Name ______________________________ Date _________________
Make the following mole conversions
1. Determine the number of atoms of zinc in 2.50 moles Zn
2. Calculate the number of molecules in 11.5 moles of H2O
3. How many moles are in 5.75 x 1024 atoms of Al
4. Determine the mass of 3.57 moles P2O5
5. Determine the number of grams in 1.25 moles of C6H12O6
6. What is the mass of 3.25 moles of hydrogen sulfate?
7. How many liters are in 4.5 moles of H2?
8. How many moles are in 2.2 L of O2?
9. How many grams are in 24.3 L of N2?
10. What is the density of N2? Remember that D=M/V
11. How many liters of He have a mass of 1.5 g?
12. What is the density of He? Remember that D=M/V
Define Empirical Formula
13. Analysis of a compound composed of iron and oxygen yields 174.86 g Fe
and 75.14 g O.
Calculate the moles of iron in the compound:
Calculate the moles of oxygen in the compound:
Calculate the simplest whole number mole ratio of iron to oxygen:
Empirical Formula: Fe__O__
14.An oxide of aluminum contains 0.545 g Al and 0.485 g O.
Calculate the moles of aluminum in the compound:
Calculate the moles of oxygen in the compound:
Calculate the simplest whole number mole ratio of aluminum to oxygen:
Empirical Formula: Al__O__
15. A compound contains 35.98% aluminum and 64.02% sulfur.
Calculate the moles of aluminum in the compound:
Calculate the moles of sulfur in the compound:
Calculate the simplest whole number mole ration of aluminum to sulfur:
Empirical Formula: Al__S__
Show all work:
1. Convert 7.64 g H2SO4 to moles
2. How many grams would 47.0 moles of KMnO4 be?
3. Convert 8.30 mole of O2 to liters
4. Convert 90.0 g of CO2 to liters
5. Convert 44.8 L N2 to particles
6. How many atoms would 5.72 x 1023 particles of NH3 be? THINK on this
one. One particle is NH3
7. Convert 125.0 g of Cl2 to particles of chlorine
8. How many grams would 8.10 x 1028 particles KOH be?
9.
Convert 3.75 x 1021 particles MgCl2 to moles
10. The following data was obtained in lab:
Mass of copper
2.25g
Mass of copper sulfide
2.81g
Calculate the empirical formula for copper sulfide (show all work clearly!)
11. The following data was obtained in lab:
Mass of magnesium
2.40g
Mass of magnesium oxide 3.98g
Calculate the empirical formula for magnesium oxide (show all work clearly!):