Describe a method you could use to carry out paper chromatography.

Answers

Answer 1
Paper Chromatography Methodology :

paper chromatography, in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper..The method consists of applying the test solution or sample as a spot near one corner of a sheet of filter paper.

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Related Questions

(1) What is the history of renewable energy in the United States?

(2)What are the advantages and
disadvantages of renewable energy?

(3)What can you do to help forsee a sustainable energy future
in the United States?

You must address all of these
questions in a minimum 2 paragraphs.

Answers

Answer:

Historically, wood was the main source of U.S. energy until the mid-1800s and was the only commercial-scale renewable source of energy in the United States until the first hydropower plants began producing electricity in the 1880s.

The Advantages of Renewable Energy Resources-A Fuel Supply That Never Runs Out.Zero Carbon Emissions.Cleaner Air and Water.Disadvantages of Renewable Energy-he Electricity Generation Capacity is Still Not Large Enough.Renewable Energy Can be Unreliable.

First, we need to take advantage of the world's abundant natural gas resources and reduce coal consumption;

Second, governments must support development of carbon capture and storage technology to make fossil fuel use cleaner;

Explanation:


A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81
g Cl. What is this compound's percent composition?

Answers

Explanation:

getting the empirical formula

For carbon

3.01/12 = 0.2508

For oxygen

4/16 = 0.25

For Cl

17.81/35.5= 0.501

0.2508 ÷ 0.25 = 1.0032

0.25 ÷ 0.25 = 1

0.501 ÷ 0.25 = 2.004

Empirical formula of the compound = CCl20

Molar mass = (1×12) + (2×35.5) + (1×16)

= 12 + 71 + 16

= 99g/mol

percentage composition= 24.81/99 × 100

= 25.06%

A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. the compound's percent composition is  25.06%.

What are the application of carbon ?

The impure form of carbon is Amorphous which is used for the manufacture of car batteries and dry cells, ink and paints; So the majority element of carbon is present in charcoal, so these are used as fuel.

Graphite is derivative form of carbon used as a lubricant in heavy industrial machinery, making pencil leads, these carbon are used in the production of steel.

The empirical formula, For carbon 3.01/12 = 0.2508

For oxygen 4/16 = 0.25, For Cl 17.81/35.5= 0.501, 0.2508 ÷ 0.25 = 1.0032

0.25 ÷ 0.25 = 1

0.501 ÷ 0.25 = 2.004

Empirical formula of the compound = CCl20

Then the Molar mass = (1×12) + (2×35.5) + (1×16)

= 12 + 71 + 16

= 99g/mol

percentage composition= 24.81/99 × 100

= 25.06%

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how many grams of baf2 are dissolved in 75.0 ml of a saturated solution of baf2? ksp = 1.00 x 10-6

Answers

Using the solubility product of the saturated solution, the mass of BaF2 dissolved is 0.083 g.

The equation of the reaction is obtained from;

BaF2(s) ⇄ Ba^+(aq) + F^-(aq)

The concentration of the substance can be obtained from the Ksp as follows;

Ksp = [Ba^2+] [2F^-]^2

Ksp = 4x^3

x = ∛Ksp/4

x = ∛ 1.00 x 10-6/4

x = 6.3  x 10^-3 M

Given that;

mass/molar mass = concentration x  volume

molar mass  = 175 g/mol

concentration  = 6.3  x 10^-3 M

volume = 75.0 ml or 0.075 L

Mass = ?

Mass  = concentration x  volume x molar mass

Mass  = 6.3  x 10^-3 M x  0.075 L x   175 g/mol

Mass = 0.083 g

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a. Write thepossible isomers of C4 HgBr4​

Answers

The four isomers of C4​H9​OH are

As refer to IMAGE 01- Butan−1−ol

As refer to IMAGE 02- Butan−2−ol

As refer to IMAGE 03- 2−methylpropan−2−ol

As refer to IMAGE 04- 2−methylpropan−1−ol

solution

https://www.toppr.com/ask/en-gb/question/write-down-all-isomers-of-c4-h9oh/

The barometric pressure in Breckenridge, Colorado (elevation 9600 ft) is 580 mmHg. How many kPa is this?

Answers

Answer:

1 atmospheric pressure = 760.0 mm Hg

Thus 580 mm Hg = (580 mm Hg/(760 mm Hg/atm))

= 0.763 atm

Question 13 (2 points)

Given the following images, choose the one that most likely represents an M-class star. (2 points)

A

B

с

D

Оа

A

Oь в

Ос

О с с

Od D

Answers

Answer:

b. because its Rigel star

Explanation:

hope itsattachments

The reactant side of a balanced chemical equation is shown below,
PC15 + 4H20 →
How many hydrogen atoms should there be on the product side in the equation? (5 points)
8
6
4
2

Answers

Answer:

do u still need the answer..

Explanation:

Jane made this picture to represent a chemical reaction:

Two circles, one white and the other gray are shown on the left. A small portion of the two circles overlap and the label below the circles is XY. An arrow pointing right is shown on the right of the overlapping circles. There are two circles on the right of the arrow, one white and the other gray, and there is a plus sign between them. The white circle is labeled X and the gray circle is labeled Y.

Which of the following statements best explains the type of chemical reaction represented by Jane's picture? (5 points)

It represents a synthesis reaction because one combined reactant forms multiple products.

It represents a synthesis reaction because the same atoms are present in the reactants and products.

It represents a decomposition reaction because one reactant breaks apart and forms two products.

It represents a decomposition reaction because the total mass of the products is less than the mass of the reactant.

Answers

The reaction represents a decomposition reaction because XY is broken into its constituents.

A decomposition reaction is one in which the reactant is broken up into its constituents. In this case, the reactant is XY. The reactant is shown in the left hand side. The reactant is broken up to yield the products. X and Y.

Since the reactant was broken up into the one white and one gray circles labelled X and Y, then the reaction is a decomposition reaction.

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Answer:

C if your answers are different!

Explanation:

what is the formula of trinitrogen tetrabromide

Answers

The formula of trinitrogen tetrabromide is N3Br4

How to determine the molecular formula

Trinitrogen features three molecules of nitrogen, N3

Tetrabromide features four molecules of bromide = Br4

Thus, the formula of trinitrogen tetrabromide is N3Br4

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What are the most of the elements in the periodic table

Answers

Answer:

Most of the elements in the periodic table are metals.

Hope that helps. x

Answer:

Here is your answer,mate!

Explanation:

Metals are the most of the elements in the periodic table.

Fill in the blank:
A correctly written hypothesis uses an ____ ______ statement

Answers

Answer:

a theory of a experiment and the experiment acts like a judge determining if the hypothesis is right or wrong from the final test result

Explanation:

why do the noble gases have relatively low electron affinities?

Answers

Answer:

Because noble gases have a full octet, their ionization energies are actually quite high. Electron affinity is the amount of energy released when an electron is added to a neutral atom. Because noble gases have stable electron configurations, they have very low electron affinities.

Explanation:

Answer:

Noble gases have a stable outer shell

Explanation:


What is the chemical reaction by which organisms break down food
molecules for energy?


Answers

Answer:

cellular respiration

Explanation:

hope this helps :)

brainliest plzzzzzzz

PLEASE HELP I DON´T KNOW WHAT THE DIFFERENCE BETTWEEN THE TWO IS!


What is the difference between a product and a reactant.

Answers

Answer:

A reactant is a substance that is present at the start of a chemical reaction. A product is a substance that is present at the end of a chemical reaction.

Explanation:

21. Which of the following is the best way to clean up an acid spill?
A. Wash down the acid spill with plenty of water.
B. Wipe up the acid spill with paper towel.
C. Spread sawdust on the acid spill to absorb it.
D. Neutralize the acid spill with a base; then wash it with plenty of water.
T1

Answers

The answer is D
If wrong then sorry

Which atom has the largest atomic radius? *
1.Cl
2.F
3.I

Answers

Answer: 2

Explanation:I think

Why do trees not yet colonize the island?

Answers

Because we humans keep taking them down

How long is a sunflower seed? Select the best estimate.
15 meters
15 kilometers
15 millilmeters
15 centimeters

Answers

Answer:

15 millimeters

Explanation:

the other answer choices are too large.

Answer:

15 millimeters

Explanation:

The other options are too long.

What is the relationship between layering of fluids and density?

Answers

Density of a liquid determines how it will layer (heaviest to lightest). If the liquid is least dense it will float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.

Which subatomic particles have a positive charge and are located in the nucleus?
a. neutrons
b. atoms
c. electrons
d. protons

Answers

Answer: protons

Explanation:

a) Neutrons are located in the nucleus but have a negative charge.

b) Atoms are not subatomic particles but are rather made of subatomic particles.

c) Electrons are subatomic particles with a negative charge that are located outside of the nucleus.

d) Protons are subatomic particles that are located in the nucleus and have a positive charge.

BRAINLIEST TO FIRST RIGHT ANSWER

Students were investigating heat transfer by conduction and they set up the simple experiment you see here. They utilized three spoons made of different materials: the specific heat capacity of each material was recorded in the students' data table. Each spoon was placed in a pot of hot (90°C) water and a pat of butter was placed on the handle of each spoon. The butter melted first on the tin spoon and in about the same amount of time on the plastic and wood spoons. Based on the data table and the experimental results select ALL of the conclusions that are appropriate.

A) Conduction occurred more readily in the tin due to its lower specific heat
capacity

B) Heat transfer via conduction occurred from the hot water to the spoons
and then to the butter,

C) When in contact with hot water, there was no transfer of kinetic energy
through the wood or plastic

D) The atoms in the tin spoon vibrated and collided at a greater rate thon
those in the wood or plastic spoons

E) In all three cases energy s transferred from the faster moving hot water
molecules to the slower moving molecules in the spoon​

Answers

Answer:

the Answer is A B D

Explanation:

the cunduction in the spoons are equal to all the following answers

Conduction occurred more readily in the tin due to its lower specific heat capacity, Heat transfer via conduction occurred from the hot water to the spoons and then to the butter, The atoms in the tin spoon vibrated and collided at a greater rate thon those in the wood or plastic spoons. Thus option A,B, D are correct.

What is specific heat ?

Specific heat can be measured as the quantity of heat required to increase the temperature of one gram of a substance by one degree Celsius.

The units of specific heat  are represented as calories or joules per gram per Celsius degree such as the specific heat of water is 1 calorie  per gram per Celsius degree

Specific heat capacity= Heat quantity/ mass × change in temperature.

If Q is the quantity of heat in joules, M is the mass of substance heated,

If ∆O is the change in temperature in Kelvin, Then Q= MC∆O, C is a constant called Specific heat capacity. Therefore, making C the subject of formula:

C= Q /M∆O

Thus option A,B, D are correct.

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the method of mass production that developed during the nineteenth century was a process that

Answers

Answer:

Relied on the use of power driven machinery

Explanation:

Its because the machines would increase the mass productivity of goods

B. Number the digestive process in the correct sequence. Write A-E on the blank 21. Food moves into the small intestine. 22. Food is stored and further broken down by acid and powerful enzymes 23. Your saliva helps break down what you're eating and turn it into chemicals called enzymes. 24..Food moves through your esophagus. 25. Anything left in the small intestine moves into the large intestine​

Answers

Answer:

21. D (Food moves into the small intestine.)

22. C (Food is stored and further broken down by acid and powerful enzymes.)

23. A (Your saliva helps break down what you're eating and turn it into chemicals called enzymes.)

24. B (...Food moves through your esophagus.)

25. E (Anything left in the small intestine moves into the large intestine.)

Explanation:

Food first enters the mouth where it is chewed and broken down by salivary amylase. Then, it is swallowed, moving down the esophagus to the stomach where it is stored and further broken down by acids and enzymes. And, these broken down food molecules moves into the large intestine.

Choose all of the examples that show a chemical change.
A) A woodpecker digs in the bark.
B) A dead tree rots on the ground.
C) A forest fire burns a lot of trees.
D) A farmer is cutting logs with an axe.
E) A tree drops rainwater from its leaves.

Answers

Answer:

B and C

Explanation:

Answer:

B) A dead tree rots on the ground.

C) A forest fire burns a lot of trees.

Explanation:

It cannot return the the state it was in before or have the same composition it had before.

Identify the subatomic particles in strontium-82 and rubidium-82. Then, explain what type of nuclear decay is most likely to convert strontium-82 to rubidium-82.

Answers

We can convert strontium-82 to rubidium-82 by positron emission.

The three main fundamental subatomic particles in an atom are;

ProtonsNeutronsElectrons

In a neutral atom, the number of protons is always equal to the number of electrons.

In strontium-82, there are 44 neutrons, 38 electrons and 38 protons. In rubidium-82, there are 45 neutrons, 37 electrons and 37 protons. We can convert  strontium-82 to rubidium-82 by positron emission.

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Which substances will make a salt when combined?

Vinegar and tea

Soda and wine

Soda and ammonia

Fertilizer and detergent

Answers

Answer:

Soda and wine is the answer to your question.

Explanation:

yo make salt you need a base and an acid. in this case the base is soda and the wine is acid. hope that helps :)

Part A
What question is being asked through this scientific investigation?
(I didn’t know what subject so sorry, also only answer if u have an answer.)

Answers

pretty sure it’s to see whether carbon dioxide is formed in each bottle so if it does form then the balloon would expand

Answer:

How will the ingredients effect the fermentation of each bottle? What will happen to the bottles and balloons when fermentation occurs?

Explanation:

Why do some atoms form chemical bonds while others do not?

Answers

Answer:

Atoms of these elements have full outer electron shells. These atoms are stable and very rarely form bonds with other atoms. If the electronegativity values between two atoms are comparable, they may still form chemical bonds to increase the stability of their valence electron shell

Explanation:

What is the purpose of an indicator in a titration.

Answers

Answer:

The role of indicator in titration is to detect the endpoint of the titration. When the colour of the solution changes, it indicates that the concentration of the chemical specie has reached a critical range. This change in colour is possible with the help of indicators.

Explanation:

hope it helps

#carry on learning and keep safe

correct me if I'm wrong and if correct brainliest me please

Hence, indicators in a titration are used to identify the equivalence or the end point of a reaction where pH change occurs. Note: Apart from phenolphthalein, methylene orange is also used as an indicator that changes color when pH changes. It has red color in acidic solution, and a yellow color in basic solution.

I hop this helps! :)

Do cells have atoms?

Answers

Answer:

Ye? everything is made up of atoms so sure

Other Questions
Complete the explanation of how you can use a table of values, an equation, anda qraph to determine whether a function represents a proportional relationship. who was bise nagarchi? 1. Why was Britain the first country toindustrialize? solutions to problems facing Nairobi as an urban centre Giselle pays $279 in advance on her account at the athletic club each time she uses the club $29.99 is deducted from her account. Which answer models her question bestY = 279(29.99)^xY = 279(-29.99)^xY = 29.99x - 279Y = -29.99x + 279 One minute is (60,12,50,100 pick one ) times as long as ( one hour or one second) What differences does chromatography rely on to separate out parts of a solution. Help me please ;-;NO LINKS!!!A ___________ represents a relationship between two quantities. Select all that apply.A. EquationB. GraphC. TableD. Function Find the product of 5 and 539. The number of hours needed to assemble computers varies directly as the number of computers andinversely as the number of workers. If 16 workers can assemble 40 computers in 10.25 hours, how manyworkers are needed to assemble 68 computers in 16.40 hours? Identify two examples of situational irony from the text to story of an hour. gusto ko mamaty pero sayang naman ganda ko diba ok. He stays up late (because or so) he makes the cake,So or because??Plssss help The function f(x) goes through the point (1, 8). What point will this translate to in the function f(x) = (x - 4) + 5? (5, 13) (-3, 3) (5, 3) (-3, 13)BRAINLIEST What is the conflict in this story? A. Jess wants to ride his bike, but his parents will not let him because he is not careful enough. B. Jess wants to invent new things, but his parents think he should be outside riding his bike. C. Jess's parents want to bandage and treat his wound, but Jess does not want them to because it hurts. D. Jess wants to make a bandage that is easier to remove, but he will not have time before his knee heals Choose two expressions that are equivalent to 5 (3a + 4b).A. 15a + 4bB. 15a + 206C. 5a + 3a + 4bD. 5a + 10a + b + 3bE. 10a + 5a + 15b + 5bPick two answers At the end of last year, Cynthia, a 20 percent partner in the five-person CYG partnership, has an outside basis of $28,500, including her $14,000 share of CYG debt. On January 1 of the current year, Cynthia sells her partnership interest to Roger for a cash payment of $21,500 and the assumption of her share of CYG's debt CYG has no hot assets. What is the amount and character of Cynthia's recognized gain or loss on the sale?A. $7,000 capital loss. B. $2,000 ordinary loss. C. $7,000 capital gain. D. $7,500 ordinary income. Ronnie wants to lower his utility bills to save money on his monthly expenses. He discovers that if he replaces his water heater with a solar water heater his monthly utility bills can decrease around 50% to 85%. At the end of the year ronnie wants to calculate the percentage his new solar water heater saved him in the utility bills compared to last year. Ronnie's total utility expenses for this year are $862. 40 and last year the utility expenses were $1935. 67. What percentage did ronnie save on his utlility bills by switching to a solar water heater?. (In your own words) What do interior designers do? White Chocolate Chunk Pecan CookiesINGREDIENTS1 1/4 cups all-purpose flour1/2 cup unsalted butter1/2 teaspoon baking powder1/2 teaspoon salt1/2 cup white sugar1/4 cup packed brown sugar1 egg1 teaspoon vanilla extract1/2 cup chopped white chocolate1/3 cup chopped pecansDIRECTIONSBlend sugar and butter together until smooth and creamy. Add the egg and vanilla; blend well.Sift together the flour, salt, and baking powder; combine these ingredients with the creamed mixture. Add chopped white chocolate and nuts.Spoon dough out onto a cookie sheet. Bake at 375 degrees F (190 degrees C) for about 5 to 10 minutes, or until golden brown on the bottom. Let cool slightly on the cookie sheet before removing, or they'll break.What was the author's purpose for writing this passage?A. to inform readers of the proper way to eat cookiesB. to entertain readers with a tale of two cookiesC. to persuade readers that white chocolate is betterD. to provide instructions on how to bake cookies