Give a reason 4. Excess magnesium ribbon sample was heated in qual volumes of (1) Pure oxygen gas (ii) Air (a) Why was the mass of the resulting product in () more than in a (b) Write the equations for the reactions in part(ii)​

What is the nature of the ca-cl bond in a molecule of calcium chloride (cacl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.16?

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

Compare and contrast physical changes with chemical changes.