 cm^3

    (the .141 came from converting the density in to moles)

    is that correct?

    then the next step in the problem is to find the volume of 1 mol of Fe atoms assuming each atom to be spherical. the atomic radius is 0.126 nm.

    so i calculated:
    4/3 pi (0.126 nm)^3 = .00838 nm^3

    is that correct?
    thank you for your help.

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    posted by Matt

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