What volume will 2.09 moles of nitrogen occupy at 0.947 atm and 20.0ºC?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

Which method would be best to separate a mixture of sand and gravel

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction