An electron jumps to a more distant orbit when an atom: Group of answer choices emits light absorbs light

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Answer 1

An electron jumps to a more distant orbit when an atom absorbs light. An atom is composed of a nucleus and electrons. The electrons in the atom revolve around the nucleus in orbits. When the electrons gain energy, they jump from one orbit to another distant orbit. This is known as the excitation of an electron. When the electron is excited, it gains potential energy that is equal to the energy difference between the higher and lower levels.

The excitation energy can be supplied by light, heat, or chemical reactions. However, we will discuss the excitation of an electron due to light in this answer. When an atom absorbs light, its electrons absorb the energy of the light wave. The energy of the wave corresponds to the difference in the potential energy of the electron between the initial and final orbits. If the absorbed energy is equal to or greater than the excitation energy required for the electron to jump to a higher energy level, then the electron jumps to the more distant orbit.

The atom then becomes unstable, and the electron returns to the lower energy state by releasing the extra energy in the form of light photons. This process is known as emission. The frequency of the emitted light corresponds to the difference in energy between the two energy levels. The larger the energy difference, the higher the frequency and the shorter the wavelength of the emitted light. The opposite process of absorption is emission, where an electron jumps down from a higher energy level to a lower energy level and emits light in the process.

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Related Questions

What are the limitations of litmus paper and phenolphthalein indicators? name two other indicators that can be used that do not have such limitations. source stylesnormal

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Litmus paper and phenolphthalein indicators have pH range limitations and lack precision. Universal indicator and bromothymol blue are alternative indicators that offer a broader range and greater accuracy.

Litmus paper is a pH indicator that changes color in the presence of an acid or a base. However, it can only indicate whether a substance is acidic (turns red) or basic (turns blue), without providing an accurate pH value. Phenolphthalein, on the other hand, is colorless in acidic solutions and pink in basic solutions, but it has a limited pH range of 8.2 to 10.0.

To overcome these limitations, the universal indicator is commonly used. It is a mixture of several indicators that produces a wide range of colors depending on the pH of the solution. The resulting color can be compared to a color chart to determine the approximate pH value of the substance being tested. This allows for a more precise measurement of pH compared to litmus paper or phenolphthalein.

Another alternative indicator is bromothymol blue. It changes color depending on the pH of the solution, from yellow in acidic solutions to blue in basic solutions. Bromothymol blue has a pH range of 6.0 to 7.6, which makes it suitable for a broader range of pH measurements compared to phenolphthalein.

These alternative indicators, universal indicator and bromothymol blue, provide a wider pH range and more precise measurements compared to litmus paper and phenolphthalein. They offer greater versatility and accuracy in determining the acidity or basicity of a solution.

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The standard molar enthalpy change for this reaction is -1.3 MJ. What is the enthalpy change when 6 moles of octane are combusted

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The enthalpy change when 6 moles of octane are combusted is -7.8 MJ. This value is obtained by multiplying the standard molar enthalpy change (-1.3 MJ/mol) by the number of moles of octane combusted.

The balanced combustion equation for octane (C8H18) is:

C8H18 + 12.5O2 → 8CO2 + 9H2O

According to the balanced equation, the stoichiometric coefficient of octane is 1, which means that the enthalpy change for the combustion of 1 mole of octane is -1.3 MJ.

To find the enthalpy change when 6 moles of octane are combusted, we can multiply the standard molar enthalpy change by the number of moles of octane:

Enthalpy change = -1.3 MJ/mol * 6 mol

Enthalpy change = -7.8 MJ

Therefore, when 6 moles of octane are combusted, the enthalpy change is -7.8 MJ.

The enthalpy change when 6 moles of octane are combusted is -7.8 MJ. This value is obtained by multiplying the standard molar enthalpy change (-1.3 MJ/mol) by the number of moles of octane combusted. The negative sign indicates that the combustion process is exothermic, releasing energy in the form of heat.

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Consider the reaction H3PO4 + 3 NaOH â Na3PO4 + 3 H2O How much Na3PO4 can be prepared by the reaction of 3.92 g of H3PO4 with an excess of NaOH? Answer in units of g.

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The reaction H₃PO₄ + 3 NaOH → Na₃PO₄ + 3 H₂O . 6.46 grams of Na₃PO₄ can be prepared by the reaction of 3.92 grams of H₃PO₄ with an excess of NaOH.

To determine the amount of Na₃PO₄ that can be prepared, we need to consider the balanced chemical equation and the stoichiometric ratio between H₃PO₄ and Na₃PO₄.

The balanced equation is:

H₃PO₄ + 3 NaOH → Na₃PO₄ + 3 H₂O

From the equation, we can see that 1 mole of H₃PO₄ reacts to produce 1 mole of Na₃PO₄. Therefore, the stoichiometric ratio is 1:1.

First, let's calculate the number of moles of H₃PO₄ given its mass:

Mass of H₃PO₄ = 3.92 g

Molar mass of H₃PO₄ = 97.994 g/mol

Moles of H₃PO₄ = Mass / Molar mass = 3.92 g / 97.994 g/mol

Since the stoichiometric ratio is 1:1, the moles of Na₃PO₄ produced will be equal to the moles of H₃PO₄.

Moles of Na₃PO₄ = Moles of H₃PO₄ = 3.92 g / 97.994 g/mol

Now, let's calculate the mass of Na₃PO₄ using the molar mass of Na₃PO₄:

Molar mass of Na₃PO₄ = 163.94 g/mol

Mass of Na₃PO₄ = Moles of Na₃PO₄ * Molar mass of Na₃PO₄

By substituting the calculated values into the equation, we can find the mass of Na₃PO₄ that can be prepared:

Mass of Na₃PO₄ = (3.92 g / 97.994 g/mol) * 163.94 g/mol

Calculating the result:

Mass of Na₃PO₄ ≈ 6.46 g

Therefore, approximately 6.46 grams of Na₃PO₄ can be prepared by the reaction of 3.92 grams of H₃PO₄ with an excess of NaOH.

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