In a closed vessel, 24 g of graphite in 67.2 liters of oxygen was burned and the volumetric

In a closed vessel, 24 g of graphite in 67.2 liters of oxygen was burned and the volumetric ratio oxygen: product was equal.

Graphite is an allotropic compound of carbon, therefore its formula is C.
Reaction equation:
C + O2 = CO2.
According to the equation: when 1 mol of C interacts with 1 mol of O2, 1 mol of CO2 is formed.
Let’s find the amount of graphite and oxygen substance given in the problem statement.
N (C) = 24g: 12g / mol = 2 mol,
N (O2) = 67.2 L: 22.4 L / mol = 3 mol.
According to the reaction equation, 2 mol of C can react with 2 mol of O2, which means that 1 mol of O2 will remain.
According to the equation from 2 mol C, 2 mol CO2 is formed, which means the ratio of oxygen and the reaction product (CO2) will be 1:2.