How many moles of n2 are in a flask with a volume of 250 ml at a pressure of 300 kilopascals and a temperature of 300 Kelvin

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process