Which statements are true about the house of card on the table? Choose all that apply. a. The force of gravity is acting on the cards and the table.
b. the forces acting on the house of cards and the table are balanced.
c. the forces acting on the house of cards and the table are balanced.
d. the house of cards is not stable because too many forces are acting on it.
e. the house of cards is stable because there are no forces acting on on it and the forces are not changing.
f. The house of cards is stable because there are no forces acting on any of the cards.

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:

a) the particles of the chair are strongly held together.