Which of the following is NOT an example of an endothermic reaction? An ice cube melts on a summer day.
An egg cooks in a frying pan.
Water evaporates off a sidewalk.
Fireworks are displayed in the night sky.

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

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

Which terms are used to identify pure substances