The Nature of Substances and Chemical Reactions Flashcards
1
Q
What is an element
A
Substance made of a single type of atom
2
Q
What is a compound
A
A substance made from two or more elements that are chemically bonded
3
Q
Percentage yield
A
(Actual/theoretical)*100
4
Q
Percentage composition
A
(Mass/total mass)*100
5
Q
Mixture separating techniques
A
Filtration, evaporation, chromatography, distillation
6
Q
Rf value (Chromatography)
A
Distance moved by substance/distance moved by solvent
7
Q
Empirical formula
A
Simplifying
8
Q
Avogadro constant
A
6.02*10^23
9
Q
Mass
A
Mr moles
