Atomic emission experiments of a mixture show a calcium line at 422.673 nm corresponding to a transition and a doublet due to potassium 2P3>2 and : 2S1>2 For the sodium 3p 2P3>2 ¡3s 2S1>2 transition, n0 = transitions at 764.494 and 769.901 nm, respectively. a. Calculate the ratio for each of these transitions. b. Calculate for a temperature of 1600°C for each transition.

what is the density of an object that has a mass of 10 g and a volumeof 5 ml? a. 0.5 g/ mlb. 2 g/mlc. 15 g/ mld. 50 g/ ml

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?