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3 years ago

7

Calcium chloride has a melting point of 772°C, and water has a boiling point of 100°C. Which statement is true for calcium chlor

ide and water?

1 answer:

nekit [7.7K]3 years ago

4 0

The difference is due to the fact that calcium chloride has stronger intermolecular forces than water.

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A student writes the following explanation of how one type of compound is formed.

enyata [817]

Answer:

<u>Polymerization process(Addition)</u>

Explanation:

<u>Polymerization </u>: The process in which small units called monomers combine to produce large mass compound is called polymerization reaction.These large masses are also called macromolecules.

The formation of polymers can occur by addition or condensation process .

<u><em>Addition</em></u> : In addition reaction small units add to previous units

<em><u>Condensation</u></em> : In condensation , a small molecule like water , carbon dioxide get eliminated when the unit attach to previous unit.

Some natural polymers are Proteins , carbohydrates , lipids , cellulose.

Polythene = addition polymerisation also known as Chain growth polymerisation.

$nCH_{2}=CH_{2}\rightarrow (-CH_{2}CH_{2}-)_{n}$

This occur in three steps:

1. Chain Initiation : The start of the reaction occurs with the radical. These are generated from some organic peroxide and have general representation:

$R^{.}$

2 . Chain Growth = When the small units goes on adding to the previous units , Chain length increases and this is called chain growth.

3. Chain Termination = The chain continues to grow more and more until not forced to stop. This termination of chain growth is called chain termination

6 0

3 years ago

What is the mass (in grams) of 9.09x10^24 molecules of methanol (CH3OH)?

zloy xaker [14]

The amount of a substance can be converted into grams of that substance by using the molar mass. It is a physical property of a substance which describes the mass per mole of the substance. The molar mass of CH3OH is 32.04 g/ mol. Multiplying the given amount of CH3OH with the molar mass will yield to the mass of the substance.

<span>9.09x10^24 molecules CH3OH ( 1 mol / 6.022x10^23 molecules) (32.04 g/mol) = 483.63 g CH3OH

Dividing the molar mass of N2O which is 44.08 g/mol to the given amount will yield to the number of moles.

0.183 g N2O / 44.08 g/ mol =0.0042 mol N2O</span>

8 0

2 years ago

The ease with which a raw material can be molded , flattened , or bent is known as its ?

Leya [2.2K]

A. Malleability

Ductility is being able to be drawn into wires
Elasticity is being able to resist stress
Resilience is being able to spring back into shape (kind of like elasticity)

6 0

3 years ago

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A radio wave travels 186,000 miles per second. How many kilometers will the wave travel in one microsecond? (1 mile = 1.61 km)

Komok [63]

1) 1 second = 1000000 microseconds

2) 186000 / 1.61 = 115527.9503 Km

3) We use the equation:
Speed = distance / time

4) rearrange for distance by multiplying both sides by time to get;

Distance = speed x time

5) plug in the values:

Distance = 115527.9503 x 0.000001
= 0.1155279503 Km

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2 years ago

Lisa studied the role of the stamen and stigma in the formation of seeds in flowering plants. She removed all the stamen from on

gulaghasi [49]

The Answer is Tweezers!

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3 years ago

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