Chapter 3 Flashcards
1
Q
Tell the number of atoms of each element in a molecule
A
Subscripts
2
Q
Tell the number of molecules
A
Coefficients
3
Q
Two or more substances react to form one product
A
Combination reactions
4
Q
One substance breaks down into two or more substances
A
Decomposition reaction
5
Q
Reaction which often involves hydrocarbons reacting with oxygen in the air
A
Combustion reactions
6
Q
Sum of the atomic weights for the atoms in a chemical formula
A
Formula weight
7
Q
The sum of the atomic weights of the atoms in a molecule
A
Molecular weight
8
Q
Percent composition formula
A
%element =(# of atoms)(atomic weight)*100
(FW of the compound)
9
Q
Avogadro’s Number
A
6.02*10^23
10
Q
Mass of 1 mol of a substance
A
Molar mass
