About how much carbon monoxide is produced in these two different reations? The U.S. Department of Agriculture produces a gas cartridge to poison subterranean rodents.  The product is provided as a cardboard tube sealed at one end and then loaded with a mixture of 144.6 grams of the following ingredients:

53.0% Sodium Nitrate
28.0% Charcoal
19.0% Inert Ingredients

Once filled, the cardboard tube is sealed at the other end with a thin cardboard cap which can be punctured and a fuse inserted when ready to be used.  The gas cartridge's advertised function once lit is to generate a large volume of carbon monoxide that kills the rodent within a few minutes in its burrow.  My experience has been it is very effective when used according to the instructions.

The USDA gas cartridge is getting harder to obtain anymore and a commercial producer sells a similar product which is utilized in the same applications.  But it is smaller and uses a somewhat different formulation.  It does not advertise how the rodent is poisoned, so I don't know if the resulting gas from combustion is primarily CO or something else.  My experience has been that it doesn't seem to be as effective as the USDA gas cartridge, but I don't know if it is because of its different formulation or just its smaller size.  The 56.7 gram mixture of ingredients in this commercial gas cartridge are as follows:

50.0% Sodium Nitrate
38.0% Sulfur
9.0% Charcoal
3.0% Inert Ingredients

The question is how much carbon monoxide is generated by each of these cartridges when their ingredients are ignited and what are the quantities of other resulting gases?  Just straight theory here is good enough for me.  I know there are probably variables such as how well the ingredients are ground and mixed and what are used as the inert ingredients in each.  But lets just leave those variables out of the equation.
About the best that can done is simply to look at the ratio of carbon in the two cartridges. 


  
    $\dfrac{56.7*0.09}{144.6*0.28} = 12.6$%
  


The ratio of carbon dioxide to carbon monoxide formed on burning would depend on particle size, how well mixed an so on. The second formulation with sulfur is akin to black gun powder. The sulfur burns first at a lower temperature to ignite the charcoal. The sulfur dioxide would be toxic as well, but not as fast acting as carbon monoxide.