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Zarrin [17]
2 years ago
15

Choose the correct statement about an atomic nucleus, compared to an atom as a whole. Choose the correct statement about an atom

ic nucleus, compared to an atom as a whole. The nucleus is very tiny but has most of the mass. The nucleus is very tiny and has very little mass. The nucleus is quite large and has most of the mass.
Chemistry
1 answer:
nikitadnepr [17]2 years ago
7 0

<u>Answer:</u> The correct statement is the nucleus is very tiny but has most of the mass.

<u>Explanation:</u>

There are three sub-atomic particles in an atom:

  • <u>Protons:</u> They are positively charged species present in the nucleus of an atom.
  • <u>Electrons:</u> They are positively charged species present around the nucleus of an atom.
  • <u>Neutrons:</u> They are neutral species present in the nucleus of an atom.

Nucleus is defined as the positively charged center of the atom consisting of protons and neutrons. All the mass of atom is contained in the nucleus.

From Rutherford's Gold foil experiment, the nucleus of an atom occupies a very little place.

Hence, the correct statement is the nucleus is very tiny but has most of the mass.

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5 0
3 years ago
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(a) Given that Ka for acetic acid is 1.8 X 10^-5 and that for hypochlorous acid is 3.0 X 10^-8, which is the stronger acid? (b)
Gala2k [10]

Answer:

HOAc is stronger acid than HClO

ClO⁻ is stronger conjugate base than OAc⁻

Kb(OAc⁻) = 5.5 x 10⁻¹⁰

Kb(ClO⁻) = 3.3 x 10⁻⁷

Explanation:

Assume 0.10M HOAc => H⁺ + OAc⁻  with Ka = 1.8 x 10⁻⁵

=> [H⁺] = √Ka·[Acid] =√(1.8 x 10⁻⁵)(0.10) M = 1.3 x 10⁻³M H⁺

Assume 0.10M HClO => H⁺ + ClO⁻ with Ka = 3 x 10⁻⁸

=> [H⁺] = √(3 x 10⁻⁸)(0.10)M = 5.47 x 10⁻⁵M H⁺

HOAc delivers more H⁺ than HClO and is more acidic.

Kb = Kw/Ka, Kw = 1 x 10⁻¹⁴

Kb(OAc⁻) = 5.5 x 10⁻¹⁰

Kb(ClO⁻) = 3.3 x 10⁻⁷

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3 years ago
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Answer:

False

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6 0
3 years ago
The condition of acidosis can also cause ____________ because the higher H concentration diffuses to the ICF, pushing K towards
Rina8888 [55]

Answer:

Hyperkalemia

Explanation:

The condition of acidosis can also cause Hyperkalemia because the higher H concentration diffuses to the ICF, pushing K towards the ECF.

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