A block of ice is placed outside on a hot summer day. Describe the changes in particle motion and the corresponding changes in energy as the ice melts and eventually becomes water vapor.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

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

What produces wave a)sound b) heats c)transfer of energy d)vibrations