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Date Pd
Honors Chemistry – Unit 6 Worksheet 3
Mass to Mole to Particles Calculations
Show all of your work. Be careful with units and significant digits.
1. An old (pre-1987) penny is nearly pure copper. If such a penny has a mass of 3.125 g, how
many moles of copper atoms would be in one penny?
2. Four iron nails have a total mass of 6.35 grams. How many moles of iron atoms do they
contain?
3. A raindrop has a mass of 0.050 g. How many moles of water does a raindrop contain?
4. What mass of water would you need to have 20.0 moles of H2O?
5. One box of Morton’s Salt contains 750.0 grams. How many moles of sodium chloride is this?
6. A chocolate chip cookie recipe calls for 0.050 moles of baking soda (sodium bicarbonate). How
many grams should the chef mass out?
7. Rust is iron(III) oxide, Fe2O3. The owner of a l959 Cadillac convertible wants to restore it by
removing the rust with oxalic acid, but he needs to know how many moles of rust will be
involved in the reaction. How many moles of iron(III) oxide are contained in 1.75 kg of rust?
