Unit 2 b Flashcards
1
Q
Equation for number of moles
A
n = m / M moles = mass / molar mass
2
Q
Why do we balance chemical equations?
A
So that no atoms are created or destroyed in the reaction
3
Q
Relative formula mass
A
The mass in atomic mass units of one formula of a substance
4
Q
Empirical formula
A
The simplest whole-number ratio of atoms in a compound
5
Q
Definition of “isotope”
A
Atoms with the same number of protons but different number of neutrons
6
Q
Equation for Percentage Yield
A
Experimental mass / Theoretical mass x 100%
7
Q
Description of the structure of ionic compounds
A
A lattice of alternating positive and negative ions
8
Q
Description of the structure in covalent compounds
A
Simple molecules containing a small number of bonded atoms
