Mention the effects of application chemistry knowledge on environment and measures to overcome such effects.
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Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

How have the greenhouse gasses increased from the year 2000 to 2018

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