14 m3 of gas at a pressure of 3.0 atmospheres is compressed into a volume of 9.0 m3. Under what amount of pressure is the sample of gas after the compression?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.