If 15 grams of carbon dioxide is produced in a chemical reaction, how many grams of carbon must be consumed in the reaction if we know there were 11 grams of oxygen on the reactants side of the equation?

Quantity of Carbon is 4.09 gm

Explanation:

Equation of carbon reacting with oxygen to give carbon dioxide is given by

C + ⇒ C

One mole of carbon reacts with one mole of Oxygen in this reaction to give One mole of Carbon dioxide.

So, 12 gm of carbon reacts with 32 gm of Oxygen in this reaction to give 44 gm of carbon dioxide.

15 gm of C was formed in this reaction

Oxygen used in this reaction = ×32 = 10.91 gm ,

Thus Oxygen is in sufficient quantity in the reaction.

Now,

Carbon that must be used = ×12  = 4.09 gm.

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