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dusya [7]
3 years ago
11

A(n) _____ refers to two or more atoms held together by covalent bonds.

Chemistry
1 answer:
arlik [135]3 years ago
7 0

Answer: Option (d) is the correct answer.

Explanation:

A covalent bond is defined as the bond formed by sharing of electrons between the two chemically combining atoms.

For example, atomic number of chlorine is 17 and it has 7 valence electrons.

To attain stability it need to gain one more electron.

So, when one chlorine atom chemically combines with another chlorine atom then there occurs sharing of electrons between the two. As a result, there will be sharing of electrons.

A molecule is defined as the specie that contains same type of atoms which are chemically combined together in a fixed ratio by mass.

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How much H2O is produced when 20000 g of C2H2 burns completely? Answer in units of g.
IgorC [24]

Answer:

Explanation:

H  = 1

C = 12

O = 16

Acetylene, HC≡CH = 2+24 = 26

H2O = 2 + 16 = 18

In XS oxygen, one HC≡CH yields one H2O

26 g HC≡CH  ==> 18 g H2O

2000 g HC≡CH ==> 2000*18/26 g H2O =  1384.6154 g H2O

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Ralph's friend invited him to attend a hard rock concert. Ralph did not want to go because he assumed other people who attended
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Speed is the rate of change of position expressed as _____ traveled per unit of time. A. direction B. meter C. displacement D. d
STatiana [176]

Answer:

Distance

Explanation:

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3 years ago
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yanalaym [24]

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3 years ago
When 1 mol of KBr(s) decomposes to its elements, 394 kJ of heat is absorbed. (a) Write a balanced thermochemical equation.
VladimirAG [237]

The balanced thermochemical equation is

KBr ------- K + 1/2 Br2

<h3>What is thermochemical equation? </h3>

A Thermochemical Equation is defined as the balanced stoichiometric chemical equation which includes the enthalpy change, ΔH.

The chemical equation for the decomposition of potassium bromide to its constituent elements bromine ans potassium :

KBr ----- K + Br2

The balanced thermochemical equation of the decomposition of potassium bromide to its constituent elements potassium and bromide as follows

KBr ------- K + 1/2 Br2

As the heat is absorbed in this reaction therefore, heat is positive.

Thus, we concluded that the balanced thermochemical equation is

KBr ------- K + 1/2 Br2

learn more about thermochemical equation:

brainly.com/question/2733624

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