CHM 1020 Chapter Notes - Chapter 2: Nsb Di 2, Chemical Formula, Chemical Equation
Document Summary
A chemical equation is a statement using chemical formulas that expresses both the identities and the relative quantity of the reactants and products involved in a chemical or physical change. The number of atoms of a particular element is indicated by a subscript. A chemical formula is a symbolic way to represent the composition of a substance. A secondary pollutant is a pollutant produced from one or more other pollutants. For low concentrations, it is more convenient to use units of parts per million (ppm), instead of percent. This unit is of a concentration 10,000 times smaller than 1% A volatile substance readily undergoes a phase change from liquid to gas. Multiplying all coefficients by a common factor. Adding coefficients to formulas of reactants and products. During a chemical reaction, the number of different substances may or may not change, but the total mass of matter present remains unchanged. Oxygen is primarily made up of nitrogen, oxygen, and argon.
