The visible red spectral line that results from the n = 3 to n = 2 transition of the hydrogen atom has a wavelength of 656 nm. Calculate the energy change that produces this spectral line.

bcde is the incorrect answer it is a

you need to have a picture of the atom that way we can answer it

hcl + naoh → h2o + nacl

explanation:

hcl + naoh → h2o + nacl   is the reaction that is correctly balanced.

however, pcl3 + h2 → ph3 +3hcl, 2ca+ 3cl2 → cacl3, and c5h12 + 5o2 → 5co2 + 6h2o are not correctly balanced.