Did67 wrote:No need to fight.
As a first approximation, it is derived from glucose: C6H1206.
No, it is a mixture of cellulose, hemicellulose and lignin; even if you arrive substantially at the same result (from 6 to 8% of hydrogen) the reasoning is incorrect.
It is of course necessary to add the water naturally present in the wood, that is 10 to 15% for a wood in equilibrium with a normal atmosphere (about 50% of hygrometry).