1.

% composition of dry fuel gases by volume with 20% air

Answer»

Explanation:

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air ALSO contains a VARIABLE amount of WATER vapor, on average AROUND 1% at sea level, and 0.4% over the entireatmosphere.



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