How many electron groups are around the central atom in a molecule of water? A)

Question

How many electron groups are around the central atom in a molecule of water? A) 1 B) 2 C) 3 D) 4 E) 5 What would you expect to have happen to the pressure of a system if the volume was decreased and the temperature was increased? (assume that the moles are held constant.) A) The pressure will increase B) The pressure will decrease C) The pressure will stay the same D) There is not enough information to determine Which the following molecules has a bent geometry? A) CO_2 B) SO_2 C) NH_3 D) CO_3^2- E) None of the above What is the geometry of CBr_4? Is it polar or non-polar? A) Trigonal pyramidal, polar B) Trigonal pyramidal, non-polar C) Tetrahedral, non - polar D) Tetrahedral, non-polar E) Square planar, non-polar What is the electron configuration for As? A) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^3 B) 1s^2 1p^6 2s^2 2P^6 3s^2 3p^6 4s^2 3d^10 4p^3 C) 1s^2 2s^6 2p^2 3s^2 3p^6 4s^2 3d^10 4p^3 D) 1s^2 2s^2 3s^2 4s^2 3d^10 4p^3 E) None of the above

Explanation / Answer

Q12

central atom is Oxygen

H-O-H

Oxygen has = 6 electrnos in its valence, 2 are used for nbonding, 4 are left

lone pairs = 4/2 = 2 lone pairs

Q13

If Volume decreases, and Temperature remains the same, then

P1V1 = P2V2

If V decreases, P must increase

Q14

bent geometry:}

CO2 = linear

SO2 = bent, similar to water, i.e. H2O

NH3 = pyramidal

CO3-2 = not bent

choose SO2

Q15

CBr4 = must be tetrahedral, since the cabron is sp3 hybridized

choose D

Q16

As has the next electron (condensed) configuration

[Ar] 3d10 4s2 4p3

therefore,

B = cant be since 1p6 cant exist

C = cant be since S fills with 2 electrnos

then, choose A

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.