# In a sample of carbon dioxide, there is a 3.2*g with respect to oxygen...what is the mass of carbon dioxide?

Approx....$4.4 \cdot g \ldots \ldots . .$
There are $\frac{3.2 \cdot g}{16.00 \cdot g \cdot m o {l}^{-} 1} = 0.20 \cdot m o l$ WITH RESPECT TO OXYGEN atoms (note the distinction between oxygen atoms and oxygen molecules).
And THUS WITH RESPECT TO CARBON DIOXIDE we need a $0.10 \cdot m o l$ quantity of carbon dioxide (in as much as each mole of carbon dioxide supplies 2 mol of oxygen atoms)....
And so $0.10 \cdot m o l \times 44.01 \cdot g \cdot m o {l}^{-} 1 = 4.40 \cdot g$ of carbon dioxide.....