For the following reaction, 3.54 grams of nitrogen gas are mixed with excess hydrogen gas. The reaction yields 4.02 grams of ammonia nitrogen(g) + hydrogen(g) – — ammonia(g)
grams
What is the theoretical yield of ammonia ?
What is the percent yield for this reaction ?
%

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Which statement best describes the flow of energy in this scenario

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules