Which chemical equation represents the reaction of an arrhenius acid and an arrhenius base?
(1) hc2h3o2(aq) + naoh(aq) --> nac2h3o2(aq) + h2o(l)
(2) c3h8(g) + 5 o2(> 3 co2(g) + 4 h2o(l)
(3) zn(s) + 2 hcl(> zncl2(aq) + h2(g)
(4) bacl2(aq) + na2so4(aq) --> baso4(s) + 2 nacl(aq)

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: