Dr. Stephen Lukacs (October 2020)
Everything you've learned prior is about compounds, or substances on the atomic and molecular scale, very small. Now, we scale up to the human scale so that we can mix this substances on a molar level and observe the substances with human eyes and mix them with human hands.
(October 2020) Weighing the mass of reactants or products based on the molecular formula is an important first step to knowing the amount of the substance in moles.
Be sure the carefully watch how the significant figures are calculated, using both the multiplication/division rule and then the addition/subtraction rule.
(October 2020) Over 99% of all reactions occur in solution. Your very existence is the effect of billions of reactions happening every second in the bag of mostly water you call your body.
This lecture also demonstrates the calculations and procedure to create a proper solution in the laboratory.