Calculating Percent Recovery & Percent Yield. Percent Recovery: Percent recovery is used in cases where no chemical reaction is taking place, as in purification of a. sample. It is calculated as follows: % recovery =. amount pure product recovered (g) amount of crude material used (g) x 100. Percent Yield: Percent yield is used is cases where a chemical transformation occurs.
marÂ·giÂ·nal ridge. 1. An elevation of enamel that forms the proximal boundaries of the occlusal surface of premolars and molars. 2. An elevation on the mesial and distal portions of the lingual surface and, occasionally, the labial surface of incisors.
Marginal Tax Rate. View FREE Lessons! Definition of Marginal Tax Rate: The marginal tax rate is the tax rate charged on the next dollar of income. For example, if an employee is given a $1.00 raise and pays $0.15 in added taxes, her marginal tax rate equals 15 percent. Detailed Explanation: Economists use the word âmarginâ to refer to the next. Marginal cost is a supplierâs cost to provide one more unit of a good or service.