calculations involving masses Flashcards
1
Q
what is the empirical formula?
A
the simplest whole number ratio of atoms or ions of each element in a substance.
2
Q
what is a molecular formula?
A
actual number of atoms or ions of each element in a substance.
3
Q
what is relative formula mass?
A
the relative sum of atomic mass (ar) of all the atoms in the substance
4
Q
how to work out power?
A
energy transferred / time
5
Q
how many particles are in 1 mole?
A
6.02 x 10^23
6
Q
what is the units for moles?
A
g/ mol
7
Q
what is the equation for moles?
A
mass = mr x moles
8
Q
What is a limiting reagant?
A
the element or substance that limits the reaction.
