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CHEM 1020 - Everyday Chemistry - Iordanova
Chapter 3
38
Chemistry
Undergraduate 1
08/23/2011

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Term
Chemical reactions
Definition
Bond-making and bond-breaking events that result in the rearrangement of atoms and the formation of new substances are called ______
Term
Reactants and are written on the left
Definition
For any chemical reaction, the starting materials are the ____ and are written on the ____
Term
Products
Definition
____ are formed during the reaction and are written on the right.
Term
Horizontal arrow
Definition
Reactants are separated from products by a ________ pointing from left to right.
Term
Combustion
Definition
____ means a reaction with 0(little2)
Term
Produces Carbon Dioxide and water when sufficient oxygen is present
Definition
Burning methant (CH(little4), or any other compound containing only hydrogen and carbon, produces ____ and ____ when sufficient ___ is present.
Term
The law of conservation of matter

Equal
Definition
The ______ states that matter can neither be created nor destroyed in a chemical reaction. Therefor, the number and kind of atoms on the left-hand side of an equation must be ___ to the number and kind of atoms on the right.
Term
changed
Definition
To balance a reaction, the chemical formula for a compound cannot be ______.
Term
molecules
Definition
To balance a reaction, the chemical formula for a compound cannot be changed. Only the number of ____ of that compound can be changed.
Term
The carbon cycle
Definition
The ____ is the series of events that allow nonliving materials and living organisms to recycle carbon.
Term
photosynthesis
Definition
One reaction of the carbon cycle is _____, in which water and carbon dioxide react to form sugar and oxygen.
Term
stoichiometry
Definition
The ____ of a chemical reaction is the relatioship between the number of molecules of the reactants and products in the balanced reaction equation.
Term
molecular mass
Definition
The ___ is the mass of one molecule of a compound.
Term
formula mass
Definition
The ____ is the mass of one unit of an ionic compound
Term
adding the masses
Definition
The molecular/formula mass is calculated by ______ of the atoms that make up the compound.
Term
chemical formula
Definition
When given only the structure of a molecule, the first step is to determine the _____ by adding up the number of each type of atom. The molecular mass can then be calculated by adding the masses of the atoms according to the formula.
Term
Mole
Definition
The ___ is the SI unit of measure to describe the amount of matter that is present.
Term
6.02 X 10 (23 power) (Avogadro's number)
Definition
One mole is equalt to _____
Term
grams
Definition
One mole of an element has a mass that is equal to the atomic mass of that element in _____
Term
12.01 g
Definition
One mole of an element has a mass that is equal to the atomic mass of that element in grams. For example, one mole of carbon has a mass of _____
Term
18.016 g
Definition
One mole of a compound has a mass that is equal to the molecular/formula mass of that compound in grams. For example, one mole of H(little 2)O has a mass of ______
Term
Molar mass
Definition
The _____ is the mass of one mole of a substance.
Term
balanced equation and the molar mass
Definition
The expected mass of a product or reactant can be calculated for any reaction by using the ______ and the ____
Term
grams
Definition
The units of molar mass are _____ per mole
Term
Mass
Definition
Moles X molar mass = ______
Term
Moles
Definition
Mass/molar mass = _____
Term
massive
Definition
Most biological molecules contain many atoms making them relatively ______
Term
Oxidation-reduction (redox)reactions
Definition
_____ involve the transfer of electrons from one substance to another.
Term
Organized substances lose electrons and reduced substances gain electrons
Definition
Orgainized substances ___ electrons and reduced substances ___ electrons
Term
Oxidation
Definition
_____ is loss of electrons
Term
Reduction
Definition
____ is gain of electrons
Term
reduced
Definition
If something is oxidized, something else must be _______
Term
Redox
Definition
In balancing _____ reactions, the same number of electrons must appear on both sides of the equation.
Term
battery
Definition
Combining a readily oxidized substance with an easily reduced substance can create a _____
Term
The oxidezed material is the anode and the reduced material is the cahode of the battery.
Definition
The oxidized material is the _____ and the reduced material is the ____ of a battery.
Term
Oxidation
Definition
____ can also be considered to be gain of oxygen atoms or loss of hydrogen atoms in a molecule.
Term
Reduction
Definition
____ can also be considered to be loss of oxygen or gain of hydrogen in a molecule.
Term
Respiration
Definition
_____ is a redox process in which living organisms oxidize food to release energy.
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