CHM 1025

Exam #4

Review Sheet

Chapter 7

Know how to define the following terms:

Avogadro's number

molar mass

empirical formula

mole

formula mass

molecular formula

percent composition

Be able to:

Calculate formula mass

Calculate percent composition of each element in a compound

Interconvert between particles (atoms, molecules, ions, or formula units), moles and grams

Calculate molar mass

Determine the moles of an element in a given amount of a compound that contains the element

Calculate empirical formulas from % composition, number of moles, or number of grams of each element in a compound

Calculate the molecular formula from the empirical formula of a compound

Chapters 8 and 9

Know how to define the following terms:

Actual yield

equation coefficient

chemical equation

law of conservation of mass

stoichiometry

limiting reactant

combustion reaction

percent yield

decomposition reaction

products

double-replacement reaction

reactants

single-replacement reaction

theoretical yield

synthesis (combination) reaction

Be able to:

Balance a chemical reaction

Classify a chemical reaction as combination, decomposition, single-replacement; double-replacement, or combustion

Convert between moles of one reactant or product and moles of another reactant or product

Carry out stoichiometry calculations

Carry out limiting reagent calculations

Calculate theoretical yields and percent yields.