Name: ______________________________
Date: _____________________
17 Notes: Moles and Formula Mass
Define atomic mass: _____________________________________________________________
Define mole: ___________________________________________________________________
What is Avogadro’s number: ______________________________________________________
How are Avogadro’s constant and a mole related? _____________________________________
______________________________________________________________________________
What is the mass of a sample of substance related to?
1. ________________________________________________________________________
2. ________________________________________________________________________
Moles and number of particles are which type of property? _____________________________
Why have scientists had to study each individual element to determine their atomic masses?
______________________________________________________________________________
What is the smallest particle of a covalent compound? _________________________________
What structures do ionic compounds form? __________________________________________
What do we call the theoretical units of ionic compounds? ______________________________
Define formula: ________________________________________________________________
What is the ratio of elements in each of the compounds below:
H2O = ____H : ____O
CO2 = ____C : ____O
MgI2 = ____Mg : ____I
NH3 = ____N : ____H
NaCl = ____Na : ____Cl
PBr5 = ____P : ____Br
C6H12O6 = ____C : ____H : ____O
NaOH = ____Na : ____O : ____H
KHCO3 = ____K : ____H : ____C : ____O
CuSO4 = ____Cu : ____S : ____O
How do you find the formula mass of a compound? ____________________________________
______________________________________________________________________________
Determine the formula mass of each of the following compounds:
NH3 = __________________________
NaCl = __________________________
MgBr2 = __________________________
C6H12O6 = __________________________
CuSO4 = __________________________
PBr5 = __________________________
The 7 diatomic elements: ________________________________________________________
50.0 grams of Al = __________ moles of Al
5.00 mol of K = _____________________ atoms of K
1.50 x 1024 molecules of CO2 = _______ moles of CO2
3.00 moles O2 = __________ grams of O2
2.25 mol of S = _____________________ atoms of S
25.0 grams of C = __________ moles of C
1.25 grams H2O = __________ moles of H2O
1.37 x 1024 molecules of NH3 = _______ moles of NH3
20.0 grams of CH4= __________ moles of CH4
4.00 moles of NH3 = __________ g of NH3