Stoichiometry Unit 7 Worksheet 1 Date__________Name ______________________________
Show all work needed on a separate sheet of paper.
Part 1:
1. How many grams of magnesium are required to react with 0.350 mol hydrochloric acid?
Mg + 2HCl
MgCl2 + H2
2. How many moles of calcium nitrate would be produced from 0.877mol nitric acid?
Ca3(PO4)2 + 6HNO3
3Ca(NO3)2 + 2H3PO4
Part 2:
3. Determine the mass of calcium hydroxide produced when calcium carbide reacts with 0.695g of water.
CaC2 + 2H2O
Ca(OH)2 + C2H2
4. What mass of hydrogen peroxide (H2O2) must decompose to produce 0.241g of water?
2H2O2
2H2O + O2
Part 3:
5. How many mols of ozone must decompose to produce 0.870L of oxygen?
2O3
3O2
6. 2.66L of carbon dioxide will form at STP from what mass of benzene in a combustion reaction?
2C6H6 + 15O2
6H2O + 12CO2
Part 4:
7. What volume of hydrogen sulfide (H2S) is necessary to react with 17.4 mL of oxygen gas?
2H2S + 3O2
2SO2 + 2H2O
8. What volume of nitrogen should be produced with 5.8L of carbon monoxide (CO)?
2C7H5(NO2)3
2C + 12CO + 5H2 + 3N2
Part 5:
9. If 2.63L of oxygen are consumed in the combustion of acetylene (C2H2), how many molecules of carbon
dioxide should be produced?
2C2H2 + 5O2
2H2O + 4CO2
10. Find the mass of aluminum required to produce 4.72x1023 formula units of aluminum sulfate.
2Al + 3H2SO4
Al2(SO4)3 + 3H2
Part 6:
Nitrogen (N2) (round) and hydrogen (H2) (square) react to form ammonia (NH3). Consider the mixture of
nitrogen and hydrogen in the picture below. Draw another picture to represent the product mixture, assuming
the reaction goes to completion. How did you arrive at your pictorial representation? N2 + 3H2
2NH3