In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. Part A Find the speed for a star in which this line appears at wavelength 120.8 nm . Express your answer to three significant figures and include the appropriate units.

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g

Word equation for k(s) +h2o(l) yield koh (aq) + h2

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.