Fractions of crude oil​

Carotenoids are found in high concentrations in yellow and orange leaves or vegetables. These leaves and vegetables appear yellow or orange because of Reflect and Transmit.

Reflection and Transmission:

Reflection is the change in direction of a wave front at the interface between two different media in such a way that the wave front returns to the medium in which it was originally located. Common examples include reflections of light, sound, and water waves. According to the law of reflection, in specular reflection (e.g. a mirror) the angle at which the wave strikes the surface is equal to the angle at which it is reflected.

Transmission is defined as the process of transmitting light from any substance. Transmission is the movement of electromagnetic waves through any substance.

Example: When UV light hits a material, the electrons in the material's ground state enter a higher electronically excited state. When an electron in a higher state returns to its ground state, it transfers energy in the form of a photon.

Carotenoids

Carotenoids , also called tetraterpenoids, are yellow, orange, and red organic pigments produced by plants and algae, as well as some bacteria and fungi. Carotenoids give pumpkins, carrots, parsnips, corn, tomatoes, canaries, flamingos, salmon, lobster, shrimp, and daffodils their unique colors. All these organisms can produce carotenoids from fats and other basic organic metabolic components.

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The hazardous substance in automobile exhaust that is also present in high concentration in tobacco smoke is acrolein.

Substance that tobacco smoke and the exhaust of automobiles contains a has it is substance called acrolein in very very high concentration.

Inhaling acrolein can give rise to several breathing problems like shortness in breathing and also irritation in lungs.

Acrolein is formed when the fats are overheated apart from automobiles and tobacco a very low amount of acrolein is also found in over used cooking oil.

To reduce acrolein from the automobile exhaust lead based adsorption substances are preferred to be used in automobile exhaust.

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Solutions of benzene, hexane and hexene can all be separated based on differences in boiling point.

A fail-proof method of identifying compounds is by the use of properties such as boiling point for liquids. Since Hexane, hexene and benzene are all liquids, the liquids can all be subjected to heating and the boiling points of the solutions are observed.

Recall that the boiling points of pure chemical substances have been documented in literature, the boiling points obtained for each sample can be compared with the boiling points in literature and the different solutions can be correctly identified:

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Answer:

C-C

A carbon has 4 valence electrons meaning it can share 4 electrons and is in short of 4 electrons to fill it outer energy shell making it 8. Which results to 2 double covalent bonds ,meaning there was a sharing of 2(4) = 8 electrons . Hope this helps . Your statement above is true .

Multivariate time series analysis refers to the study of the properties of correlated and multiple time series and how they can be forecasted together. Time series models are used to describe and analyze multivariate time series. These models can be applied to several fields, including finance, engineering, and economics.

The VAR model is one of the most commonly used time series models in multivariate time series analysis. It is a statistical model that predicts the future values of multiple time series based on their past values. In this model, each variable is expressed as a linear function of its past values and the past values of the other variables in the system. It is also assumed that the errors in the model are independent, normally distributed, and have constant variance.

There are several other models that can be used in multivariate time series analysis. These include Vector Error Correction Model (VECM), Multivariate GARCH (MGARCH), and Multivariate Autoregressive Conditional Heteroskedasticity (ARCH) models. These models are used to analyze complex data and can provide valuable insights into the relationships between variables in a multivariate time series.

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The R groups on the protein contribute most to its overall acid-base properties.

Each amino acid in a protein has an R group, also known as a side chain, which can vary in composition and properties. The R groups can be categorized as acidic, basic, or neutral based on their functional groups. Acidic R groups contain carboxyl groups (e.g., aspartic acid, glutamic acid) that can donate protons, making them capable of acting as acids. Basic R groups contain amino groups (e.g., lysine, arginine, histidine) that can accept protons, making them capable of acting as bases. Neutral R groups do not have significant acid or base properties.

Since proteins are composed of amino acids linked together, the presence of different R groups throughout the protein sequence contributes to its overall acid-base properties. Acidic and basic R groups can donate or accept protons, respectively, influencing the protein's pH-dependent behavior, including its ability to act as a buffer or interact with other molecules. On the other hand, the C-terminal α-carboxyl group and the N-terminal α-amino group, while important for the protein's structure and function, do not contribute as significantly to its acid-base properties as the diverse set of R groups present throughout the protein sequence. Therefore, the R groups on the protein are the main contributors to its overall acid-base properties.

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The nuclei of atoms become unstable when the repelling forces of the protons cannot be balanced by the number of neutrons in the nucleus. It then re-arranges itself randomly to a more stable configuration by emitting any of a series of particles. During radioactive decay, an atom does not collapse.

Since an atom is mostly empty space - that is it’s nucleus is relatively distant from the electron shells so, in the presence of extreme forces such as gravity inthe collapse of a large star, the inward pressures on the atom overcome the natural balance of the atomic structure and the ‘empty space’ disappears as nuclei are mashed together by the intense pressures and a neutron star is formed. Under even more external pressure, even the neutron star can collapse to form a black hole.

A chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

The process of joining two or more atoms or molecules to form a single product is known as a chemical reaction. These reactions can be divided into two categories: combination and decomposition reactions.

During the process of condensation reaction a small molecule is eliminated as a byproduct, such as water or alcohol.

The condensation reaction can be utilized to create a variety of polymers by joining smaller monomers together into more complex molecules.

This reaction can be utilized to create peptide bonds between amino acids in proteins, ester bonds between carboxylic acids and alcohols, and glycosidic bonds between sugars, for example.

In addition to the condensation reaction, there are other types of chemical reactions.

For example, Hydrolysis, decomposition, single displacement, double displacement, acid-base, redox, and oxidation reactions are all examples of different types of chemical reactions.

In summary, a chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

This process is used to create a variety of polymers by joining smaller monomers together into more complex molecules.

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The Avogadro's number is the constant number for the number of atoms or molecules represented in 1 mol, this number is equal to 6.022*10^23, to find out how many molecules there are in 6.0 moles we can set up this equation:

6.0 moles of CH4 * 6.022*10^23 molecules / 1 mol of CH4

The answer will be 3.61*10^24 molecules of CH4

Answer:

When two or more atoms are chemically joined together, this is called a molecule. In some cases, such as hydrogen and oxygen, the molecule is made entirely of the same atom, such as hydrogen gas (a molecule) is made entirely of two hydrogen atoms. Here, converting molecules to atoms is as simple as dividing by two.

Atoms can join together - they form bonds together - to make MOLECULES. For example, two atoms of hydrogen hook together to form a molecule of hydrogen

Answer:

Thus, the element containing the greatest number of atoms is 12 g He. Thus, the correct option is (4) 12 g He. Note: The number of atoms of a compound is Avogadro's number for 1 mole of compound. The number 6.022×1023 is known as Avogadro's number.

Explanation:

(4)✔️ 12 g He

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Answer:

120gram I think so this is the answer if the answer is correct plz mark me as brainliest.

Answer: False

Explanation:

Answer: The mass

Explanation: ability to rust, flammability, and ability to combust are chemical properties.

Explanation:

after the food leaves the stomach it enters the small intestine

Answer:

after the food leaves the stomach it enters the small intestine

Explanation:

Answer:

chemical chlorine will have more reaction

"Hypotonic solution," refers to a solution with the highest water concentration due to its lower solute concentration compared to the other options, leading to water influx into cells.

A hypotonic solution would be most likely to have the highest water concentration. In a hypotonic solution, the solute concentration is lower than that inside the cell or compared to another solution. As a result, water tends to move into the cell or the solution to equalize the concentration.

When a cell is placed in a hypotonic solution, water molecules will move into the cell through the process of osmosis. This influx of water increases the water concentration inside the cell, leading to cell swelling or even bursting in extreme cases.

Compared to hypertonic and isotonic solutions, a hypotonic solution has a lower solute concentration, allowing for a higher concentration of water molecules. This results in a higher water concentration in the solution. It's important to note that the concept of tonicity is related to the relative solute concentrations between two solutions and their effect on cell osmosis. In this case, a hypotonic solution is characterized by a higher water concentration compared to the other options.

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Answer: c= 1.8 mol/l

Explanation: amount of substance remains same.

Amount of substance n = c1·V1 = c2·V2 and c1= c2·V2/ V1

Original concentration c1= 300 ml·0.750 mol/l / 125 ml

Answer:

Problem: What is the effect of the amount of fish feed on the mass of goldfish?

Hypothesis: I think that feeding the goldfish four times a day will greatest increase in the mass of the goldfish.

Explanation:

The problem tends to ask question to which the research is conducted. It open ways for ideas towards a particular topic.

While the hypothesis is a tentative or assumed stand on a subject. It is further tested through an experiment or survey and if after many trials it gives same results and the obtained results is concordant with the hypothesis, the hypothesis will then become accepted and a theory or law is formed thereafter.

The volume of the gas in a sealed container would be decreased at constant pressure: C. by raising the temperature.

Charles law states that when the pressure of an ideal gas is kept constant, the volume of a gas is directly proportional to the absolute temperature of the gas.

This ultimately implies that, the volume of a gas decreases at constant pressure when its temperature is decreased and vice-versa.

In conclusion, we can infer and logically deduce that the volume of the gas in a sealed container would be decreased at constant pressure by raising the temperature in accordance with Charles law.

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Answer: Where are the answers?

Explanation:

The expression to be rearranged K = [CO][Cl₂] [COCI₂]  are x = 0.327 or x = 339.

The expression to be rearranged K = [CO][Cl₂] [COCI₂] is:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²

We will expand and simplify the expression:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²(0.156)² + (0.156)(x) - (x)(0.156) - (x)² (0.263 + x)

= 5.00 × 10⁻²(0.156)² - (0.263)(0.156)(x) - (0.156)(x) + (0.263)(0.156)(x) + x²(0.263 + x) - 5.00 × 10⁻² = 0

After simplifying:

-0.0132302 x² - 0.001002 x + 0.0014256 = 0

This is in the form ax² + bx + c = 0 where a = -0.0132302, b = -0.001002 and c = 0.0014256

Using the quadratic formula, we have:

\(\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]\)

Substituting values, we get:

\(\[x = \frac{-(-0.001002) \pm \sqrt{(-0.001002)^2-4(-0.0132302)(0.0014256)}}{2(-0.0132302)}\]\)

Solving, we get:x = 0.327 or 3.39 × 10²

Therefore, the solutions are x = 0.327 or x = 339.

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Based on the given information, the type of light that is more likely to cause the quartz to become warm is infrared light.

Infrared light can cause the quartz to become warm because it has more energy compared to visible light. When infrared light interacts with the quartz, it bounces off the quartz and transfers some of its energy to the quartz, causing it to heat up. This is because infrared light has longer wavelengths and higher energy compared to visible light.

On the other hand, visible light does not have enough energy to directly warm the quartz. While visible light can pass through the quartz, it does not pull energy out of the quartz like infrared light does.

Therefore, the correct answer is option b: The infrared light can cause the quartz to become warm because the infrared light bounces off the quartz, which means that it has more energy.

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The maximum volume of alkane present in the distillate when the reaction is completed is 18.04 mL of alkane.

When the distillation of methylcyclohexanol is done, the product formed after the distillation is

C₇H₁₄O→C₇H₁₂+H₂O

To find out the volume of alkene mixture, we need to use the density formula which is given as

density=mass/volume

Rearrange the formula for volume

volume=mass/density

We have mass of methylcyclohexanol, which is 14.43g and density is 0.80 g/mL. Plug values in the formula

volume=(14.43g×mL/0.80g)

volume=18.0375 mL

volume=18.04 mL

Therefore, the volume of alkane present in the distillate when the reaction of methylcyclohexanol is completed is 18.04 mL.

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Answer:

These metals are less reactive than the neighbouring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column.

Explanation:

Magnesium is more active than beryllium; calcium is more active than magnesium; and so on.

Answ

Matt4r is all around

Explanation:

The Avogadro's constant, or 022 x 10 23 particles, is the quantity that corresponds to 1 mole.

What does the Avogadro's constant teach us about calculating the amount of moles of any material in the sample?

We may determine the number of particles in 1 mole (or mol) of a material using Avogadro's number. These particles can be atoms, molecules, or electrons. Avogadro's number is equivalent to around 6.0221408571023 mol1.

What makes it Avogadro's number?

It bears the name of the Italian physicist Amedeo Avogadro, who discovered that two gases of equal volume have the same number of molecules when they are at the same temperature and pressure. Early in the 20th century, French scientist Jean Perrin gave the number of units that name.

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Answer:

94%

Explanation:

204/216=.94444

.94444*100=94.44%