SCH3U Worksheet Holy Mole-y Worksheet Identify the number of entities (N) present in 1 mole (n) of a substance. ___________________________ Write the equation that relates the number of entities (N) to the number of moles (n). 1. How many atoms of oxygen are present in each unit of Na2SO4? __________________ How many O atoms are present in 1 moles of Na2SO4? __________________ How many O atoms are present in 5 moles of Na2SO4? __________________ How many moles of O atoms are present in 1 mole of Na2SO4? __________________ How many moles of O atoms are present in 5 moles of Na2SO4? __________________ 2. How many atoms of hydrogen are present in each unit of CH3OH? __________________ How many H atoms are present in 1 mole of CH3OH? __________________ How many H atoms are present in 20 moles of CH3OH? __________________ How many moles of H atoms are present in 20 moles of CH3OH? __________________ How many moles of H atoms are present in 6.02 x 1023 molecules of CH3OH? __________________ How many moles of H atoms are present in 3.01 x 1023 molecules of CH3OH? __________________ How many moles of H atoms are present in 2.005 x 1023 molecules of CH3OH? 3. How many atoms of sulfur are present in each unit of Fe2(SO4)3? __________________ __________________ How many atoms of S atoms are present in 25 units of Fe2(SO4)3? __________________ How many moles of S atoms are present in 25 moles of Fe2(SO4)3? __________________ How many moles of S atoms are present in 2.4 x 1023 units of Fe2(SO4)3? How many S atoms are present in 5.5 moles of Fe2(SO4)3? __________________ __________________ 4. How many atoms in total are there in 1 molecule of carbon dioxide, CO2? __________________ How many molecules are there in 3.5 moles of carbon dioxide? __________________ How many atoms in total are there in 3.5 moles of carbon dioxide? __________________