An atom emits a photon of light with an energy of 226.4 kJ/mol. What region if the visible light spectrum is this? (In order to find it - wavelength must be calculated). Please show work! First correct answer gets -est!

Name the element in group 17, period 2. (periodic table)

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.