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a_sh-v [17]
3 years ago
10

Ionization energy is the minimum energy required to remove an electron from an atom in its ground state. It depends on the posit

ion of the elements in periodic table. Which of these elements has highest ionization energy? A) B B) C C) F D) Ne
Chemistry
2 answers:
Kay [80]3 years ago
8 0

Answer:

D. Ne

Explanation:

Ne Across a period, increasing nuclear charge outweighs the shielding. So the outermost electrons are held more tightly and ionization energy increases as we go across a period. Ne, being placed at the extreme right end of the second period, has the highest ionization energy among the provided options.

Mrac [35]3 years ago
5 0
Ne(neon) has the highest ionization energy among the elements above.
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1. (8pt) Using dimensional analysis convert 600.0 calories into kilojoules
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Answer:

1. 2.510kJ  

2. Q = 1.5 kJ

Explanation:

Hello there!

In this case, according to the given information for this calorimetry problem, we can proceed as follows:

1. Here, we consider the following equivalence statement for converting from calories to joules and from joules to kilojoules:

1cal=4.184J\\\\1kJ=1000J

Then, we perform the conversion as follows:

600.0cal*\frac{4.184J}{1cal}*\frac{1kJ}{1000J}=2.510kJ

2. Here, we use the general heat equation:

Q=mC(T_2-T_1)

And we plug in the given mass, specific heat and initial and final temperature to obtain:

Q=236g*0.24\frac{J}{g\°C} (34.9\°C-8.5\°C)\\\\Q=1495.3J*\frac{1kJ}{1000J} \\\\Q=1.5kJ

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3 years ago
Which observation indicates that the kinetic-molecular theory has limited use for describing a certain gas? Gas particles are ac
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My answer to the question is "Gas particles are acting like tiny,solid spheres".

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4 years ago
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A model of an ideal gas is shown here. A student designs an experiment to test the impact of increasing the pressure on the syst
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A. As pressure on the gas increases, the volume and temperature will both decrease

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To understand the relation between the strength of an acid or a base and its pKa and pKb values. The degree to which a weak acid
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Answer:

pKa = 3.675

Explanation:

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∴ <em>C</em> X-281 = 0.079 M

∴ pH = 2.40

let X-281 a weak acid ( HA ):

∴ HA ↔ H+ + A-

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mass balance:

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⇒ [HA] = 0.079 - [A-]

charge balance:

⇒ [H+] = [A-] + [OH-]... [OH-] is negligible; it comes from to water

⇒ [H+] = [A-]

∴ pH = - log [H+] = 2.40

⇒ [H+] = 3.981 E-3 M

replacing in Ka:

⇒ Ka = [H+]² / ( 0.079 - [H+] )

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