What is the energy (in joules) and the wavelength (in meters) of the line in the spectrum of hydrogen that represents the movement of an electron from Bohr orbit with n = 3 to the orbit with n = 5?

Determine the reaction and balance the following equations urgent due in the morning

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?