22 kg of carbon dioxide would be produced.
From the balanced equation of the reaction:
C (s) + O2 (g) ---> CO2 (g)
The mole ratio of C input to CO2 produced is 1:1.
Mole of 6 kg C = mass/molar mass
= 6000/12
= 500 moles
Hence, the equivalent mole of CO2 would also be 500 moles.
Mass of 500 moles CO2 = mole x molar mass
= 500 x 44
= 22,000 g or 22 kg
More on stoichiometric calculations can be found here: https://brainly.com/question/8062886