The atomic theory has been developed over many years due to the work of many scientists. Each time new evidence was discovered changes had to be made. Which of the following statements is true about how new evidence affects theories?

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

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.

What reaction is taking place? 02 + c3h8 = h20 + co2