Module 4 - Stoichiometry Flashcards
An area of chemistry that examines the quantitative relationship between
reactants and products in chemical processes.
Stoichiometry
The average number of protons and neutrons for all natural isotopes of an element.
Atomic mass
What is the value of Avogadro’s number?
0.622 x 10^23
Refers to the mass of a substance.
Moles
It is a convenient way to express composition for any sample size wherein the mass of each component is converted to a percentage of the total mass of the sample.
Percent composition
A process in which a substance or substances are changed into one or more new substances.
Chemical reaction
Reactants (starting substances) are placed on the _____ side.
Left
Products (substances produced) are placed on the _____ side.
Right
Steps in balancing chemical equations
a. Identify the reactants and products and write their correct formulas.
b. Write down your given equation.
c. Write down the number of atoms per element that you have on each side of the equation.
d. Always leave hydrogen and oxygen for last.
e. Select the element that appears in only a single molecule of reactants and only a single molecule of products.
f. Add coefficient/s to the atom on the right of the equation to balance it with the atoms on the left of the equation
A type of chemical reaction wherein a reactant breaks down into two or more products.
Decomposition reaction
A type of chemical reaction wherein two or more reactants form a single product.
Synthesis reaction
A type of chemical reaction wherein one element replaces another in a compound.
Single displacement reaction
A type of chemical reaction wherein two ionic compounds exchange ions.
Double displacement
A type of chemical reaction wherein a hydrocarbon (a compound containing carbon and hydrogen) reacts with oxygen to form carbon dioxide and water
Combustion reaction
The mass in grams of one mole of an atom, a molecule, or a compound.
Molar mass
