The Seven Roles of the President Name: ______________________________________________ SKILL: CIvICSThe job of the U.S. President is really seven jobs in one. What are those responsibilities? Read about them below. Then answer the following questions. A. Chief of the Executive Branch The President oversees federal (national) agencies, appointing their directors and creating policies to determine their goals during his term.
What does the term Parts Per Million (PPM) mean? Total dissolved solids (TDS) is typically expressed in parts per million (ppm). PPM is a common unit for measuring the concentration of elements in the nutrient solution. One ppm is one part by weight of the mineral in one million parts of solution.
Since one ppm means 1 microgram per gram, the number of micrograms present will be the same as the number of grams of solvent. Thus, if a substance is dissolved in one cubic meter of sulfuric acid at a concentration of one ppm, there are 1.85 million micrograms present. microgram is one-millionth of a gram. Thus, a concentration of one ppm means there is one microgram of a substance per gram of solvent. Find the mass of the solvent contained in one cubic meter. To do this, look up the specific gravity of the solvent.