If 20.0 ml of 0.1 M HCl are required to neutralize 20.0 ml of NaOH, what is the concentration of the NaOH?

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.

98 ! and brainliest plz ! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.