Why is it difficult to see colors outside at night?

question 3 options:

our eyes have rods and cones inside. the rods us see color, but they need more light to work.

our eyes have rods and cones inside. the cones us see color, but need more light to work.

at night, objects absorb light instead of reflect it, so the eyes are unable to see.

at night the light is black instead of white so the colors look different.

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:

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the answer is c i took the test