Substances X and Y are both nonpolar. If the volatility of X is higher than that of Y, what is the best explanation? A) X’s molecules experience stronger dipole-dipole forces than Y’s molecules.

B) Y’s molecules experience stronger dipole-dipole forces than X’s molecules.

C) X’s molecules experience stronger London dispersion forces than Y’s molecules.

D) Y’s molecules experience stronger London dispersion forces than X’s molecules.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

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