C₂H₂ +
O2
– CO₂ +
H₂
How many moles of oxygen are necessary to react completely with 4.0 moles of
propane (CH)?

20moles of oxygen will be required

Explanation:

The equation for the reaction of propane with O2 is given below:

C3H8 + 5O2 —>3CO2 + 4H2O

From the balanced equation,

We see clearly that 1mole of C3H8 required 5moles O2. Therefore, 4moles of C3H8 will require = 4x5 = 20 moles of O2.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the answer would be c