If you burn 50 pounds of firewood, and weigh the wood and the air that is consumed, the total weight of the combustion products is the same minus a quantity that is about 10 to the power of minus 32 ....

And no scales that will measure 50 pounds are that accurate...

If someone gave you $1 billion plus or minus one cent, that is only about 10 to the power of minus 11...

:-P