Which of the following is the correct angle between the atoms in a tetrahedral molecule? a. 90o b. 109o c. 120o d. 270o

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

Is the idea of spontaneous generation supported by redi's experiment? justify your answer in 2-3 sentences?