40Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10J•s.In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Whichobjects would act like everyday objects, and be adequately described by classical mechanics?objectquantum or classical?classicalAn airplane with a mass of 1.98 x 104 kg, 13.0 m long,moving at 2200. km/h.quantumclassicalA paper airplane with a mass of 5.6 g, 155. mm long,moving at 3.7 m/s.quantumclassicalAn alpha particle with a mass of 6.6 x 10-27 kg, 8.0 x 10"15m wide, moving at 17. km/s.quantumclassicalAn eyelash mite with a mass of 8.6 µg, 385 µm wide,moving at 47. µm/s.quantumO OO O One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chlorideanions in solution will combine with the silver cations to produce bright white silver chloride precipitate.Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with nickel(II) chloride, which would react with silver nitratesolution like this:NiCl,(aq) + 2 AgNO3(aq) -2 AgCl(s) + Ni(NO,), (aq)oloThe chemist adds 73.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She findsshe has collected 3.0 mg of silver chloride.ArCalculate the concentration of nickel(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits.mgx10

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-40 Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10 J's. In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics? object quantum or classical? classical An airplane with a mass of 1.98 x 104 kg, 13.0 m long, moving at 2200. km/h. quantum O classical A paper airplane with moving at 3.7 m/s. mass of 5.6 g, 155. mm long, O quantum classical An alpha particle with a mass of 6.6 x 10-27 kg, 8.0 x 10 15 m wide, moving at 17. km/s. quantum O classical An eyelash mite with a mass of 8.6 pg, 385 µm wide, moving at 47. pm/s. O quantum

-40 Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10 J's. In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics? object quantum or classical? classical An airplane with a mass of 1.98 x 104 kg, 13.0 m long, moving at 2200. km/h. quantum O classical A paper airplane with moving at 3.7 m/s. mass of 5.6 g, 155. mm long, O quantum classical An alpha particle with a mass of 6.6 x 10-27 kg, 8.0 x 10 15 m wide, moving at 17. km/s. quantum O classical An eyelash mite with a mass of 8.6 pg, 385 µm wide, moving at 47. pm/s. O quantum

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

40
Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10
J•s.
In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which
objects would act like everyday objects, and be adequately described by classical mechanics?
object
quantum or classical?
classical
An airplane with a mass of 1.98 x 104 kg, 13.0 m long,
moving at 2200. km/h.
quantum
classical
A paper airplane with a mass of 5.6 g, 155. mm long,
moving at 3.7 m/s.
quantum
classical
An alpha particle with a mass of 6.6 x 10-27 kg, 8.0 x 10"
15
m wide, moving at 17. km/s.
quantum
classical
An eyelash mite with a mass of 8.6 µg, 385 µm wide,
moving at 47. µm/s.
quantum
O O
O O

One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride
anions in solution will combine with the silver cations to produce bright white silver chloride precipitate.
Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with nickel(II) chloride, which would react with silver nitrate
solution like this:
NiCl,(aq) + 2 AgNO3(aq) -
2 AgCl(s) + Ni(NO,), (aq)
olo
The chemist adds 73.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds
she has collected 3.0 mg of silver chloride.
Ar
Calculate the concentration of nickel(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits.
mg
x10

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