24 5.1 The Mole and Avogadro’s Number

Practice questions

Short-answer questions

1. 1. 1. Determine the number of particles for the following number of moles. Round to 2 decimal places.
         1. 1 mol= ________________ particles
         2. 2 mol= ________________ particles
         3. 5 mol= ________________ particles
         4. 0.5 mol= ________________ particles
         5. 0.1 mol= ________________ particles
      2. Determine the number of moles for the following number of particles.
         1. 6.02×1023 = _______ mol
         2. 1.204×1023 = _______ mol
         3. 1.4448×1025 = _______ mol
         4. 2.2274×1023 = _______ mol
         5. 1.6555×1024 = _______ mol

   Solutions

   1. 1. 1. 1. 1 mol= 6.02 × 1023 particles
            2. 2 mol= 1.20 × 1024 particles
            3. 5 mol= 3.01 × 1024 particles
            4. 0.5 mol= 3.01 × 1023 particles
            5. 0.1 mol= 3.02 × 1022 particles
         2. 1. 6.02×1023 = 1 mol
            2. 1.204×1023 = 0.2 mol
            3. 1.4448×1025 = 24 mol
            4. 2.2274×1023 = 0.37 mol
            5. 1.6555×1024 = 2.75 mol