A calibration plot of absorbance vs. concentration (ppm) was obtained with standard known Red 40 dye solutions. The slope of the best-fit straight line of the plot is 0.043 ppm- 1 The absorbance of the dilute unknown sports drink was 0.48 What is the concentration of this dilute unknown sports drink ?

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.