Math Equations Flashcards
1
Q
How do you calculate relative atomic mass?
A
(isotopic mass x % abundancy) / 100
2
Q
How do you calculate relative molecular mass?
A
This is the sum off all the atoms in the chemical formula.
-CO2 = 44
-12 + 16 + 16
3
Q
How do you convert from degrees to kelvin?
A
Add 273.
4
Q
What is the ideal gas equation?
A
pV = nRT
- p stands for pressure, kpa/pa
- v stands for volume, dm3/m3
- n stands for moles
- R is the molar gas constant, 8.314
- t stands for temperature,
5
Q
How do you calculate the % yield?
A
Actual yield (g)/ Theoretical yield (g) x 100
6
Q
How do you calculate the % atom economy?
A
Mass of desired product / total mass of reactants x 100
7
Q
How do you calculate % uncertainty?
A
uncertainty value / uncertainty reading x 100
