Study Guide Stoichiometry Student Editable

Stoichiometry
Section 11.1 What is stoichiometry?
In your textbook, read about stoichiometry and the balanced equation.
For each statement below, write true or false.
_______true___________ 1. The study of the quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction is called stoichiometry.
________true__________ 2. Stoichiometry is based on the law of conservation of mass.
_________false_________ 3. In any chemical reaction, the mass of the products is less than the mass of the reactants.
________true__________ 4. The coefficients in a chemical equation represent not only the number of individual particles but also the number of moles of particles.
________true__________ 5. The mass of each reactant and product is related to its coefficient in the balanced chemical equation for the reaction by its molar mass.
Complete the table below, using information represented in the chemical equation for the combustion of methanol, an alcohol. methanol  oxygen → carbon dioxide  water
2CH3OH(l)  3O2 (g) → 2CO2(g)  4H2O(g)
Substance
Molar Mass (g/mol)
Number of Molecules
Number of
Moles (mol)

Mass (g) 6. Methanol
32.05
2
2
64.1 7. Oxygen gas
32.00
3
3
96 8. Carbon dioxide
44.01
2
2
88.02 9. Water
18.02
4
4
72.08 10. What are the reactants? _______methanol and oxygen gas__________________ 11. What are the products? _________carbon dioxide and water_____________________ 12. What is the total mass of the reactants? _____________160.1__________________________ 13. What is the total mass of the products? __________160.1_________________ 14. How do the total masses of the reactants and products compare?______________equal_________________
Section 11.1 continued
In your textbook, read about mole ratios.
Answer the questions about the following chemical reaction. sodium  iron(III) oxide → sodium oxide  iron
6Na(s)  Fe2O3(s) → 3Na2O(s)  2Fe(s) 15. What is a mole ratio?
A mole ratio is a ratio