an experiment was set up with three metal rods D, E and F placed in a beaker of water. After some time, bubbles were seen forming around metal E only. Another set of the same metals was placed in a beaker containing hydrochloric acid. Bubbles formed around metals E and F only a) Arrange the three metals in order of their reactivity, starting with the most reactive b)Which gas is produced in this experiment c)State how the identity of the gas mentioned can be confirmed

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.

Which metal exist in liquid state and can be cut with knife ?

What is the main reason why some developing countries fear the increase the free trade policies around the world?