Module 5: Counting Molecules & Atoms in Chemical Equations

Reaction that changes a compound

into its constituent elements (134)

Decomposition reaction

Reaction that

starts with two or more elements

and produces one compound (137)

Formation reaction
Reaction in which O2 is added to a compound containing carbon and hydrogen, producing CO2 and H2O (138)
Complete combustion reaction

Reaction in which O2 is added

to a compound containing

carbon and hydrogen,

producing either CO or C,

along with H2O  (140)

Incomplete combustion reaction

Device on an automobile that

converts gaseous carbon monoxide produced by the engine

into gaseous carbon dioxide (141)

Catalytic converter

Number on the periodic chart

that is below an element’s symbol.;

It represents

the average mass of the atom’s isotopes

in atomic mass units.  (142)

Atomic mass

Number on the periodic chart

above an element’s symbol.;

It represents the number of protons

in the nucleus of the atom.; (142)

Atomic number

Mass unit used on the periodic chart.

1.00amu = 1.66 X 10-24 g

(143)

Atomic mass unit
Mass of a single molecule. (144)
Molecular mass

A group of atoms or molecules that number 6.02 X 1023

(145)

Mole
x

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