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Alexus [3.1K]
3 years ago
7

Which of the following is a possible ground-state electron configuration?

Chemistry
2 answers:
Kobotan [32]3 years ago
8 0
<span>A. [Xe] 6s24f145d106p2

Is the correct answer</span>
Mamont248 [21]3 years ago
3 0

Answer : Option A) [Xe] 6s^{2}4f^{14}5d^{10}6p^{2}

Explanation : Lead is the element which is represented in the ground state electron configuration as [Xe] 6s^{2}4f^{14}5d^{10}6p^{2}.

It has only 2 + 14 + 10 + 2 = 28 electrons and protons more than that of Xenon.

Xenon has atomic number as 54, now adding 28 protons in its atom will make it 82 which the atomic number of Lead.

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Write the overall, balanced molecular equation and indicate which element is oxidized and which is reduced for the following rea
galina1969 [7]

Answer:

Cd(s) + AgNO₃(aq)  → Cd(NO₃)₂ (aq) + Ag(s)

Oxidized: Cd

Reduced: Ag

Explanation:

Cd(s) + AgNO₃(aq)  → Cd(NO₃)₂ (aq) + Ag(s)

Cd → Cd²⁺  +  2e⁻      Half reaction oxidation

1e⁻ + Ag⁺ → Ag           Half reaction reduction

Ag changed oxidation number from +1 to 0

Cd changed oxidation number from 0 to +2

Let's ballance the electrons

( Cd → Cd²⁺  +  2e⁻ ) .1

( 1e⁻ + Ag⁺ → Ag ) .2

Cd + 2e⁻ + 2Ag⁺  → 2Ag +  Cd²⁺  +  2e⁻

Finally the ballance equation is:

Cd(s) + 2AgNO₃(aq)  → Cd(NO₃)₂ (aq) + 2Ag(s)

4 0
3 years ago
What is capillary action? Describe how capillary action shown by water is useful for plants and animals on Earth.
Shtirlitz [24]

Answer:

Look Below

Explanation:

Capillary action is adhesion of water. In plants, capillary action allows water to move from the roots to leaves. In animals, capillary action plays a role in respiration where oxygen-poor blood oxygenates in the capillaries.

4 0
3 years ago
Read 2 more answers
T/F
kifflom [539]
True. Nuclear fusion of hydrogen to form helium occurs naturallyin the sun and other stars. It takes place only at extremely high temperatures.
8 0
3 years ago
Explain why the boiling point of H2S with relative molecular mass 34 is lower than that of H2O with relative molecular mass 18​
Levart [38]

Answer and Explanation:

In H2O molecules, due to formation of intermolecular hydrogen bonds, there is molecular association. Large amount of energy is required to break these intermolecular hydrogen bonds. Intermolecular hydrogen bonding is not possible in H2S. Hence, its boiling point is lower and is a gas.

4 0
3 years ago
Calculate the heat energy required to melt 4kg of ice when the specific latent heat of fusion of water is 334,000 J/kg.
Setler79 [48]

Taking into account the definition of calorimetry and latent heat, the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 \frac{J}{kg} is 1,336 kJ.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

<h3>Latent heat</h3>

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

<h3>Heat energy required to melt ice</h3>

In this case, you know:

  • m= 4 kg
  • L= specific latent heat of fusion of water= 334,000 \frac{J}{kg}

Replacing in the expression for latent heat:

Q = 4 kg× 334,000 \frac{J}{kg}

Solving:

<u><em>Q= 1,336,000 J= 1,336 kJ </em></u>(being 1,000 J= 1 kJ)

Finally, the correct answer is the first option: the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 \frac{J}{kg} is 1,336 kJ.

Learn more about calorimetry:

<u>brainly.com/question/14057615?referrer=searchResults</u>

<u>brainly.com/question/24988785?referrer=searchResults</u>

<u>brainly.com/question/21315372?referrer=searchResults</u>

<u>brainly.com/question/13959344?referrer=searchResults</u>

<u>brainly.com/question/14309811?referrer=searchResults</u>

<u>brainly.com/question/23578297?referrer=searchResults</u>

7 0
2 years ago
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