Molar Mass Warmup
Use Dimensional Analysis to solve these problems
M. Lopatka WPHS
Find the molar mass for the following elements:
1 mole of an element = the atomic mass of the element in grams
Sr
Ar
K
Fe
Pt
O
Find the molar mass for the following molecules/compounds:
1 mole of a compound = to the masses of each element times the number of atoms of
each element combined
NaBr
H2O
O2
Fe2O3
Na2Se
Br2
Al2(SO4)3
Be(NO3)2
MgCl2
Determine the mass of the following samples
“Find Molar mass then multiply by # of moles given”
4 moles Co
moles H2O
6 moles H2
5
Determine the number of moles in the following samples
“Find the molar mass then divide into the given mass”
64.2 g N2
g FeCl3
302.2 g MgO
1019.3
Determine how many atoms/molecules in the following samples
“Find the molar mass then multiply by 6.02 x 1023”
1.52 moles Si
g AuCl
9.29 mol CO2
312.4