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Blababa [14]
3 years ago
14

Which of the following best describes solids?

Chemistry
2 answers:
horrorfan [7]3 years ago
6 0

Answer: Option (D) is the correct answer.

Explanation:

Solids are the substances whose molecules are closely packed together due strong inter molecular forces between them. This causes the solid to have a fixed shape and volume.

Whereas density is mass divided by per unit volume.

Mathematically,         Density = \frac{mass}{volume}

Since, density is proportional to mass. So, more is the mass that is, more is the number of molecules held together by strong forces more will be its density.

Therefore, we can conclude that the statement solids are high in density and incompressible, best describes solids.

Angelina_Jolie [31]3 years ago
3 0
In my opinion I would pick D. 

Multiple answers could be chosen, just due to the fact that a solid is nothing more than just an object that cannot change it's physical shape into an object; just as water would. a solid can have a low density; such as paper, plastics, or even just a piece of wood. 

But think of a block of ice. You can break it, and crush it. It cannot be formed into any other shape. If you did break it, it only would make more ice fragments. And it's next phase is a liquid; if it were to be melted.
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Answer:

The correct answer is option E.

Explanation:

Structures for the reactants and products are given in an aimage ;

Number of double bonds in oxygen gas molecule = 1

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Number of single bond in in nitro dioxide gas molecule = 1

Number of triple bonds in nitrogen gas molecule = 1

N_2+2O_2\rightarrow 2NO_2,\Delta H=?

\Delta H=[2 mol\times \Delta H_{f,NO_2}]-[1 mol\times \Delta H_{f,N_2}-2 mol\times \Delta H_{f,O_2}]

\Delta H_{f,NO_2}=33.18 kJ/mol

\Delta H_{f,N_2}=0 (pure element)

\Delta H_{f,O_2}=0 (pure element )

\Delta H=2 mol\times 33.18 kJ/mol=66.36kJ=15.86 kcal

The enthalpy of the given reaction is 15.86 kcal.

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3 years ago
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Explanation:

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Answer:

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Explanation:

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