Describe what happens when two substances at different temperatures come into contact. Describe how the law of conservation of energy applies to this system. Give an example of where this could occur in your everyday life. Is your example an endothermic or exothermic reaction? How do you know?

Type the letter that represents the correct location for each particle type below.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

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