True or False: There are more genes on
Earth today than ever before.

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.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5