Carbon Dioxide - Density

Carbon Dioxide and combustion - Mix vinegar and baking soda in a container and wait for the bubbling to slow down or cease.  Carbon dioxide is released in this reaction.  Gently pour the carbon dioxide gas onto a lit candle which is in a beaker. 

NaHCO3(s) + CH3COOH(l) → CO2(g) + H2O(l) + Na+(aq) + CH3COO-(aq)