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4 years ago

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

Chemistry

1 answer:

enyata [817]4 years ago

6 0

Answer:

Polymerization process(Addition)

Explanation:

Polymerization : 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 .

Addition : In addition reaction small units add to previous units

Condensation : 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

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In a test of an automobile engine 1.00 L of octane (702 g) is burned, but only 1.84 kg of carbon dioxide is produced. What is th

Reptile [31]

Answer:

The % yield of CO2 is 85.05 %

Explanation:

Step 1: Data given

Mass of octane = 702 grams

Molar mass octane = 114.23 g/mol

Mass CO2 =1.84 kg = 1840 grams

Molar mass of CO2

Step 2: The balanced equation

2C8H18 + 25O2 → 16CO2 + 18H2O

Step 3: Calculate moles of octane

Moles octane = mass octane / molar mass octane

Moles octane = 702.0 grams / 114.23 g/mol

Moles octane = 6.145 moles

Step 4: Calculate moles of CO2

For 2 moles octane we need 25 moles O2 to produce 16 moles CO2 and 18 moles H2O

For 6.145 moles octane we'll have 8*6.145 moles =49.16 moles

Step 5: Calculate mass of CO2

Mass CO2 = moles CO2 * molar mass CO2

Mass CO2 = 49.16 moles * 44.01 g/mol

Mass CO2 = 2163.5 grams

Step 6: Calculate % yield of carbon dioxide

% yield = (actual yield / theoretical yield)*100%

% yield = (1840/2163.5)*100%

% yield = 85.05 %

The % yield of CO2 is 85.05 %

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3 years ago

Which of the following is true about extinction? A. Only one extinction has occurred during the Earth's history. B. Plant specie

ycow [4]

Answer:

C. Extinctions have occurred many times throughout the Earth's history.

Explanation:

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3 years ago

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2. Explain how conduction, convection and radiation all contribute to heating the Earth's

ANTONII [103]

Answer: Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. ... During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction.

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3 years ago

Can acidic oxide react with acids? If not, why?

katrin [286]

Answer:

Explanation:

Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.

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3 years ago

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Define an ideal gas and explain under which conditions you may reasonably approximate a real gas as an ideal gas. Also mention c

TEA [102]

Answer:

High temperature and low pressure

Explanation:

According to the kinetic molecular theory, gases are composed of small particles called molecules which are in constant motion.

At high temperature and low pressure, gas molecules possess high kinetic energy and move at high velocities hence intermolecular interaction is almost none existent and real gases approach the behavior of ideal gases.

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3 years ago