18. The referee whistle for a foul in a game of football. Identify the stimulus and response.

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c