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Lapatulllka [165]
3 years ago
8

Complete the sentence. Select all that apply. In the vertical columns of the periodic table:

Chemistry
2 answers:
Sever21 [200]3 years ago
3 0
All of them are pretty correct except the last one, can't really give you a definite answer sorry. <span />
IgorC [24]3 years ago
3 0

Answer:  Atomic weight increases from top to bottom and the number of shells increases from top to bottom

Explanation:  As we go down the group that is vertical column, atomic weight increases as atomic number is increasing.

Moreover the number of electrons in the outershell does not increases but the number of shells increases from top to bottom as atomic number are increasing and electrons are increasing thus more number of shells are needed to fill these electrons.

Physical Properties doesnot remain identical as they do changes on going down the groiup.

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In the laboratory, a general chemistry student measured the pH of a 0.486 M aqueous solution of triethanolamine, C6H15O3N to be
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Answer:

Kb = 6.22x10⁻⁷

Explanation:

Triethanolamine, C₆H₁₅O₃N, is in equilibrium with water:

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Also, Kw = [OH⁻] ₓ [H⁺];

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Replacing in Kb formula:

Kb = [5.495x10⁻⁴M] [5.495x10⁻⁴M] / [0.486M-5.495x10⁻⁴M]

<em>Kb = 6.22x10⁻⁷</em>

<em></em>

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