N-N H-S-C -S-H

Identify the main group to which X belongs in each of the following ionic compound formulas. (a) AlɔX3 (b) X(NO3)2 (c) CaX2

Covalent bonds are directional and “saturated”; ionic bonds are “unsaturated” and “non-directional”. (a) Explain why. (b) What are general consequences of the differences in the bonding characteristics?

HCI VIO 4. Draw the Lewis structures for the following: (a) K (b) Cl (d) Ca2 (c) O2 nolar and which U he T0IIOWINO would you preo

Please don't use hend raiting and step by step solutions

Arrange the following in the order of the property indicated for each set–(a) F2, Cl2, Br2, I2(Increasing bond dissociation energy).(b) HF, HCl, HBr, HI (decreasing acid strength).(c) NH3, PH3, ASH3, SbH3, BiH3(decreasing base strength).

(b) The Murchison meteorite that landed in Australia in 1969 contained 92 different amino acids, including 21 found in Earth organism A skeleton structure (single bond only) of one of these extraterrestrial amino acids is shown below. Draw a Lewis structure, and identify any atoms having a nonzero formal charge. H3N. C ČH2 ČH3 (c) Draw the orbital diagrams and Lewis symbols to depict the formation of Na* and CI ions from the atoms. Give the formula of the compound formed. (d) The predicted bond length for HF is 109 pm (the sum of the covalent radii of H, 37 pm and F, 72 pm), however the actual bond length for HF is shorter (92 pm). It was observed that the difference between predicted and actual bond lengths becomes smaller going down the halogen group from HF to HI Describe these observations

The structure of sodium hyaluronate, a sodium salt of hyaluronic acid used in skincare products for its hydrating properties, is shown below. What is the shape of the bonds at (ii) ? Hint: atom (iii) has been completed for you as an example. (iii) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the bonds: tetrahedral ОН, OH ·•·•·||||| N O H H Ol.. OH |||| iv + Na

Draw Lewis structures and any contributing resonance structures for each structure below. Use the proper type of arrow to indicate that they are resonance structures. In which structure is resonance more important? (a) H2SO3 (b) (HSO3)^1- (c) (SO3)^2-

1. Hydrogen (H2) and oxygen (O2) react to produce water (H2O). (a) Write down the equation for the above reaction. (b) The enthalpy change of reaction is –286 kJ mol-!. Is the reaction endothermic or exothermic? (c) What kinds of bonds are broken during the reaction? (d) What kinds of bonds are formed during the reaction? (e) Construct a diagram showing the change in enthalpy for the reaction.