1. REVIEW 12/11, 2007 -- MOLES For the combustion reaction
C4H8 (g) + 6 O2 (g)  4 CO2 (g) + 4 H2O (g)
a) If g. of C4H8 (g) reacts, calculate the mass of H2O that would be produced.
MOL
OBJECTIVE
STEP ONE: IDENTIFY YOUR KNOWN AND CONVERT TO MOLES
STEP TWO :MOLE (COEFFICIENT) RATIO OF KNOWN TO OBJECTIVE
STEP THREE : CONVERT OBJECTIVE TO UNITS
MOL KNOWN
STEP ONE:C4H8 to moles
STEP TWO:
C4H8 = =
H X
X = MOL H20
STEP THREE: H2O to grams
MOL = MASS
GFW
MOL = MASS
GFW
MOL = = MOL
C4H8
10.71 = X = g
H2O C+
4 x
12.0 =
48.0 H
8 x
1.00 =
56.0 G/MOL

2. For the combustion reaction
C4H8 (g) + 6 O2 (g)  4 CO2 (g) + 4 H2O (g)
a) If g. of C4H8 (g) reacts, calculate the STP VOLUME of H2O that would be produced.71
MOL
OBJECTIVE
STEP ONE: IDENTIFY YOUR KNOWN AND CONVERT TO MOLES
STEP TWO :MOLE (COEFFICIENT) RATIO OF KNOWN TO OBJECTIVE
STEP THREE : CONVERT OBJECTIVE TO UNITS
MOL KNOWN
STEP ONE:
STEP TWO:
C4H8 = =
H X
X = MOL H20
STEP THREE:
GAS VOL = MOL X 22.4
MOL = MASS
GFW
GAS VOL = X 22.4
MOL = = MOL
C4H8
GAS VOL = L

3. For the combustion reaction
C4H8 (g) + 6 O2 (g)  4 CO2 (g) + 4 H2O (g)
a) If g. of C4H8 (g) reacts, calculate the MOLARITY of of CO2 (aq) that would be produced, assume a solution volume of 10.0L.
MOL
OBJECTIVE
STEP ONE: IDENTIFY YOUR KNOWN AND CONVERT TO MOLES
STEP TWO :MOLE (COEFFICIENT) RATIO OF KNOWN TO OBJECTIVE
STEP THREE : CONVERT OBJECTIVE TO UNITS
MOL KNOWN
STEP ONE:
STEP TWO:
C4H8 = =
CO X
X = MOL CO2
STEP THREE:
MOLARITY = MOL #L
MOL = MASS
GFW
MOLARITY = 10.71
10.0L(aq)
MOL = = MOL
C4H8
MOLARITY = 1.07 mol/L