The continents may not have drifted slowly into their present positions. true false

FALSE

Explanation:

According to the continental drift theory, the continents moved from one place to another with respect to the poles. Although many pieces of evidence had been contributed by Mr. Alfred Wegener, the main mechanism behind this was not able to explain.

Later on, this theory modified into a new one, commonly known as the plate tectonic theory that explains that the continents move over the layer of the asthenosphere due to the formation of convection current in the mantle. This is possible because of the heat radiated from the interior of the earth.

Thus, it was concluded that initially the earth was comprised of a single super-continent named 'Pangea', which got split into Laurasia and Gondwanaland due to the plate tectonic movement. This process further continued at a much slower rate which resulted in the present-day location of the continents.

Thus, the above-given statement is False.

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:

sorry idk the answer well to you i have a explaination

explanation: a formula which shows the arrangement of atoms in the molecule of a compound