What is the molarity of a solution that is made by adding 57.3 g of MgO to 500.0 mL of solution?

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?

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide