Answer:
see explanations
Explanation:
a. The central atom bonded to four substituent atoms and having no lone pair.
This is an AX₄ geometry => tetrahedron
b. The central atom bonded to three substituent atoms and having one lone pair.
This is an AX₃E geometry => pyramidal
c. The central atom bonded to two substituent atoms ảnd having
one lone pair.
This is an AX₂E geometry => bent angular
d. The central atom bonded to two substituent atoms and having no lone pair.
This is an AX₂ geometry => linear
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Based upon the VSEPR Theory there are 6 parent geometry configurations and associated derived geometries.
Parent geometries => Derivatives => Examples
- linear => AX₂ (BeCl₂)
- trigonal planer => AX₃ (BH₃) => AX₂E (Bent) (:SnCl₂)
- tetrahedral => AX₄ (CH₄) => pyrimidal AX₃E (NH₃) => Bent AX₂E₂ (H₂O)
- trigonal bipyrimidal => AX₅ (PCl₅) => seesaw AX₄E (:SF₄) => T-shaped AX₃E₂ (ClF₃ (T-shaped) => linear AX₂E₃ (XeF₂)
- octahedral => AX₆ (SF₆) => sqr pyramid AX₅E (IF₅) => sqr planar AX₄E₂ (XeF₄)
- pentagonal bipyrimidal => AX₇ (ClF₇)
For graphic images of each geometry do an internet search for 'molecular geometry'.
Answer:
Option B is correct.
A buffer is best used in pH ranges from one unit below up to one unit above its pKa.
Explanation:
The ability of a buffer solution to maintain a nearly constant pH when small amounts of acids or bases are added to the solution is greatest at the pKa & reduces as the pH of the solution goes above or below the pKa. A rule-of-thumb is to use a buffer within 1 pH unit of the pKa to maximize its buffering capacity.
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Answer:First calculate the moles of selenium by multiplying the mass x molar mass 90.2 × 78.96 = 7122.2 moles. Number of moles multiplied by ...
Explanation:
Answer:
salty foods
Explanation:
Salty foods like chips, frozen dinners, and fast food may impair your body's immune response, as high salt diets may trigger tissue inflammation and increase the risk of autoimmune diseases.