PLLS THIS IS DUE IN 15 MINUTES I REALLY NEED HELP. FULL OUT AS MUCH AS YOU CAN PLS

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.

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?