To what temperature must 6.50 moles of gas have to be heated in a 15.0 container for it to exert a pressure of 7.50 atm?

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

What if it is did darwin used to support his theory of evolution

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures