Which of the following elements can form compounds with an expanded octet? Br F

Question

Which of the following elements can form compounds with an expanded octet? Br F O U Give the approximate bond angle for a molecule with a tetrahedral shape. 60 degree 109.5 degree 200 degree 120 degree A molecule containing a central atom with sp^3 hybridization has a(n) electron geometry. tetrahedral bent trigonal pyramidal linear Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force. C_2H_6 CH_3OH SCI_2 CH_2F_2 Identify the compound that does not haw dipole-dipole forces as its strongest force. HCBr_3 CH_3OCH_3 CH_3F CO_2 Assign the appropriate labels to the phase diagram shown below. A = liquid, B = gas, C solid, D = critical point A = gas, B = liquid, C = solid, D = critical point A = gas, B = solid, C = liquid, D - triple point A - solid, B = gas, C = liquid, D = triple point A - liquid, B = solid, C = gas, D = triple point What is the mole fraction of oxygen in a gas mixture that is 42% oxygen and 58% nitrogen by volume? 0.25 0.39 0.63 42

Explanation / Answer

1. IF7

B. F

2. B. 109.50

The bond angle of tetrahydral molecule is 109.50

3. A. tetrahydral

A molecule central atom involve in sp3 hybridisation. shape is tetrahydral.

4. B. CH3OH

       O-H---------O-H

5. D. CO2

weak vander waal's force between cO2 molecules

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