Avogardo Constant

Calculations involving the mole:

N = n * N

N = number of particles n = number of moles N = Avogardo’s constant Mole = Words used for multiples Ex. How many atoms are in 3.67 mol of Cl?

N = n * N

N = 3.67 mol * 6.022 * 10 particles / mol

= 2.210074 * 10 atoms

= 2.21 * 10 atoms (Rounded this number to Significant Digits)

Ex. How many moles in 9.87 * 10 atoms of H

n = N/N

n = (9.87 * 10 atoms) / (6.022 * 10 atoms / mol) = 1.64 * 10 mol (correct Significant Digits)

Homework (Grade 11 Chemistry) P.218 - 221 odd #‘s P.226 # 1 - 7 P.228 # 1 - 10** P.230 # 1 - 20**

Ayush Garg