Which of the following is a chemical change?

a: boiling of water
b: melting a cube of ice
c: dissolving 10 grams of salt in water
d: splitting water into hydrogen and oxygen

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?