Complete the following sentences by filling in the appropriate word or phrase from the list below. Each word or phase may be used once, more than once, or not at all.
reactants actual coefficients
molar ratio particles subscripts
quantitative conservation of matter mass
1. Stoichiometry is the study of the ______________ relationships that exist in chemical reactions.
2. Stoichiometry can be used to determine how much product will form from a given amount of ______________.
3. The ______________ in a balanced equation indicate(s) the number of particles of each substance taking place in the reaction.
4. It is possible to interpret the coefficients in a balanced chemical equation as either the number of moles or the number of ______________ involved in the reaction.
5. The coefficients in an equation do not show the ______________ number of moles, only the relative number involved.
6. You must determine the ______________ in a balanced equation before solving any stoichiometry problem.
7. A balanced equation verifies the law of ______________.
True, False
8. The term stoichiometry is derived from the Greek words
stoicheion, meaning element, and metron, meaning measure. ____________
9. You can determine the number of moles of any substance
produced in a reaction if you know the number of moles of at
least one of the reactants. ___________
10. The molar ratio of hydrogen to oxygen in the equation
2H2 + O2 yields 2H2O is 1:2 . __________
11. The total mass of the reactants is equal to the total mass of the
products in a chemical reaction. __________
12. It is possible to change grams of an element directly into atoms by not including the mole step in the solution. _________
Show all work for solutions to the following problems:
acid? The equation for this reaction is Mg + 2HCl yields MgCl2 + H2.
14. Aluminum reacts with HCl to produce aluminum chloride (AlCl3) and hydrogen
gas.Write a balanced equation for the reaction and calculate the number of moles
of HCl required to react with 0.87 mol of Al.
15. Glucose (C6H12O6) combines with O2 in the body to produce carbon dioxide and
water. Write a balanced equation for this reaction. How many moles of O2 are
required to combine with 0.25 mole of glucose? How many moles of CO2 and
H2O would be produced in this reaction?
16. Calcium carbonate (CaCO3) combines with HCl to produce calcium chloride
(CaCl2), water, and carbon dioxide gas. write a balaced equation for this reaction.
How many moles of HCl are required to react with 2.5 mol of CaCO3? How many
moles of CO2 would be produced?
17. Zinc reacts with H2SO4 to yield ZnSO4 and hydrogen gas. How many moles of
hydrogen will be produced if 0.36 mol of zinc react with an equal amount of
H2SO4?