All of the following statements are true of compounds EXCEPT * compounds are composed of various elements.
the processes that form compounds can not be reversed.
a compound is a pure substance.
compounds are joined by a chemical reaction.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Draw the structure for 5-isopropyl-2-methyl-3-nonene

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