How many moles are found in 133 g of Mg3 N2

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?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

The element that has the greatest electronegativity is