Mole Calculations Assignment
Name: _________________________
Be sure to show your work when doing your calculations! It is worth marks!
1. What are the molecular weights or formula unit masses of the following compounds?
a) KCl
b) H2SO4
2. Find the molar masses of the following compounds:
a)
NaNO3
b)
CuSO4
3. Calculate the moles based on the provided mass.
a) How many moles are in 26 grams of potassium?
b) How many moles are in 104.6 grams of aluminum sulphate, Al2(SO4)3?
c) How many moles are in 102 grams of copper (II) hydroxide, Co(OH)2?
4. Calculate the mass of the following.
a) How many grams are in 66.5 moles of sodium?
1
b) How many grams are in 5.8 moles of sodium chloride, NaCl?
c) How many grams are in 0.05 moles of beryllium iodide, BeI2?
d) How many grams are in 56 moles of aluminum?
5. Calculate the number of atoms/formula units based on the provided mass.
a) How many atoms are there of copper in a sample with a mass of 105 g?
b) How many formula units of Silver iodide (AgI) are there in 54.0 g of AgI.
c) How many molecules of sulphur dioxide (SO2) are there in a tank with a mass of 14 g?
d) How many atoms of magnesium are there in a 64 g sample of magnesium bromide
(MgBr2)?
2