What do you have to do for relative formula mass ?
Add atomic masses
What is the relative formula mass of Al2(SO4)3 ?
342
What is the definition of empirical formula ?
Simplest ratio of atoms.
What is the first and second step in finding the empirical formula ?
Divide mass by atomic masses.
Divide each by the smallest number.
What is the conservation of mass ?
The mass you put into a reaction will be the same as the mass you put out.
What are the 3 steps in finding the maximum mass ?
- Work out relative formula mass
- Product over reactant rfm
- Times the mass in the question
What is the triangle for concentration ?
Mass
concentration volume
How do you convert cm cubed to dm cubed ?
Divide by 1000
What is the triangle for moles ?
mass
moles Mr
How much is one mole ?
6.02 times 10 to the power of 23 (Avogrado’s constant )
How do you calculate the particles using moles ?
Moles time 6.02 times 0 to the power of 23.
What are the steps in finding the limiting reactant ?
- Calculate RFM
- Work out moles
- Find the smallest number
What do you work out with stoichiometry ?
masses of reactants to balance equation
What are the 3 steps for stoichiometry ?
- Calculate RFM
- Work out moles
- Divide mole by smallest mole and add to equation.
