Even in an exothermic reaction, is needed to get the reaction started. select one: a. an endothermic reaction b. an inhibitor c. activation energy d. a catalyst

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

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.

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule