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3 years ago

Which substance is a polymer found in nature? O carpet O cotton O paint O nylon

Chemistry

2 answers:

RideAnS [48]3 years ago

7 0

Answer:

Cotton

Explanation:

Cellulose, another natural polymer, is the main structural component of plants. Most natural polymers are condensation polymers, and in their formation from monomers water is a by-product.

Bad White [126]3 years ago

4 0

Answer:

B. Cotton

Explanation:

A polymer is a macro molecule or gaint molecule which is formed as a chain from many small molecules(which is called as a monomer).

Polymer is a repeating unit of many monomers.

For example

Ethylene or ethane formula is C2H4.

Many ethane molecules under particular temperature and pressure conditions undergo the polymerization process to form polyethene. During this process the double bond breaks and becomes single bond and produces a long chain which we call it as a polymer.

The repeating unit of Cotton polymer is called as Cellubiose which is made up of 2 glucose units.

The number of units which forms the polymer (degree of polymerization) is about 5000 cellubiose units.

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Consider the balanced equation for the following reaction:

Zanzabum

Answer: The amount of carbon dioxide formed in the reaction is 5.663 grams

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of oxygen gas = 8 g

Molar mass of oxygen gas = 32 g/mol

Putting values in equation 1, we get:

$\text{Moles of oxygen gas}=\frac{8g}{32g/mol}=0.25mol$

For the given chemical equation:

$7O_2(g)+2C_2H_6(g)\rightarrow 4CO_2(g)+6H_2O(l)$

By Stoichiometry of the reaction:

7 moles of oxygen gas produces 4 moles of carbon dioxide

So, 0.25 moles of oxygen gas will produce = $\frac{4}{7}\times 0.25=0.143mol$ of carbon dioxide

Now, calculating the mass of carbon dioxide from equation 1, we get:

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 0.143 moles

Putting values in equation 1, we get:

$0.143mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=(0.143mol\times 44g/mol)=6.292g$

To calculate the experimental yield of carbon dioxide, we use the equation:

$\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Percentage yield of carbon dioxide = 90 %

Theoretical yield of carbon dioxide = 6.292 g

Putting values in above equation, we get:

$90=\frac{\text{Experimental yield of carbon dioxide}}{6.292g}\times 100\\\\\text{Experimental yield of carbon dioxide}=\frac{90\times 6.292}{100}=5.663g$

Hence, the amount of carbon dioxide formed in the reaction is 5.663 grams

7 0

3 years ago

Can anyone answer 10.4? (45 points if correct)

otez555 [7]

Alpha is the -OH group at the anomeric position is down. beta is up

a. alpha
b. beta
c. beta
d. alpha

to draw the other anomer, just flip the OH at the anomeric position

3 0

3 years ago

How many liters of methane gas (CH4) need to be combusted to produce 12.4 liters of water vapor, if all measurements are taken a

Ivan

The balanced chemical reaction is written as:

CH4 (g) + 2 O2 (g) ----> CO2 (g) + 2 H2O (g)

We are given the amount of water to be produced from the reaction. This amount will be used for the calculations. Calculations are as follows:

12.4 L H2O ( 1 mol / 22.4 L ) ( 1 mol CH4 / 2 mol H2O ) ( 22.4 L / 1 mol ) = 6.2 L CH4

7 0

3 years ago

The atoms of gold would be the same as the atoms of iron and have the same properties. True or false?

Nina [5.8K]

Answer:

false

Explanation:

not too sure sorry if im wrong

7 0

3 years ago

Help please please please!

LenaWriter [7]

Answer:

I say the second one, im not rlly sure tho

Explanation:

5 0

3 years ago