Areaction x< > y occurs in a closed vessel. when it reaches equilibrium at temperature t, the number of molecules changing from x to y is equal to the number of molecules changing from y to x

true or false.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium