Which is a characteristic of aromatic hydrocarbons? O A. Oxygen atoms bonded to hydrogen atoms
OB. Two hydrogen atoms bonded together
O C. Bonds between oxygen and carbon atoms
O D. Alternating single and double bonds

Forests and meadows are often cut down to make way for farms or large number of new homes. what are some of the elements of ecosystems that are lost when plants in these areas are removed?

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

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