Mole Sample Problems
Name ___________________________________________
Honors Chemistry
Period _______
1.
How many grams in 3.0 moles of water?
2. How many moles in 60.0 g of copper?
3. How many atoms in 3.0 moles of copper?
4. How many atoms in 3.00 moles of water?
5. How many atoms in 100.0 g of copper?
6. How many oxygen atoms are in 75.0 g of sucrose, C12H22O11?
7. Which of the following samples of gases occupies the largest volume, assuming that each sample is the
same temp and pressure?
50.0 g Ne
50.0 g Ar
50.0 g Xe
8. Calculate the volume of a gas balloon filled with 1.00 mole of helium when the pressure is 760. torr and
the temperature is 0.oC.
9. Calculate the pressure, in atm, exerted by 54.0 g of xenon in a 1.00-L flask at 20.oC.
10. Calculate the density of nitrogen dioxide, in g/L, at 1.24 atm and 50.oC.
11. Determine the empirical formula of a compound if a 2.500-g sample contains 0.900 g of calcium and
1.600 g of chlorine.
12. Determine the empirical formula for an iron oxide that is 78% iron. Name the compound.
13. Find the molecular formula of a compound that contains 42.5 g of palladium and 0.80 g of hydrogen.
The molar mass of the compound is 216.8 g/mol.
14. Prepare 500. mL of 1.0 M NaCl
15. Calculate the molarity if 37 g of NaCl are dissolved in 150 mL of solution.
16. How many moles of HCl are present in 145 mL of a 2.25 M HCl solution?
17. How many grams of NaCl are contained in 2.5 L of a 1.5 M solution?
18. Calculate the molarity of a solution that contains 8.50 g of calcium nitrate in 2.0 L.
19. Calculate the molality of a solution that contains 8.50 g of calcium nitrate in 125 g H2O.