How many atoms are there in 6.35 moles of ccl4?

Answer 1

There are 6.022 x 10²³ (Avogadro's Number) of anything in a mole of that thing. So there are 6.022 x 10²³ puppies in a mole of puppies, or 6.022 x 10²³ marbles in a mole of marbles, or 6.022 x 10²³ molecules in a mole of carbon tetrachloride. HOWEVER, each molecule of CCl₄ has 5 atoms in it - one carbon atom and 4 chlorine atoms. So to figure out the number of atoms in 6.35 moles of CCl₄:

(6.35 moles CCl₄)(6.022 x 10²³ molecules CCl₄/mole CCl₄)(5 atoms/molecule CCl₄) = 1.91 x 10²⁵ atoms