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MMLU-Pro / 3639 / Nelson, et al. (Science 238, 1670 (1987)) examined several weakly bound…

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question

Nelson, et al. (Science 238, 1670 (1987)) examined several weakly bound gas-phase complexes of ammonia in search of examples in which the H\mathrm{H} atoms in NH3\mathrm{NH}_3 formed hydrogen bonds, but found none. For example, they found that the complex of NH3\mathrm{NH}_3 and CO2\mathrm{CO}_2 has the carbon atom nearest the nitrogen (299 pm away): the CO2\mathrm{CO}_2 molecule is at right angles to the C−N\mathrm{C}-\mathrm{N} 'bond', and the H\mathrm{H} atoms of NH3\mathrm{NH}_3 are pointing away from the CO2\mathrm{CO}_2. The magnitude of the permanent dipole moment of this complex is reported as 1.77D1.77 \mathrm{D}. If the N\mathrm{N} and C\mathrm{C} atoms are the centres of the negative and positive charge distributions, respectively, what is the magnitude of those partial charges (as multiples of ee )?
Plain-text mathematical notation (without MathML)
Nelson, et al. (Science 238, 1670 (1987)) examined several weakly bound gas-phase complexes of ammonia in search of examples in which the H atoms in NH₃ formed hydrogen bonds, but found none. For example, they found that the complex of NH₃ and CO₂ has the carbon atom nearest the nitrogen (299 pm away): the CO₂ molecule is at right angles to the C−N 'bond', and the H atoms of NH₃ are pointing away from the CO₂. The magnitude of the permanent dipole moment of this complex is reported as 1.77D. If the N and C atoms are the centres of the negative and positive charge distributions, respectively, what is the magnitude of those partial charges (as multiples of e )?
Original LaTeX notation
Nelson, et al. (Science 238, 1670 (1987)) examined several weakly bound gas-phase complexes of ammonia in search of examples in which the $\mathrm{H}$ atoms in $\mathrm{NH}_3$ formed hydrogen bonds, but found none. For example, they found that the complex of $\mathrm{NH}_3$ and $\mathrm{CO}_2$ has the carbon atom nearest the nitrogen (299 pm away): the $\mathrm{CO}_2$ molecule is at right angles to the $\mathrm{C}-\mathrm{N}$ 'bond', and the $\mathrm{H}$ atoms of $\mathrm{NH}_3$ are pointing away from the $\mathrm{CO}_2$. The magnitude of the permanent dipole moment of this complex is reported as $1.77 \mathrm{D}$. If the $\mathrm{N}$ and $\mathrm{C}$ atoms are the centres of the negative and positive charge distributions, respectively, what is the magnitude of those partial charges (as multiples of $e$ )?

category

chemistry

options

  1. 0.150
  2. 0.123
  3. 0.135
  4. 0.098
  5. 0.157
  6. 0.091
  7. 0.112
  8. 0.176
  9. 0.204
  10. 0.085

src

scibench-matter

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Source and history

upstream_id / Original problem ID
3639
task_id
5b6d2139-34de-5365-8d32-98906727e2ae
task_key
default--test--3639
task_revision_id
1
config / split
default / test

Official source

initial import