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svetoff [14.1K]
3 years ago
11

In what way are elements in the same column of the periodic table

Chemistry
2 answers:
andrew11 [14]3 years ago
4 0
You can see wich group by the last out shell. Group 1 has 1 electron in the outershell
12345 [234]3 years ago
3 0
The periodic table<span> also has a special name for its vertical </span>columns<span>. Each </span>column<span> is called a group. The </span>elements<span> in each group have the </span>same<span> number of electrons in the outer orbital. Those outer electrons are also called valence electrons.

Hope this helps. :)</span>
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Which of the following is not an example of a polymer?
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2NOCl(g) ↔ 2NO(g) + Cl2(g) with K = 1.6 x10–5. In an experiment, 1.00 mole of pure NOCl and 1.00 mole of pure Cl2 are placed in
poizon [28]

Answer: 3.8\times 10^{-3}M

Explanation:

Moles of  NOCl = 1 mole

Moles of  Cl_2 = 1 mole

Volume of solution = 1 L

Initial concentration of NOCl = 1 M

Initial concentration of Cl_2 = 1 M

The given balanced equilibrium reaction is,

                  2NOCl(g)\rightleftharpoons 2NO(g)+Cl_2(g)

Initial conc.          1 M                      0M          1 M

At eqm. conc.     (1-2x) M              (2x) M       (1+x) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[NO]^2[Cl_2]}{[NOCl]^2}

The K_c= 1.6\times 10^{-5}}

Now put all the given values in this expression, we get :

{1.6\times 10^{-5}}=\frac{(2x)^2\times (1+x)}{(1-2x)^2}

By solving the term 'x', we get :

x=0.0019

Concentration of NO at equilibrium= (2x) M  =  2\times 0.0019=3.8\times 10^{-3}M

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I I'm pretty sure it's B I hope this helps

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