Question

A)How many moles of O2 are required for the complete combustion of 2.2 g of C3H8 to form CO2 and H2O?




b)A 65.25 g sample of CuSO4•5H2O (M = 249.7) is dissolved in enough water to make 0.800 L of solution. What volume of this solution must be diluted with water to make 1.00 L of 0.100 M CuSO4?

Answer 1

A)
C3H8 + 5O2 ==> 3CO2 + 4H2O
mols C3H8 = 2.2 g/molar mass C3H8.
Convert mols C3H8 to mols CO2.

b)
mols CuSO4.5H2O = g/molar mass
M = mols/L soln.

Then use the dilution formula of
c1v1 = c2v2
c = concn
v = volume

Answer 2

306mL