Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain. Calculate the mass in grams of 3.65 × 1020 molecules of SO3.

The mass of sulfur trixoide is 0.0485 g

Explanation:

We are given:

Molecules of sulfur trixoide =

According to mole concept:

number of molecules are present in 1 mole of a compound

So, number of molecules will be present in =

To calculate the number of moles, we use the equation:

Moles of sulfur trixoide =

Molar mass of sulfur trioxide = 80 g/mol

Putting values in above equation, we get:

Hence, the mass of sulfur trixoide is 0.0485 g

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: