Answer:
formula units
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:

1 mole of
contains
of formula units
Thus 0.203 mole of
contains =
of formula units
Answer:
50km
Explanation:
70km - 20km = 50 kilometers
Avogadro’s number allows you to change moles to number of molecules/atoms.