H2O ionic or covalent

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

What can be done to make a solid solute dissolve faster in a liquid solvent?