Aballoon contains 2500 ml of helium gas at 75 degrees celsius. what is the final volume in millimeters of gas when the temperature changes to each of the following, if n and p do not change?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

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?

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?