Unit 3 Test Flashcards
1
Q
Molecular mass
A
The mass of one mole of molecules
2
Q
How to find percent composition
A
Mass of 1 element/ Molar mass of compound * 100
3
Q
To find the emprical formula… Find the lowest ratio of
A
Moles of elements
4
Q
To find molecular formula… Find the lowest ratio of
A
Mass of empirical formula to mass of molecular formula
5
Q
How to find molar mass
A
# of element * mass on periodic table
6
Q
Mole conversions
A
22.4 l = 1 mole
Molar mass g = mole
6.02 x 10^ 23 molecules = 1 mole (avagadres #)
7
Q
A mole is
A
A counting unit
