Which parts of an atom contribute most to its mass?

The first element on the periodic table of elements is carbon. a. true b. false

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.