Answer :
Step 1: let's transform 16 grams fo O2 into moles.
For this, we use the following equation: moles = mass/molar mass
molar mass of O2 = 32 g/mol
mass = 16 g
moles = 16/32
moles = 0.5 moles of O2
Step 2: C3H8 +5O2–-> 3 CO2 + 4 H2O
The equation tells us that 5 moles of O2 react and produce 3 moles of CO2
5 moles of O2 --- 3 moles of CO2
0.5 moles of O2 --- x moles of CO2
5x = 0.5 x 3
x = 0.3 moles of CO2
Step 3: We transform 0.3 moles of CO2 into grams using the following equation: mass = moles x molar mass
molar mass of CO2: 44 g/mol
mass = 0.3 x 44
mass = 13.2 g
Answer: It will form 13.2 g of CO2
