Cells are made of cells true or false

How manyatoms of mercury are in 1.4214e+1 ml sample

What is the mass of sodium in 3 moles of sodium chloride

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.