In which of these samples do the molecules most likely have the least kinetic energy?

solid iron at 25°c

molten iron at 1600°c

solid iron at 98°c

iron vapor at 2900°c

Solid iron at 25°C
the cooler the temperature the less energy the particles have

I think the correct answer from the choices listed above is the first option. It would be the solid iron at 25 degrees Celsius where the molecules have the least kinetic energy. The lower the temperature, the lower the kinetic energy of the molecules. Hope this helps.

If football was tossed in air without gravity or friction the ball would go into space

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction