1) What is the approximate bond angle in the Co32- ion? a) 90 b) 109.5 c) 120° d

Question

1) What is the approximate bond angle in the Co32- ion? a) 90 b) 109.5 c) 120° d) 180 e) 60 2) What is the molecular geometry around the carbon atom noted with an arrow below? ?? ?-?-?-?-? a) Trigonal planar b) Trigonal bipyramidal c) Tetrahedral d) Octahedral e) T-shaped 3) What the approximate bond angle marked (a) in the molecule below? a) 90 b) 109.5 c) 120 d) 180° e) 60° What are the Electron Domain Geometry (EDG) and Molecular Geometry (MG) of the SF molecule? a) EDG tetrahedral, MG bent b) EDG trigonal planar, MG-linear c EDG linear, MG- linear d) EDGtetrahedral, MG-tetrahedral e) EDG trigonal bipryamidal, MG seesaw 4) 5) How many sigma (? ) and pi (x) bonds are there in the HOCH, molecule? 3 d. 4 b) d) 2 o,3 e) 5,1

Explanation / Answer

1) The CO32- bond angle is about 120o since it has a trigonal planar molecular geometry. Option c

2) The carbon shown has three molecules attached directly to it and has no lone pairs, so the gemoetry is trigonal planar Option a

** answering only first two questions due to time and policy constraints

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