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Serggg [28]
3 years ago
15

Which pair of elements will form an ionic bond?

Chemistry
1 answer:
Sergeu [11.5K]3 years ago
4 0

I believe that the answer is A.

The combination of potassium (K) and oxygen (O2) produces K2O (potassium oxide). The balanced equation is 2K + O2 ==> K2O.

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At 1000 K, a sample of pure NO2 gas decomposes. 2 NO2(g) equilibrium reaction arrow 2 NO(g) + O2(g) The equilibrium constant KP
kirill115 [55]

<u>Answer:</u> The pressure of NO and NO_2 in the mixture is 0.58 atm and 0.024 atm respectively.

<u>Explanation:</u>

We are given:

Equilibrium partial pressure of O_2 = 0.29 atm

For the given chemical equation:

                   2NO_2(g)\rightleftharpoons 2NO(g)+O_2(g)

Initial:              a

At eqllm:        a-2x          2x          x

Calculating for the value of 'x'

\Rightarrow x=0.29

Equilibrium partial pressure of NO = 2x = 2(0.29) = 0.58 atm

Equilibrium partial pressure of NO_2 = a - 2x = a - 2(0.29) = a - 0.58

The expression of K_p for above equation follows:

K_p=\frac{p_{O_2}\times (p_{NO})^2}{(p_{NO_2})^2}

We are given:

K_p=158

Putting values in above expression, we get:

158=\frac{0.29\times (0.58)^2}{(a-0.58)^2}\\\\a=0.555,0.604

Neglecting the value of a = 0.555 because it cannot be less than the equilibrium concentration.

So, a=0.604

Equilibrium partial pressure of NO_2 = (a - 0.58) = (0.604 - 0.58) = 0.024 atm

Hence, the pressure of NO and NO_2 in the mixture is 0.58 atm and 0.024 atm respectively.

4 0
3 years ago
If an atom has an atomic mass of 24 and its atomic number is 11, how many protons will
raketka [301]
11 electrons
11 protons and
13 neutrons
3 0
3 years ago
How many bonds can sodium form
Tresset [83]

it exists as atom or ion but not as sodium molecule. So there is no any sodium sodium bonding between two sodium atoms. Sodium combines with other element or group to form compounds of sodium like sodium chloride ,sodium carbonate ,sodium sulphate etc. Sodium has symbol Na and its atomic no. is 11 .

4 0
3 years ago
Read 2 more answers
a chemist want to make a solution of 3.4M HCl there are tow solutions of HCl that he can find on the shelf. one has a concentrat
steposvetlana [31]

Answer:

The most concentrated one, 6.0 M.

Explanation:

A simple and reliable way to produce a solution of HCl (or anything else, for that matter) is to use a more concentrated solution and dilute it.

In this case the chemist could take a portion of the 6.0 M solution and dilute it by adding water, until the concentration is 3.4 M.

Such a process would not be possible with the 2.0 N (which is the same as 2.0 M for HCl) solution.

7 0
3 years ago
A pure substance contains only one type of particle.?
Alenkinab [10]

Answer:

element

A pure substance is matter that is uniform throughout and has consistent properties. All matter is made up of very small particles called atoms. Atoms are the building blocks of all matter. When a substance contains only one type of atom, it is called an element.

4 0
3 years ago
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