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Anna007 [38]
4 years ago
15

There is a "short-cut" to determining the number of valence electrons. how can you determine the number of valence electrons by

just looking at the periodic table?
Chemistry
1 answer:
Illusion [34]4 years ago
4 0
The number of valence electrons of elements in a group is the same as the group number
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What is the equilibrium constant of pure water at 25C?
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Answer:

In pure water, at 25C, the [H3O+] and [OH-] ion concentrations are 1.0 x 10-7 M. The value of Kw at 25C is therefore 1.0 x 10-14. Although Kw is defined in terms of the dissociation of water, this equilibrium constant expression is equally valid for solutions of acids and bases dissolved in water.

Explanation:

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(07.07 MC) Consider the following equilibrium reaction having gaseous reactants and products. 4HCl + O2 ⇌ 2H2O + Cl2 Which of th
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3 years ago
How long would it take a current of 10A to deposit 6.36g of copper during the electrolysis of copper (ll) tetraoxosulphate VI so
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It take 0.54 hours to deposit 6.36g of copper

<h3>Further explanation</h3>

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W = e.i.t / 96500

\tt \large {\boxed {\bold {W \: = \: \dfrac {e \times  i \: x \: t} {96500}}}}

e = equivalent = Ar / valence

i = current, A

t = time, s

W=6.36 g

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\tt t=\dfrac{W\times 96500}{e.i}\\\\t=\dfrac{6.36\times 96500}{31.75\times 10 }\\\\t=1933.04~s\approx 0.54~hours

8 0
3 years ago
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