1.2 Amount of substance Flashcards
1
Q
How do you work out number of moles from the mass and Mr?
A
Moles=mass/Mr
2
Q
How do you work out the number of moles from the concentration and volume?
A
Moles=mass x concentration
3
Q
What is the ideal gas equation?
A
pV=nRT
4
Q
How do you convert °C to K?
A
+273
5
Q
How many molecules is there in one mole of methane?
A
6.02x1023 (Avogadro’s constant)
6
Q
How do you write an ionic equation?
A
Only show the ions which are reacting and change at the end. E.g 2H+ and O2- to H2O
7
Q
How do you work out atom economy?
A
(Molecular mass of desired product/sum of molecular masses of all products) x100
