Write the condense structural formula of the following compounds. 1. The alkene 2,7 Undecadiene with the molecular formula C11H20 (Note the number of double/triple bonds present)

2. 8 Nonene with the molecular formula C9H18

3. Write the condense structural formula of 5 Decyne with the molecular formula C10H18

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

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