Topic 3 - Quantitative Chemistry Flashcards
1
Q
What is the conservation of mass?
A
During chemical reactions, no mass is destroyed or created.
2
Q
What is the limiting reactant?
A
The reactant that is used up
3
Q
How do you calculate %mass of an element in a compound?
A
precentage mass =( Atomic mass x number of atoms of that element / Mr of compound) x 100
4
Q
What is avogadros constant
A
6.02x10^23
5
Q
What is the equation for moles/
A
mass/mr
6
Q
How do you find the volume of a gas
dm^3
A
volume of gas = mass/mr x 24
7
Q
How do you find the atom economy?
A
atom economy = (RFM of desired products/RFM of all reactants)
8
Q
How do you find percentage yield?
A
percentage yield = (mass of product made/maximum theoretical mass of product) x 100
9
Q
Well done Lucas
A
Please do a good job.
