The vapor pressure of the liquid hf is measured at different temperatures. the following vapor pressure data are obtained: temperature 270.6k and 287.5k, pressure 324.5 mmhg and 626.9 mmhg. calculate the enthapy of vaporization ( delta h vap ) in kj/mol for this liquid.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Which of the following are appropriate acceleration units?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.