amount of substance Flashcards
(10 cards)
1
Q
What is the equation for moles using mass?
A
Moles = Mass / Mr
2
Q
What is the ideal gas equation?
A
PV = nRT
3
Q
Units in PV = nRT?
A
Pressure = Pa, Volume = m³, n = mol, R = 8.31 Jmol⁻¹K⁻¹, Temperature = K
4
Q
What is Avogadro’s constant?
A
6.022 x 10^23 mol⁻¹. Number of particles in one mole.
5
Q
What is molar gas volume at RTP?
A
24.0 dm³/mol at 298K and 100 kPa.
6
Q
Concentration formula?
A
Concentration = Moles / Volume (dm³)
7
Q
Define empirical formula.
A
Simplest whole-number ratio of atoms of each element in a compound.
8
Q
Define molecular formula.
A
Actual number of atoms of each element in a molecule.
9
Q
What is percentage yield?
A
(Actual yield / Theoretical yield) × 100
10
Q
What is atom economy?
A
(Mr of desired product / Total Mr of all products) × 100
