Maybe gas? because you can’t see it and it’s formed during a chemical reaction
To solve this problem we just need to use the rule of three:
150g..................395.1J
450g................xJ
x = 450*395.1/150 = 1185,3J
450.0 g of the substance completely reacted with oxygen will produce 1.1853 kJ(<span>kiloJoule</span>)
Carbon normally bonded to Hydrogen, Nitrogen, Oxygen
The process is called, Fixation