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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

<u>Answer:</u>

<em>B. Cotton</em>

<u>Explanation:</u>

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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What is the density of an object with a mass of 140 g and a volume<br> of 6 ml

Strike441 [17]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{140}{6} = \frac{70}{3} \\ = 23.3333...$

We have the final answer as

Hope this helps you

5 0

3 years ago

Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas. Write a balanced chemical equation for t

Alona [7]

Answer:

The balanced chemical equation is Mg + 2HCl ⇒ MgCl2 + H2

The molarity of the hydrochloric acid solution is HCl 0.04 M and the pH = 1.4.

The volume of hydrogen gas produced by the reaction of 0.510 g of Mg will be 0.482 L.

Explanation:

First, for the balanced equation you have to consider the oxidation state of the elements to find subscripts. Then you can find the correct coeficients. Mg= +2, Cl = -1.

Mg + HCL ⇒ MgCl2 + H2

For the molarity of the solution you have to notice tha if 0.510 grams of Mg reacts with 0,5 L of hydroclhoric acid, and from the previous equation 1 mol of Mg reacts with 2 mol HCl.

The atomic mass of Mg = 24.31 grs/mol

24.31 grs------------ 1 mol Mg

0.510 grs------------ x=0.02 mol Mg.

If 1 mol of Mg reacts with 2 mol HCl, then 0.02 mol of Mg will react with

0.04 mol HCl. So, the molarity of the solution is 0.04 M HCl.

Then to calculate the pH we use the formula pH = - log [H+]

⇒ pH = -log [0.04]⇒ pH=1.4.

Finally, from the balanced equation and the findings described, and considering that at 25°C and 1.00 atm 1 mol of gas has volume of 24.1 L.

1 mol H2----------- 24.1 L

0.02 mol H2----- x= 0.482L.

3 0

3 years ago

Help me please!!! HELP ME

Neporo4naja [7]

Answer:

Its a

Explanation:

3 0

3 years ago

A gas starts at a volume of 23 L and a pressure of 1.23 atm. What is the new pressure if you

Anna71 [15]

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we are finding the new volume

$V_2 = \frac{P_1V_1}{P_2} \\$

From the question we have

$V_2 = \frac{1.23 \times 23}{15} = \frac{28.29}{15} \\ = 1.886$

We have the final answer as

Hope this helps you

7 0

2 years ago

Donna and Ellis have been married for over 30 years which of the following is likely to be most important in their relationship

OleMash [197]

30 because it is the highest number of marriage

8 0

3 years ago