Question 5.11: The combustion of acetylene with pure oxygen produces a very...

The combustion of acetylene with pure oxygen produces a very high-temperature flame used for welding and cutting metals. Calculate the volume of $O_{2}$ (in liters) required for the complete combustion of 7.64 L of acetylene ( $C_{2}H_{2}$ ) measured at the same temperature and pressure.

2C_{2}H_{2}(g) + 5O_{2}(g) → 4CO_{2}(g) + 2H_{2}O(l)

Strategy Note that the temperature and pressure of $O_{2}$ and $C_{2}H_{2}$ are the same. Which gas law do we need to relate the volume of the gases to the moles of gases?

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