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.
Answer: Although the numerical value of 1 mg/L amd 1 ppm are the same (1 mg/L= 1mg/1kg=1 mg/1,000,000 mg where 1kg is the weight of 1 liter of water at 4oC) the ppm vallue is usually eserved for gases in other gases as 1 ppm by volume is also equivalent 1 ppm by molar measure.