Determine the density of sulfur dioxide gas (SO2)?

The mass of 1 mole of anything can be determined from its molecular formula. In the case of SO2 it would be 64g/mol. The volume of any gas at STP is 22.4L/mol. To determine the density, you divide the mass by the volume (64g/mol / 22.4L/mol).

Explanation:

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:

answer; i believe that the correct answer is (a) potassium(k)