Acids generally have an excess of ions in solution, while bases usually have an excess of ions in solution.
h3o+ ions; oh− ions
oh− ions; h3o+ ions
both h3o+ and oh−; only oh−
only h3o+ ; both h3o+ and oh−

The answer to your question is:

Explanation:

Acids generally have an excess of _H₃O⁺ ions in solution, while bases usually have an excess of __OH⁻ ions in solution.

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:

d.) circle motion requires a force to give it a centripetal acceleration.