3. The pi electrons of an alkene can act as a base (see example below). Explain why the cis-dibenzoylethylene produced in this experiment can be isomerized back into trans-dibenzoylethylene by heating an ethanol solution of cis-dibenzoylethylene with a few drops of H2SO4.

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

Matches the chemical name of each oxide of phosphorus to its chemical formula

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms