The temperature of a fixed mass of gas in a rigid container is decreased from 150.00 degrees Celsius to 39.0 degrees Celsius. The initial pressure was 12 atm. What is the new pressure after cooling?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.