Question

The combustion reaction of propane is described by the reaction. c3h8 5o2 → 4h2o 3co2. how many moles of o2 are required to generate 3 moles of co2

Answer 1

C₃H₈ + 5 O₂ → 4 H₂O + 3 CO₂

mole ratio based on balance equation of O₂ : CO₂ i s 5 : 3
C₃H₈ + 5 O₂ → 4 H₂O + 3 CO₂

∴ if moles of CO₂ = 3 moles

then moles of O₂ = (3 moles ÷ 3) × 5

= 5 moles

Answer 2

5 moles of
`O_(2)` are required to generate 3 moles of
`CO_(2)`

Step-by-step explanation:

According to given balanced equation, 5 molecules of
`O_(2)` reacts with 1 molecules of
`C_(3)H_(8)` to produce 4 molecules of
`H_(2)O` and 3 molecules of
`CO_(2)`.

So, 5 molecules of
`O_(2)` generate 3 molecules of
`CO_(2)` or
`(5* 6.023* 10^(23))` molecules of
`O_(2)` generate
`(3* 6.023* 10^(23))` molecules of
`CO_(2)`

As 1 mol =
`6.023* 10^(23)` molecules therefore 5 moles of
`O_(2)` are required to generate 3 moles of
`CO_(2)`