Why a person bitten by a snake can not drink alcohol

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Who discovered a pattern to the elements in 1869?