CHEM 108 Exam 2 – Study Guide, Practice Questions & Chemistry Exam Review
Avogadro’s Number - correct answer ✔✔(6.022 x 10^23) is the number of particles in one mole
of a pure substance.
How to calculate molar mass - correct answer ✔✔Ex: C12H22O11
(12x12)+(22x1)+(11x16)
Mass x concentration
Take the subscript of the element multiplied by the atomic mass
Converting between grams and moles - correct answer ✔✔
Writing balanced equations - correct answer ✔✔1. Make sure no atoms are lost or gained
2. The number of atoms on the reactant side are equal to the amount on the product side.
Balanced equations - correct answer ✔✔a chemical equation in which mass is conserved; each
side of the equation has the same number of atoms of each element
Types of Chemical Reactions: - correct answer ✔✔1) Combination reaction
2) Decomposition reaction
3) Displacement reaction - single or double
4) Combustion
Combination Reaction - correct answer ✔✔1. Two or more elements form one product
2. Simple compounds combine to form one product
, Decomposition Reaction - correct answer ✔✔1. one substance splits into two or more simpler
substances
single replacement reaction - correct answer ✔✔1. one element takes the place of a different
element in another reacting compound
Double replacement reaction - correct answer ✔✔1. Positive ions in the reactant compounds
switch places
Combustion Reaction - correct answer ✔✔1. a carbon-containing compound burns in oxygen
gas to form carbon dioxide (CO2) and water (H20)
2. energy is released as a product in the form of heat.
Oxidation - correct answer ✔✔loss of electrons
Reduction - correct answer ✔✔gain of electrons
Mole-mole factor - correct answer ✔✔a ratio of the moles for any two substances in an
equation
Use a mole-mole factor from a balanced equation to calculate the number of moles of another
substance in the reaction. - correct answer ✔✔
Given the mass in grams of a substance in a reaction, calculate the mass in grams of another
substance in the reaction - correct answer ✔✔sdsiadauasdiadasdisiuashisu
Describe exothermic and endothermic reactions and factors that affect the rate of a reaction -
correct answer ✔✔
Avogadro’s Number - correct answer ✔✔(6.022 x 10^23) is the number of particles in one mole
of a pure substance.
How to calculate molar mass - correct answer ✔✔Ex: C12H22O11
(12x12)+(22x1)+(11x16)
Mass x concentration
Take the subscript of the element multiplied by the atomic mass
Converting between grams and moles - correct answer ✔✔
Writing balanced equations - correct answer ✔✔1. Make sure no atoms are lost or gained
2. The number of atoms on the reactant side are equal to the amount on the product side.
Balanced equations - correct answer ✔✔a chemical equation in which mass is conserved; each
side of the equation has the same number of atoms of each element
Types of Chemical Reactions: - correct answer ✔✔1) Combination reaction
2) Decomposition reaction
3) Displacement reaction - single or double
4) Combustion
Combination Reaction - correct answer ✔✔1. Two or more elements form one product
2. Simple compounds combine to form one product
, Decomposition Reaction - correct answer ✔✔1. one substance splits into two or more simpler
substances
single replacement reaction - correct answer ✔✔1. one element takes the place of a different
element in another reacting compound
Double replacement reaction - correct answer ✔✔1. Positive ions in the reactant compounds
switch places
Combustion Reaction - correct answer ✔✔1. a carbon-containing compound burns in oxygen
gas to form carbon dioxide (CO2) and water (H20)
2. energy is released as a product in the form of heat.
Oxidation - correct answer ✔✔loss of electrons
Reduction - correct answer ✔✔gain of electrons
Mole-mole factor - correct answer ✔✔a ratio of the moles for any two substances in an
equation
Use a mole-mole factor from a balanced equation to calculate the number of moles of another
substance in the reaction. - correct answer ✔✔
Given the mass in grams of a substance in a reaction, calculate the mass in grams of another
substance in the reaction - correct answer ✔✔sdsiadauasdiadasdisiuashisu
Describe exothermic and endothermic reactions and factors that affect the rate of a reaction -
correct answer ✔✔
