An electron is present at an energy level with an energy of 5.44 x 10−19 j. after a second, the electron is present at an energy level with energy, 2.4 x 10−19 j. what most likely happened during the transition?
a photon of energy 7.84 x 10−19 j was released.
a photon of energy 3.04 x 10−19 j was released.
a photon of energy 7.84 x 10−19 j was absorbed.
a photon of energy 3.04 x 10−19 j was absorbed.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.