Jared sprayed a pesticide on his garden three times. The first time, many insects died. The second time fewer insects died. The last time very few insects died. What impact did the insecticide have on the species of insects? A. All of the insects were resistant to the insecticide. B. The species became less resistant to the insecticide. C. The species became more resistant to the insecticide. D. None of the insects were resistant to the insecticide.

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.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?