The man was requested to solve a short, basic chemistry exercise. He starts by explaining the meaning of the terms involved in the problem: molecular mass, empirical formula and molecular formula. He also explains the way the are connected, for a better understanding of the way the exercise is solved.
Using a sheet with all the operations used in finding the solution, he explains the exercise step-by-step, showing the viewer only the current operation.
The steps he uses for finding the final answer are: calculating the molecular mass for the empirical formula, finding the "multiplier" by diving the given molecular mass to the molecular mass of the empirical formula, and multiplying the number of atoms of each element in the empirical formula with the "multiplier" to reach the final molecular formula, the solution of the exercise.
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