In forming covalent bonds where the octet rule is obeyed, sulfur usually forms ________ bonds and chlorine usually forms ________ bonds. A) one; one B) two; two C) one; two D) two; one E) six; seven 6. The number of valence electrons in the acetic acid molecule (CH3CO2H) is ________. A) 0 B) 8 C) 16 D) 24 E) 32 7. A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape.
(2 marks) 8 Show 2 possible products that could form when Compound H undergoes a halogenation reaction with iodine. Draw the structural isomers and name them. 2 marks 9a Is this halogenation reaction is an addition or substitution reaction? ½ mark 9b Under what conditions would this reaction occur? ½ mark 10 Outline the reaction pathway to produce propanoic acid from propane.
Which pairs will react from an ionic compound? Chlorine and oxygen Nitrogen and Lithium b. Which pairs will react from a molecular compound? Flour nine and Argon c. Which pairs will not react to form a compound? Aluminium and potassium 7) A certain particle was found to contain sixteen protons and eighteen electrons.
a) for a we first need to find a balanced equation for when the hydrocarbons combust to form CO2 and H20. Then we plug in the deltaHf values and plug these into the equation. a) C4H6 + 11/2O2 ==> 4CO2 + 3H2O Delta Hrxn = [4DeltaHf(CO2)+3DeltaHf(H2O)] - [DeltaHf(C4H6) + 11/2DeltaHf(O2)] = [4(-393.5kJ) + 3(-285.83kJ)] - [111.9kJ + 11/2(0kJ)] = -2543.39kJ C4H8 + 6O2 ==> 4CO2 + 4H2O Delta H rxn = [4DeltaHf(CO2) + 4DeltaHf(H2O)] - [DeltaHf(C4H8) + 6DeltaHf(O2)] = [4(-393.5kJ) + 4(-285.83kJ)] - [1.2kJ +6(0kJ)] = -2718.52kJ C4H10 +13/2O2 ==> 4CO2 +5H2O DeltaHrxn = [4DeltaHf(CO2) + 5DeltaHf(H2O)] - [DeltaHf(C4H10) + 13/2DeltaHf(O2)] = [4(-393.5kJ) + 5(-285.83kJ)] - [-124.7kJ +
Final exam chem 2014 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. A central concept of the kinetic theory, one of the “big ideas” of chemistry, is the belief that a.|for every reaction there is an equal and opposite reaction.| b.|chemical reactions involve processes in which reactants produce products.| c.|the particles in matter are in a state of constant motion.| d.|every chemical process uses or produces energy, often in the form of heat.| ____ 2. In a chemical reaction, the type of products obtained is largely determined by which part of the reacting chemicals? a.|protons| b.|electrons| c.|neutrons| d.|nuclei| ____ 3.