Aground state hydrogen atom absorbs a photon of light having a wavelength of 94.92 nm. it then gives off a photon having a wavelength of 4.050 × 103 nm. what is the final state of the hydrogen atom?

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

If two objects at different te,peraure are in contact with each other what happens to their temperature