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- Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on, substance D HI chemical symbol, chemical formula or Lewis structure H HH ||| HHH Ar H I Ag -0. H H :O: H |||| HICIC-CIH H boiling point (Choose one) (Choose one) (Choose one) (Choose one)Which of the following gases consist of molecules containing four or more atoms? Rn O NO O CO Ar Kr CO2 Хе H,S HF H, F, N, sO, Ne HCN Cl, NO, CH, Не Sa HCI MacBook ProRank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. chemical symbol, substance chemical formula boiling point or Lewis structure H H H A H – C C - C -0 H (Choose one) ▼ | H H Ag (Choose one) В Ar |(Choose one) - H :0: H Н— С — С С — Н (Choose one) v H. ? :0 : I - O - T
- Br₂ H2O OH BrConsider the structure below. This substance should be Η Η Η Η Η Η Η Η || | | | | | | Н-С—С—С—С—С—С—С-С—ОН | | | | || | Η Η Η Η Η Η Η Η Periodic Table and Datasheet more soluble in water than in oil O equally soluble in water and in oil O less soluble in water than in oil O insoluble in water and in oilWhat is the average bond energy in CO2? CO2(g) ΔH°f, = –393.5 kJ mol–1 CO(g) ΔH°f, = –110.5 kJ mol–1 C(g) ΔH°f, = +715 kJ mol–1 CO32–(aq) ΔH°f, = –676.3 kJ mol–1 O(g) ΔH°f, = +249.0 kJ mol–1 Question 5 options: 207 kJ mol–1 1607 kJ mol–1 804 kJ mol–1
- (а) H,O, H,SO, (b) Br, H,0 (1) ВН, THF (2) NaOH, H,O," (d) Br, (е) (1) O, (2) Me,SThe arrangement of atoms in several biologically important molecules is given here. Complete the Lewis structures of these molecules by adding multiple bonds and lone pairs. Do not add any more atoms. (a) the amino acid serine: 車 0-H H-C-H H Н—N—с—с—о—н H (b) нон H-N-C-N-H (c) pyruvic acid: ноо н—с—с—с—о—н H. (d) uracil: H (e) carbonic acid: H-0-C-0-HCalculate the enthalpy change of the products. H₂ + MgCl₂ ΣAH , products = ( ( -641.8 ) + 0 =
- The table below contains some mean bond energy data: Bond H—H C-C N≡N Mean bond energy /kJ mol–1 436 348 944 (i) Balance the equation below for the formation of one mole of ammonia, NH3, from its elements. N2 + H2 → NH3 DH = -38 kJmol-1 (ii) Use the data in the table above to calculate the bond energy of N – H bond in NH3 in the reaction given in (i) above. Comment on why the value obtained is referred to as ‘mean bond enthalpy’(i) Identify the different enthalpy changes and construct the Born-Haber cycle for the formation of sodium choride (NaCl) using the information below. Calculate the missing enthalpy change value Na+(g) + Cl-(g) → NaCl (s) ∆Ho = ? Cl2 (g) → Cl (g) ∆Ho = +121 kJmol-1 Cl (g) + e- → Cl-(g) ∆Ho = -364 kJmol-1 Na (s) → Na (g) ∆Ho = +108 kJmol-1 Na (g) → Na+(g) + e- ∆Ho = +500 kJmol-1 Na (s) + Cl2 (g) → NaCl (s) ∆Ho = -411 kJmol-1Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance B C O chemical symbol, chemical formula or Lewis structure H I H :O: H ||| H-CICIC-H ||| HHH CaBc₂ CH, -N-CH, I CH, H 10: H-C-C-N-CH, Bri CH, boiling point (Choose one) (Choose one) (Choose one) (Choose one)