Calculate the wavelength (in nm) of a photon necessary to induce a transition in hydrogen from the n1 = 2 to n2 = 4. B. Once done, ccomment (on your 'work' papers) on whether the energy required for N2=2-->N2=6 would be higher or lower?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

15. what volume of cci, (d = 1.6 g/cc) contain6.02 x 1025 cci, molecules (ci = 35.5)(1) 10.5 l(2) 250 ml(3) 9.625 l(4) 1.712 lplz answer with step by step explanation