In the reaction of: H2 + I2 --> HI In Over the first 20 seconds, the concentration of H2 decreased by 0.03 M. What amount would you expect the concentration of H to change over the same 20 second interval?

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

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