What is the concentration of this solution a?

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

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

What is the independent variable in this investigation? mass volume sample number substance density