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- 7. Electronegativity All about ammonia (NH3). Sb (antimony, atomic #51,) is in same Periodic Table column as N. The boiling point of SÜH3 (stibine, -17 °C) is slightly higher than NH3 (-33 °C). H 2.1 N 3.0 Sb 2.1 7a. What kinds of intermolecular interactions would occur in NH3 (1)? What kinds of intermolecular interactions would occur in SbH3 (1)? Is it surprising or expected that stibine would have a higher boiling point than ammonia? What could account for this higher boiling point?Choose the best answer Calculate the mobility of chloride ion in Cacl, if Ao.m= 260.5 moll cm2 ohm 1 and t. = 0.74 %3D a. 0.00213 b. 0.00100 c. 0.00999 d. 0.00182 e. 0.000012 Write in the vragents Bv for the following Vactrons H H OCH 3 OCH ₂
- Q5: Level 2 (T16, L.G. 13) State why the normal melting point of ICI (27.2°C) is so much higher than that of Br, (- 7.2°C). The molecules of both substances have the same number of electrons. A. The ICl molecule undergoes hydrogen bonding B. The Cl atom in the ICl molecule is more polarizable than the Br atom in the Br, molecule. C. ICl molecule is polar D. Iodine in ICl is more electronegative than bromine in Br24. Which of the following species: C6H5Cl ; Cl2 ; FeCl3 ; (CH3)3C+; HCl ; C6H6 ; CH3+ ; C6H5CH3 ; has or can display the following properties:You can only list a specie once (i) Permanent dipole : ……………………………………………….. (ii) Temporary or induced dipole : ……………………………………….. (iii) delocalised electrons : ………………………………………………. (iv) catalyst : ………………………………………………………………. (v) electron withdrawing group : ……………………………………………(vi) electron donating group : ……………………………………………….. (vii) positive inductive effect : ……………………………………………… (viii) electron deficient : ………………………………………………..MCQ 114: The highest melting point among the four clements given below is of A. Ca B. Sr С. Ве D. Bа
- 5. Consider a molecular solid such as anthracene. It belongs to a monoclinic space group P2₁/a. a= 8.5626 Å, b = 6.0388 Å, c = 11.1848 Å, and ß = 124.71°. The atom positions are given as: C (0.0873, 0.0271, 0.3656) C (0.1187, 0.1578, 0.2807) C (0.0586, 0.0803, 0.1382) C (0.0879, 0.2094, 0.0474) C (0.0304, 0.1307, 0.9101) C (0.0606, 0.2594, 0.8165) C (0.0034, 0.1806, 0.6834) H (0.1310, 0.1080, 0.4720) H (0.1960, 0.3250, 0.3170) H (0.1550, 0.3760, 0.0850) H (0.1210, 0.4300, 0.8570) H (0.0240, 0.3240, 0.6210) a. Draw a unit cell of this material showing a view down the unique b axis. Under the "Transform" menu, optimize the range and repair molecular fragments. b. The C-H bond valence parameters are Ro = 1.1 and b = 0.37. One of the C atoms is bonded to a H with a bond distance of 1.135 Å. Calculate the bond valence for this bond. C. What does this imply about the bond valence of the two C-C bonds made by this atom?v ints. That is, choose 1 next to the substance with the highest boiling Rank the elements or compounds in the table (Choose one) point, choose 2 next to the substance with th 1 (highest) chemical symbol, substance chemical formula or Lewis structure H : 4 (lowest) H C C N C H (Choose one) A H. H H :NEN 0: (Choose one) В H :0: H. |I . I (Choose one) C Н—С — С - О- С — Н .. H H. F2 (Choose one)EM NMU Inbo E B1296 N Chap THD All a M Invite Q Learr ttempt%3D3249380&cmid=1029251&page=D1 is course ▼ EduCat Resources E Hide blocks Which of the following compounds is capable of hydrogen bonding? (only 1 correct) Select one: O a. CH3COCH3 ( Hint: carbons are all attached to each other with the O off to the side on the middle C O b. N(CH3)3 OC. O c. CH3CH2NHCH3 O d. CH3CH2CH3 O e. CH,O (H and O are all attached to C) e.
- d. lonic compounds tend t8 (29. What is the couloumbic energy of MgO? E Couloumbe = (231aJ)(2) %3D a. -3.85 aJ b. +1.11 aJ C. -4.36 aJ d. -1.11 x 1018 J 30. Which of the following would release the highest amount of energy when it goes from a gas state to a crystallized state? ny? a. Cao b. MgO C Sro d. BaoWhat is the melting point of the substance modeled by this heating curve? F 150 135 120 D E 105 90 75 C 60 45 30A 15 Heat (kJ) Created by E. Lee for Virtual Virginia (2021) Temp. (°C) BBelow is shown the atomic packing of a set of planes for the simple cubic crystal structure; atoms drawn to full size are represented by circles. From the list below select the set of indices for this plane. OC. (11 1) O B. (100) O D. (110) O A. (120)