Asingle atom of oxygen cannot be subdivided into simpler substances by any physical or chemical means. therefore, it is:

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

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false