Write the empirical formula for at least four ionic compounds that could be formed from the following ions: nh, ion, cio, fe2+ . 0, x 6 ?

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer