An athlete has 19% body fat by mass. What is the weight of fat, in pounds, of a 81-kg, athlete? Express your answer to two significant figures and include the appropriate units. Part D A plant fertilizer contains 12% nitrogen (N) by mass. In a container of soluble plant food, there is 14.0 oz of fertilizer. How many grams of nitrogen are in the container? Express your answer to two significant figures and include the appropriate units