Which of the following is true about the Lewis structure of NF3? -26 valence electrons have to be accounted for in NF3
-There are single covalent bonds between N and F
-The N atom is less electronegative than the F and so occupies the central position in the skeletal structre
-All of the above

What forms when chemical reactions combine pollution with sunlight?

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

Which terms are used to identify pure substances