Chapter 3 stoichiometry answers key ap chemistry. Molar Mass The trick: By definition, this is the mass of 1 mol of a substance (i. What is the percent composition of the hydrocarbon? Again, it is important to know that a hydrocarbon is any compound made of just hydrogen and carbon. Our resource for Chemistry includes answers to chapter exercises, as well as detailed information to walk you through the process step by step. It includes questions on balancing equations, calculating masses, and determining empirical formulas. Probably the easiest way to work this problem would be to use the answers and calculate the mass ratio for the mass of H to the total mass of compound: CH is 1/13, CH2 is 3/14, CH3 is 3/15, C2H2 is 2/26, and C2H3 is 3/27. CHAPTER 2: ATOMS, MOLECULES AND IONS. These AP Chemistry notes will cover the key topics discussed in this chapter. Molar mass of ethane (C2H6): Mass of 2 moles of C = 2(12. AP Chemistry free response answer key for stoichiometry problems. . exsjy ativw fncn dxr7 vqocds 0cdg b3d eahds fayq u6u