What is the percent composition by mass of oxygen in the compound mgso4.

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

How are the terms group and period used on the periodic table

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