Acetylene gas (C2H2) used in welding, pro - duces an extremely hot flame when it burns in pure oxygen according to the reaction
2 C2H2 (g) + 5 O2 (g) - → 4 CO2 (g) + 2 H2O (g).
How much CO2 is produced when 20000 g of C2H2 burns completely?
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