Molar mass CCl₄ = 12 + 35.5 x 4 = 154 g/mol
number of moles:
74.41 / 154 => 0.48318 moles
1 mole ------------------- 6.02 x 10²³ molecules
0.48318 moles ----------- ?
molecules = 0.48318 x ( 6.02x10²³) / 1
molecules = 2.908 x 10²³ / 1
= 2.908 x 10²³ molecules
hope this helps!
