What is the pressure of 2.0 mol nitrogen (N2) gas in a 0.5 L container at 310 K?
(The universal gas constant is 0.0821 L. atm/mol. K.)

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

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?

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