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Posted by on Wednesday, May 15, 2013 at 10:38am.

the mass of the oxygen (o2) in a room is 0.0568 grams. How many oxygen molecules are in the room. 2 conversions are needed.

  • chem - , Wednesday, May 15, 2013 at 1:18pm

    mols O2 = grams/molar mass
    # molecules = mols O2 x 6.02E23 or if you want to do conversions; do it this way.

    0.0568g O2 x (1 mol O2/32 g O2) x (6.02E23 molecules/1 mol O2) = ? molecules O2.

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