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3 years ago

Network solids are hard and have high melting points. Which statement explains these properties?

Chemistry

2 answers:

m_a_m_a [10]3 years ago

6 0

Answer:

The atoms are held together with large networks of covalent bonds.

Explanation:

Liono4ka [1.6K]3 years ago

3 0

Answer:

The correct answer is A the atoms are held together with large network of metallic bonds.

Explanation:

Metallic bond is a specific type of bond that is formed by interaction of many detached negatively charged electron with positively charged ions or cations,which provides a definite structure to the substance.

Due to the low ionization energy the electrons present in the outerorbital can be de localized throughout the metal.The de localized electrons able to freely move around the crystalline structure.

There is a presence of strong interaction between negatively charged electrons and positively charged ions which is responsible for high melting and boiling point of metals.

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Calculate the heat energy released when 24.1g of liquid Mercury at 25 degrees celsius is converted to solid? mercury.; Steve I g

harkovskaia [24]

Molar mass Hg = 200.5920g/mol 
Hg = 24.1/200.5920 = 0.120mol 

234.32K liquid to 25C (298.15K) liquid 
h = (0.120)(28.0)(298.15 - 234.32) = 214.4688 J 

234.32K liquid to 234.32K solid 
h = (0.120)(2.29) = 0.2748 kj 

total heat = 0.2145 + 0.2748 = 0.4893 kJ

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3 years ago

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scoray [572]

Add all the carbon atoms (3) then add hydrogen atoms (8)
C3H8

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Mars2501 [29]

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4 0

3 years ago

Name the three functional groups in the compound pictured.

oksian1 [2.3K]

The three functional groups shown in the image are: ester, alkoxy and carboxyl.

<h3>What are functional groups?</h3>

Chemical properties depend on its structure. Certain properties, too, are attributable to an atomic group ordered in a particular way, apart from the whole of the molecule. Such groups of atoms that determine the chemical properties of compounds are called functional groups.

The functional group can be on the primary, secondary, or tertiary carbon.

Functional groups are often found on molecules of biological importance.

Functional groups are usually formed by a set of elements such as carbon, hydrogen and oxygen, attached to the hydrocarbon chain, giving the molecule characteristics. Can also include other elements such as sulfur or nitrogen.

Molecules can have more than one functional group on it, having different combinations on it that can affect properties of the molecule such as solubility, structure, or reactivity.

Carboxyl groups are usually seen in amino acids, fatty acids and other molecules since it is a fairly common functional group.

Therefore, we can confirm that the three functional groups shown in the image are: ester, alkoxy and carboxyl.

To learn more about functional groups visit: brainly.com/question/14618322?referrer=searchResults

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8 0

2 years ago

Nonmetallic elements form ions by _____ valence electrons to complete their outer shell.

Brums [2.3K]

Answer: Non-metals form ions when they gain electrons.

Explanation:

An ion is formed when an atom looses or gains electron.

When an atom looses electrons, it will form a positive ion known as cation.
When an atom gains electrons, it will form a negative ion known as anion.

Metals are the elements which have a tendency to loose electrons and thus they form cations. Example: Sodium will loose 1 electron to form $Na^+$ ion.

Non-metals are the elements which have a tendency to gain electrons and thus they form anions. Example: Fluorine will gain 1 electron to form $F^-$ ion.

Hence, non-metals form ions when they gain electrons.

7 0

4 years ago