Oxidation-reduction reactions a. must include oxygen. b. can include an atom or ion being reduced without an atom or ion being oxidized. c. do not need to have both an oxidation and a reduction reaction. d. must include a transfer of electrons from one atom or ion to another.

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

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.

The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll