An excited hydrogen atom emits lift with a wavelength of 397.2nm to reach the energy level for which n=2 in what principal quantum level did the electron begin . (b) what is the number of electrons orbital s and the names of the subshells associated with the initial principal quantum level

Why are pipes bursting in the in extremely cold weather?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3