# When 3.0 g of carbon is burnt in 8.0 g of oxygen, 11.0 g of carbon dioxide is produced. what is the mass of carbon dioxide will be formed when 3.0 g of carbon is burnt in 50.0 g of oxygen? Which law of chemical combination will govern the answer?

Nov 23, 2016

A mass of $11.0 \cdot g$ of carbon dioxide will again be produced.

#### Explanation:

When a $3.0 \cdot g$ mass of carbon is burnt in an $8.0 \cdot g$ mass of dioxygen, the carbon and the oxygen are stoichiometrically equivalent. Of course, the combustion reaction proceeds according to the following reaction:

$C \left(s\right) + {O}_{2} \left(g\right) \rightarrow C {O}_{2} \left(g\right)$

When a $3.0 \cdot g$ mass of carbon is burnt in an $50.0 \cdot g$ mass of dioxygen, the oxygen is present in stoichiometric excess. The $42.0 \cdot g$ excess of dioxygen is along for the ride.

The law of conservation of mass, $\text{garbage in equals garbage out}$, applies for both examples.

Most of the time, in coal-fired generators, and certainly in the internal combustion engine, carbon oxidation is incomplete, and $C O$ gas and particulate carbon as soot, are products with $C {O}_{2}$.

Capisce?