What is the empirical formula of the compound with the following molecular formula?

C4H4O2

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Why doesn't heat added to water make the tempature rise above 100c

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins