I'm not quite sure on what i'm supposed to do, i'd appreciate an explanation.

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

How does the viscosity of magma change as magma cools?