If an electron in the n=9 energy level of a hydrogen atom relaxes down to the n=5 energy level, determine the energy of the photon (in kJ) released in the process.

How do you lengthen a pattern piece? (family and consumer science, sewing)

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x