Calculations Flashcards
1
Q
What is a mole?
A
The amount of substance in grams that has the same number of particles as there are atoms in 12 grams of carbon-12
2
Q
What is the relative atomic mass?
A
The average mass of 1 atom compared to 1/12 of the mass of 1 atom of carbon-12
3
Q
What is the relative molecular mass?
A
The average mass of a molecule compared to 1/12 of the mass of 1 atom of carbon 12
4
Q
What is the equation to find moles for pure solids, liquids and gases?
A
Moles = mass/Mr
Mass: grams
5
Q
What is the equation to find moles for gases?
A
PV = nRT P = pressure: Pa V = volume: m^3 T = temperature: K n = moles R = 8.31
6
Q
What is the equation to find moles for solutions?
A
Concentration = moles/ volume
Concentration: mol/dm^3
Volume: dm^3
7
Q
Measurement conversion?
A
1,000 Cm^3 —> 1 dm^3
1,000,000 mm^3 —> 1 dm^3
1,000 dm^3 —> 1 m^3
