A buffer is prepared by adding 150 ml of 1.0 m naoh to 250 ml of 1.0 m nah2po4. how many moles of hcl must be added to this buffer solution to change the ph by 0.18 units?

Describe the interaction that occurs between two objects with the same electrical charge.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

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?