Measuring Chemical Reactions Flashcards
1
Q
Atomic Mass
A
The mass of one atom of 12C =12 amu
SINGLE atom of a SINLE ISOTOPE
amu
2
Q
1amu =
A
1.66054 X 10^-24g
3
Q
Mass Defect
A
Energy lost/less mass
Parts don’t equal weight of whole
4
Q
Greater mass defect = _____ stable isotope
A
More
5
Q
Average Atomic Mass
A
Average mass of a COLLECTION OF ISOTOPES
(Convert percent into decimal)
AAM = f1M1 +f2M2…
(f1 being percent abundance
M1 being Atomic mass)
6
Q
Calculating Average Atomic Mass
A
AAM = (fractional abundance)(Atomic mass) + (fa)(am)
7
Q
Atoms have _____ masses
A
Atomic
8
Q
Compounds have _____ masses
A
Formula
9
Q
Formula Mass
A
Sum of average Atomic masses of elements in a COMPOUND
amu
10
Q
Percent Composition
A
% element = (atoms of element)(atomic weight)/(formula weight) X100
11
Q
Molecular Mass
A
Formula mass applied to COVALENT COMPOUNDS
