what process separates pigments from a plant extract?

Answer:

Solution

Explanation:

Solution

Answer:

Element

Explanation:

An Element cannot be broken down into any other substance or anything smaller. A Element is the Smallest Known Substance in the World.

According to Webster's Dictionary states "Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms."

Answer: To test the properties of the particles, Thomson placed two oppositely-charged electric plates around the cathode ray. The cathode ray was deflected away from the negatively-charged electric plate and towards the positively-charged plate. This indicated that the cathode ray was composed of negatively-charged particles.

Thomson also placed two magnets on either side of the tube, and observed that this magnetic field also deflected the cathode ray. The results of these experiments helped Thomson determine the mass-to-charge ratio of the cathode ray particles, which led to a fascinating discovery−-−minusthe mass of each particle was much, much smaller than that of any known atom. Thomson repeated his experiments using different metals as electrode materials, and found that the properties of the cathode ray remained constant no matter what cathode material they originated from. From this evidence, Thomson made the following conclusions:

The cathode ray is composed of negatively-charged particles.

The particles must exist as part of the atom, since the mass of each particle is only ~1/2000 the mass of a hydrogen atom.

These subatomic particles can be found within atoms of all elements.

While controversial at first, Thomson's discoveries were gradually accepted by scientists. Eventually, his cathode ray particles were given a more familiar name: electrons. The discovery of the electron disproved the part of Dalton's atomic theory that assumed atoms were indivisible. In order to account for the existence of the electrons, an entirely new atomic model was needed.

Answer:

Dalton's

Explanation:

The answers include the following:

This is referred to as the largest organ in the body which has a rich network of nerves and blood vessels and is responsible for protecting the body from pathogens and other foreign bodies.

Living organisms such as humans have different skin colors and is based on the amount of the protein known as melanin present in it .The color of the skin of a chicken wing ranges from white to yellow and is attached to the subcutaneous tissue.

This type of tissue is responsible for connecting the skin to the muscles and bones which are present in the body so as to perform functions necessary for the survival of the animal.

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The statement that is true about nonelectrolytes is that nonelectrolytes do not dissociate in water. This means that they do not produce ions when dissolved in water.

Nonelectrolytes are compounds that do not conduct electricity when dissolved in water. They are also unable to form ions in a solution. Ethanol, glucose, and sucrose are examples of nonelectrolytes. Electrolytes are chemical compounds that can conduct electricity when dissolved in water. Electrolytes are divided into two types, strong and weak electrolytes. NaCl and HCl are examples of strong electrolytes, while CH₃COOH and NH₄OH are examples of weak electrolytes.

Nonelectrolytes do not dissociate in water, unlike electrolytes, which break up into cations and anions when dissolved in water. When an electric potential is placed across an electrolyte, these ions transport electrical charge, whereas nonelectrolytes do not.

Among the given options, "Nonelectrolytes do not dissociate in water" is the statement that is true about nonelectrolytes.

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Answer:

Neon is a noble gas, it is monoatomic in nature, which implies that it has only one atom present. If we compare neon with water, water has three atoms present, two hydrogen atoms and one oxygen atom. Hence water stores more energy than neon because it is polyatomic and contains chemical bonds.

Glycoproteins are proteins to which carbohydrates have been covalently attached. The amino acid R groups that serve as sites for linkages in glycoproteins include serine, threonine and asparagine.

Additionally, tyrosine, which contains a phenolic hydroxyl group, can also serve as a site for the attachment of carbohydrate moieties to proteins. Glycoproteins are a type of protein that has one or more carbohydrates covalently attached to it.

They play a vital role in many cellular functions, such as cell signaling and recognition. The amino acid R groups that serve as sites for linkages in glycoproteins are important in determining the function of the protein.

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Answer: B) You are to continue heating the round-bottom flask until all liquid has been distilled.

Explanation:

Fractional distillation refers to a method that's useful for the separation of mixtures of solvents whereby there is less than 40°C in the boiling point difference.

With regards to the options given, the incorrect statement about the procedure for distillation is that you are to continue heating the round-bottom flask until all liquid has been distilled. This isn't correct.

Tree species increased while small plant species decreased.

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The specific heat capacity of a substance is the amount of energy required to raise the temperature of 1g of the substance by 1K.

Calculating the change in temperature:

By substituting what we are given into the equation to solve for the unknow x we have;

Answer: Energy needed is 449.35J

Answer:

Grams of chlorine gas to moles

The SI base unit for amount of substance is the mole. 1 grams Chlorine is equal to 0.028206357713029 mole.

Explanation:

Answer:

Explanation:

To find the mass given the force and acceleration we use the formula

\(mass = \frac{force}{acceleration} \\ \)

From the question

force = 20 N

acceleration = 4 m/s²

We have

\(mass = \frac{20}{4} \\ \)

We have the final answer as

Hope this helps you

Answer:

D is the most soluble in water at 60 degrees Celsius

According to the data given in the table, the salt is most soluble at 60o C - salt D.

In the given table it is given that all the salts are soluble in different concentrations in different concentrations of the water at the same temperature of 60 degrees celsius.

Converting them in the same amount of H₂O that is 100 grams in the same ratio:

Thus, the salt D is the most soluble that is 50 grams per 100 gram H₂O.

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Answer:

A process during which chemical bonds between atoms are broken and new ones are formed, producing one or more substances.

Moles are the amount of substance that contains as many particles.

Explanation:

A chemical reaction is when a chemical change occurs for example when a nail comes into contact with air and is then exposed to air it begins to rust. It forms a red-brown substance which changes the chemical composition of the original compound.

Examples of chemical reactions:

Combustion

Oxidation (rusting)

Cooking an egg

Photosynthesis

Digestion

Fireworks

Paper Burnin

The mole is the amount of substance that contains as many particles (molecules, ions or atoms) as there are in 12g of carbon.

1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12 and that number is referred to as Avogardo's constant (6.022 x \(10^{23}\)).

Answer:

wavelength, amplitude, frequency, time period, and velocity

Explanation:

There are five main characteristics of soundwaves, that being;

wavelength, amplitude, frequency, time period, and velocity

Answer:

Notice that the total charge (2-) is the same on both sides of the equation, and that this is reaction can take place in both directions.

Explanation:

The order of increasing disorder is solid, liquid, and gas. This arrangement is based on the increasing freedom of movement and randomness of the particles as we move from solid to liquid to gas.

Solid: Solids have a highly ordered arrangement of particles, with strong intermolecular forces and fixed positions of atoms or molecules.

Liquid: Liquids have less order compared to solids, as particles have more freedom of movement while still maintaining close proximity to one another.

Gas: Gases have the highest degree of disorder among the three phases. Gas particles are widely spaced, move freely, and lack a definite shape or volume.

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The group of elements found as diatomic molecules at standard conditions (room temperature and pressure) is known as the diatomic elements. These elements exist naturally as diatomic molecules, meaning they form stable molecules by bonding two atoms of the same element together.

The diatomic elements are:

1. Hydrogen (H₂)

2. Nitrogen (N₂)

3. Oxygen (O₂)

4. Fluorine (F₂)

5. Chlorine (Cl₂)

6. Bromine (Br₂)

7. Iodine (I₂)

These elements are all found in Group 17 (Group VIIA) of the periodic table, except for hydrogen which is in Group 1 (Group IA). Diatomic molecules are formed due to the sharing of electrons through covalent bonding between the atoms of the same element.

It's important to note that under certain conditions, some elements can exist as diatomic molecules temporarily, but not under standard conditions. For example, elements such as sulfur (S₈) and phosphorus (P₄) can form diatomic molecules under specific temperature and pressure conditions.

The diatomic nature of these elements has important implications for their reactivity and chemical properties.

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Answer:

In one mole of carbon , there are 6.02 × 1023 atoms. so in two moles , there will be twice that = 1.204× 1024.

Explanation:

The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance linked to acid rain.

Several principal emissions result from coal combustion: sulfur dioxide, which contributes to acid rain and respiratory illness.

Answer:

The balanced chemical equation for the combustion of propane is: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g).

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Answer:

The TV signal.

Explanation: Hope this is right! :)

Answer:

laboratory/safety shower.

Otherwise, immediately wash with water and tell your teacher or instructor.

Given that the volume and molarity of barium acetate are 38.2 ml and 5.0 M, respectively. We need to find the theoretical mass in grams of the precipitate. Let's first write the balanced chemical equation for the reaction taking place: Rubidium Carbonate + Barium Acetate → Barium Carbonate + Rubidium AcetateRb2CO3(aq) + Ba(C2H3O2)2(aq) → BaCO3(s) + 2 RbC2H3O2(aq).

We can see that 1 mole of barium acetate reacts with 1 mole of barium carbonate. Hence, the molar ratio of barium acetate and barium carbonate is 1:1.Using the molarity and volume of barium acetate, we can find the moles of barium acetate as: Moles of barium acetate = Molarity × Volume in litres= 5.0 mol/L × (38.2/1000) L= 0.191 moles. Now, from the balanced chemical equation, we can see that 1 mole of barium carbonate is formed from 1 mole of barium acetate.

Therefore, the number of moles of barium carbonate formed will also be 0.191 moles. Now, let's calculate the mass of barium carbonate using its molar mass. Molar mass of BaCO3= (1 × atomic mass of Ba) + (1 × atomic mass of C) + (3 × atomic mass of O)= (1 × 137.33 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol)= 197.33 g/mol. Theoretical mass of BaCO3= Number of moles of BaCO3 × Molar mass of BaCO3= 0.191 mol × 197.33 g/mol= 37.7 g. Therefore, the theoretical mass of the precipitate is 37.7 g (approx) when only the volume and molarity of the barium acetate are taken into account. Note: In order to find the limiting reagent and the actual mass of the precipitate formed, we need to consider the volume and molarity of both the reactants.

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Answer:

that's a difficult question

Explanation:

Sorry!!!!!

Answer:

A. grou(I)

B. 3rd period

C. Sodium (Na)

Explanation:

it belongs to group (I) since it has one valence electron

it belongs to 3rd period since it has three energy levels

Answer:

Option B. A

Explanation:

From the question given above, the following data were obtained:

C(s) + 2H₂ (g) —> CH₄ (g). ΔH = –74.9 kJ

From the reaction above, we can see that the enthalpy change (ΔH) is negative (i.e –74.9 KJ) which implies that the heat content of the reactants is greater than the heat content of the products. Thus, the reaction is exothermic reaction.

For an exothermic reaction, the energy profile diagram is drawn in such a way that the heat content of reactants is higher than the heat content of products because the enthalpy change

(ΔH) is always negative.

Thus, diagram A (i.e option B) gives the correct answer to the question.

Answer:

B. A

Explanation:

Graph A, I just took a quiz on  a p e x  and it was correct!:)

In this procedure, chemical compounds are heated to a boiling point when one or more fractions of the mixture will evaporate. It is the process that fractions via distillation.

It is a technique for dividing liquids with boiling temperatures that differ by at least fifty degrees. One of the instances of basic distillation is the distillation of water.

The periodic table lists the purest substances and fractions, and most of those substances can be found in nature. In reality, though, the majority of the things we come into contact with and consume on a daily basis are chemical compounds.

Any chemical combination of two or more elements is known as a chemical compound.

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