4. Draw complete structural formulas for the following alkanes. a. Octane I
b. 3-ethylhexane

5. Write a condensed structural formula for 2,2-dimethylbutane.

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots