HO HO, + 4 HI Но. OH |4 CH,ОН, Н*

please write the number that corresponds to the correct Lewis structure for the molecule shown in the box below. H H H-C-C-Ö-Ö-H_C-H-C-Ö-H H structures? :O: H C-H-C-O-HH-C-Ö-Ö-C-H || CH3CO₂H ܪܬܐܒܪܘܘܢ || H :O: | || H-C-C-O-H ||| IV H-C-C=Ö-Ö-H write the numbers of the following bond-line structures that represent identical V IV

F с Br + K ОН Br Н OCH 3 CI M я ОН С NH

A B с D Br ?а OH В ? OH CN C ? [Choose ] t [ Choose ] [Choose ] OH [Choose ] OH SMe

Describe the process of sublimation in terms of heat energy, relating what happens to the behavior of matter. Answer in complete sentences. H I ||| Normal E = AA Enter your answer here ||' _||| = BIUS √x X₂ 2 Ix

Given these reactions, where X represents a generic metal or metalloid 1) H, (g) + 0,(g) → H,0(g) AH1 = -241.8 kJ 2) X(s) + 2 Cl,(g) → XCl,(s) AH2 = +475.9 kJ 3) H,(g) + CL,(g) HCl(g) АНз 3 —92.3 kJ → 4) X(s) + O,(g) –→ XO,(s) AH4 = -748.7 kJ 5) Н, О(2) — н,00) AH5 = -44.0 kJ what is the enthalpy, AH, for this reaction? XCI, (8) + 2H,О() — ХО,(8) + 4 HCI(g)

1) Og I Zn, HOAc 2) MeMgBr then H+ Me OH НО -Me

Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔΗn = ΣηΔΗ; (products) – Σπ.ΔΗ (reactants) where n represents the stoichiometric coefficients. Part A Calculate the standard enthalpy change for the reaction Use the following data: ΔΗ; Substance (kJ/mol) A B C D ΔΗ; = -237 -385 205 -515 Submit Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) μА Value Previous Answers 2A + B2C + 2D Review | Constants I Periodic Table Units ?

Which molecule is a complete organic molecule (i.e. all atoms are shown correctly)? A H. c=C–C= C–H H C H. C=C-C-C-H | H. H. C H. C- D H. нн . C С —С—Н C=C–C- C-H H H. ОН Н А I-0-I エーO I-Ú-I I-U-I I-U-I エー○

1. More than 2000 years ago human cultures figured out a way to produce iron metal from rocks containing iron ores. This iron could be worked by a blacksmith (repeated heating and hammering) to make iron metal pure enough for creating useful tools (even Samurai swords). This direct heating technique was common up until about 200 years ago when people found a better way to obtain iron metal. When hematite, Fe2O3(s), is strongly heated in a blast furnace in the presence of charcoal (carbon), pure iron metal is obtained. Fe2O3() 2 Fe(s) + 3/2 O2 (g) (1) C(s) + O2 (g) → CO2(g) (2) When reaction 1 is coupled to reaction 2, overall chemical equation is Fe2O3() + 3/2 C() 3/2 CO2(g) + 2 Fee) Use the thermodynamic data given below for the following calculations: AG¡ (kJ/mol) | 4H¡ (kJ/mol) | S (J/mol-K) Fe2O3(s) -742.2 -824.2 87.40 Fes) 27.28 CO2(8) -394.36 -393.51 213.74 C (6) 5.74 O2 (2) 205.14 a) Calculate the standard Gibb's free energy change for reaction 1 b) Calculate the standard Gibb’s…