The temperature of a sample of iron with a mass of 10.0 g changed from 50.4°c to 25.0°c with the release of 47 calories of heat. what type of reaction id occurring?

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2