chemistry equations Flashcards
1
Q
relative formula mass
A
the sum of the mass number of every atom in the molecule
2
Q
moles
A
one mole of a substance will have the same mass in grams as the relative atomic mass of that substance
3
Q
moles, mass, and relative formula mass
A
moles = mass / relative formula mass
4
Q
Percentage yield
A
percentage yield =
(actual yield / theoretical yield) x 100
5
Q
empirical formula
A
find the moles using the equation
moles = mass / Mr.
divide each of the moles by the smallest number calculated
the number for each is how many of each atom should be in the empirical formula
6
Q
Moles, concentration and volume
A
moles = concentration X volume
7
Q
Molar volume of a gas
A
volume of gas = moles x 24,000
