Phosphorus trichloride, pcl3, decomposes to form elemental phosphorus and chlorine. the equation is: 4pcl3 → p4 + 6cl2. balance the equation and determine the mass in grams of chlorine that would be formed if 25 grams of pcl3 (molecular mass = 137.32 g/mol) decompose.

An engineering team designs a new rocket that is faster and lighter than any other model being produced. however, the materials end up being so expensive that no company can afford to buy them. which step of the engineering process should have addressed this problem? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?