In what period will you find chlorine

Your answer should have the same number or significant figures as a he starting measurement. 3201 ml =

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 would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same