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Gekata [30.6K]
3 years ago
8

The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i

f energy is released during the process. Using the electron configuration of the atom or ion undergoing the addition of an electron, predict whether the electron affinity will be positive or negative for the following reactions, and classify them accordingly.
Na(g)+ 1e^- → Na^-(g)
Mg(g)+1e^- → Mg^-(g)
Br(g)+ 1e^- → Br^-(g)
Chemistry
1 answer:
julsineya [31]3 years ago
5 0

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

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<h3>A. Balanced equation </h3>

The balanced equation for the reaction between acetylene gas (C₂H₂) and oxygen gas (O₂) is given below

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<h3>B. How to determine the volume of oxygen </h3>

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Since the reaction occurred at standard temperature and pressure, we can thus say that:

From the balanced equation above,

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2 L of C₂H₂ reacted to produce 4 L of CO₂

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<h3>D. How to determine the volume of water. </h3>

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From the balanced equation above,

2 L of C₂H₂ reacted to produce 2 L of H₂O

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0.7 L of C₂H₂ will also react to produce 0.7 L of H₂O

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brainly.com/question/14735801

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nydimaria [60]

Answer:

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Explanation:

Given parameters:

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    1.87 moles of  NH₄Cl   1.87 x 6.02 x 10²³ = 1.13 x 10²⁴formula units

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