Using the Polymers: A Property Database provide the following

Chemistry

1 answer:

Novosadov [1.4K]2 years ago

4 0

Polyethene is a polymer composed of repeating units of the monomer ethene.

The properties of polyethene are as follows:

density- ranges 0.857 g/cm3 to 0.975 g/cm3.
specific heat capacity is 1.9 kJ/kg.
melting temperature is approximately 110 °C.

<h3>What are polymers?</h3>

Polymers are large macromolecules consisting of long repeating chains of smaller molecules known as monomers.

An example of a polymer is polyethene composed of repeating units of the monomer ethene.

The density of polyethylene ranges 0.857 g/cm3 to 0.975 g/cm3.

The specific heat capacity of polyethene is 1.9 kJ/kg.

The melting temperature of polyethene is approximately 110 °C.

Learn more about polyethene at: brainly.com/question/165779

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Question 9 (1 point)

Juliette [100K]

Noble gases

Explanation:

Electronic configuration 1s² 2s² 2p⁶

The element belongs to the group of the noble gases.

The noble gases have complete outer shell configuration of their atoms.
we can infer that the configuration above is for an element in the p-block because the last sub-level filled is the p-orbital.
The elements therefore belongs to the p-block
The block is from group 111A to O
Only the halogens and noble gases fits this picture from the option.
The outer most p-subshell have three orbitals requiring 6 electrons to fill them up.
This makes a complete and stable configuration.
The highest energy level of 2 is also made up of 8 electrons, an octet.
This is why we can conclude that they are noble gases.

Learn more:

Noble gas brainly.com/question/1781595

#learnwithBrainly

7 0

3 years ago

Need help asap!

Scilla [17]

Answer: 1. C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur

2. B) $NH_3$

3. B) Fluorine

Explanation:

1. A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms.

Electronegativity difference = electronegativity of sulphur- electronegativity of silicon = 2.5 -1.8 = 0.7

Thus as electronegativity difference is less than 1.7 , the cond is polar covalent and as electronegativity of sulphur is more , the electrons will be more towards sulphur.

2. A molecular compound is usually composed of two or more nonmetal elements. Example: $NH_3$

Ionic compound is formed by the transfer of electrons from metals to non metals. Example: $Mg_3N_2$ , $AlCl_3$ and $LiBr$

3. For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here K is having an oxidation state of +1 and as the compound formed is KZ, the oxidation state of non metallic element Z should be -1. Thus the element Z is flourine which exists as diatomic gas $F_2$