Earths seasons in Northern Hemisphere: Choose ALL that apply. (Hey guys, sorry to bother but I have a headache and can't think of the answers. Please help..) Question 4 options:

More concentrated sunlight makes for cooler temperatures

The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.

The atmosphere absorbs some of the sun's rays

The tilt and revolution of the earth as it moves around the sun cause the different seasons of the year.

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:

po-215 i got it right on the quiz

l dont know l am s sorry