Which type of reaction occurs in the sun to release light and heat?

cohesion

chemical

fission

nuclear

Answer:

With an 18-carbon backbone, stearic acid is a saturated long-chain fatty acid.

What is Stearic Acid?

With an 18-carbon chain, stearic acid is a saturated fatty acid. Octadecanoic acid is the substance's IUPAC name. It has the chemical formula C₁₇H₃₅CO₂H and is a waxy solid. The word "stear," which means tallow in Greek, is where it gets its name. Stearates are the names for the salts and esters of stearic acid. The second most prevalent saturated fatty acid in nature after palmitic acid is stearic acid, which serves as its ester. [11] Stearin is the triglyceride produced when three molecules of stearic acid are combined.

Explanation:

Animal fat contains more stearic acid than vegetable fat does. The foods cocoa butter and shea butter are the notable exceptions because they contain stearic acid (as a triglyceride).

In terms of its biosynthesis, acetyl-CoA contributes two-carbon building blocks to the fatty acid synthesis machinery, which converts carbohydrates into stearic acid.

The triglycerides in fats and oils are saponified with hot water to produce stearic acid. After that, the resulting mixture is distillated.

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Answer:

The answer is A.

Explanation:

Answer:

A on edge

Explanation:

Answer:

yes I am good at the subject. That is my course

Answer:

EIA projects less than a quarter of the world's electricity generated from coal by 2050. net electricity generation by fuel.

Explanation:

The burning of fossil fuels, changing land use, and the production of concrete with limestone. As a result, the atmospheric concentration of carbon dioxide is fast.

Increasing and is already higher than it has ever been in the last 3.6 million years. Ocean acidification is brought on by the combustion of fossil fuels, which quickly releases carbon dioxide (CO2), a greenhouse gas, into the atmosphere. agricultural practises that contribute to the atmosphere's increase in greenhouse gases like methane (CH4) and carbon dioxide The use of fossil fuels has the greatest influence on humans in terms of the amount of carbon that is produced by human limestone activity.

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Energy as the ability to do work.

What is energy?

Energy has been defined as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work. People use energy to walk and for bicycle, to move cars along roads and boats through water, to cook food on stoves, to light our homes and offices, to manufacture products.

There are different forms of energy, which may include:

These forms of energy can be grouped into two general types;

Explanations

1. This is called convection.

2. You are using chemical energy and converting it to thermal (heat) energy.

3. Kinetic energy is the important factor

4. A hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or exemplified by the odors of gasoline. Examples of hydrocarbons are coal, petroleum, natural gas and tar. They are used as energy sources.

5. Radioactive waste. These materials can remain radioactive and dangerous to human health for thousands of years.

6. Mercury.

7. The energy of the sun is the original source of most energy used on Earth.

8. Heat is released and this heat expended allows work to be done.

9.

10.

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Answer:

1. physical change

2. chemical change

3. physical change

4. physical change

5. physical change

6. chemical change

7. chemical change?

8. physical change

1. chemical property

2. physical property

3. chemical property

4. physical property

5. chemical property

6. chemical property

7. physical property

8. physical property

9. chemical property

10. physical property

11. chemical property

12. chemical property

13. physical property

Explanation:

Answer:

(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced

Explanation:

Cl2 oxi no. = 0 became Cl- oxi no. = -1

so it is reduced

I- oxi no. = -1 became I2 oxi no. = 0

so it oxidized

Answer:

I think it's true

Answer:

Many thiols have pungent scents that resemble garlic or rotting eggs. Thiols are utilized as odorants to aid in the detection of natural gas (which is odorless in its pure state), and the "fragrance of natural gas" is owing to the thiol's smell.

Explanation:

Answer And Explanation:

An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms.

The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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To determine the correct statements about the reaction 2NO2(g) ⇌ N2O4(g), given ∆H° and ∆S°, we need to consider the relationship between enthalpy (∆H), entropy (∆S), and the spontaneity of a reaction.

1. ∆H° = -56.8 kJ: This indicates that the reaction is exothermic because ∆H° is negative. Exothermic reactions release energy to the surroundings.

2. ∆S° = -175 J/K: This indicates a decrease in entropy (∆S° < 0). The reaction leads to a decrease in disorder or randomness.

3. ∆G° = ∆H° - T∆S°: The Gibbs free energy (∆G°) of a reaction determines its spontaneity. If ∆G° is negative, the reaction is spontaneous at the given temperature.

Given the values of ∆H° and ∆S°, we can't directly determine the spontaneity of the reaction without knowing the temperature (T). The statement about the spontaneity of the reaction cannot be marked as correct or incorrect based on the given information.

Therefore, the correct statement is:

- ∆H° = -56.8 kJ, indicating the reaction is exothermic.

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The following equation can be used to determine the equilibrium constant (Keq) for this reaction: Keq is equal to [SO3]2/[SO2][O2].

Since the concentration of SO3 in this situation is 0.250M at equilibrium, the Keq value is calculated as 0.2502 / (0.500 x 0.400) = 0.4.

Given that the Keq value is more than 1, this indicates that the reaction is marginally biassed in favour of the products.

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The oxidation numbers of the elements show us the number of electrons lost or gained which is traceable from the electron configuration which in turn depends on the group that the atom belongs to.

The oxidation number is the number of charges that an atom appears to have. We know that the elements that we find in the groups  IA through VIA only have a narrow range of oxidation numbers. This is because the oxidation numbers does depend on the number of electrons that the atom can be able to loose or gain at a time.

We know that each of the groups are known by the maximum number of electrons that can be found on the outermost shell of the atom. This is part of the electron configuration of the atom. Thus, if we know the group that an atom belongs to, we can at least tell the outer electron configuration of the atom because we know that all the atoms in that group have the same outer electron configuration.

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To "fix" hydrogen means to convert it from its gaseous form (H₂) into a chemically usable form or compound.

Fritz Haber's method for fixing hydrogen, known as the Haber-Bosch process, involves combining hydrogen (H₂) with nitrogen (N₂) from the air to produce ammonia (NH₃) through a catalytic reaction. This ammonia can then be used to produce fertilizers, explosives, and other important chemicals.

Fritz Haber's method is considered the most important invention of the twentieth century because it revolutionized agriculture and food production. The production of ammonia-based fertilizers made it possible to significantly increase crop yields, addressing global food shortages and supporting a growing population.

This process had a profound impact on global agriculture and played a crucial role in the Green Revolution, which helped alleviate hunger and improved living standards worldwide.

Additionally, the Haber-Bosch process also enabled the production of synthetic materials, such as plastics and fibers, that have transformed various industries and contributed to technological advancements.

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The balanced equation for this reaction is:

CH3CH2CH2OH + C6H5N=C=O → CH3CH2CH2OC(=O)N(C6H5)CH3 + H2O

CH3CH2CH2OH + C6H5N=C=O → CH3CH2CH2OC(=O)N(C6H5)CH3 + H2O

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Answer:

A

Explanation:

the same as an electron

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Prospecting is the process of searching the region for mineral deposits. will likely not be mined at this time, but may be mined one day in the future, either. With some information available about the concentration of the ore.  At this stage, just enough development of the mine site is performed to ensure that it will be

The mass number \(_{17} Cl^{35}\)   is  35.

The mass number  \(_{17} Cl^{37}\)   is  37.

isotopes of \(_{17} Cl^{35}\)   contains. and isotopes   \(_{17} Cl^{37}\) contain.

protons=17                                              protons= 17

neutrons=  18                                          neutrons=20

electrons= 17                                           electrons=17

Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei) and position in the periodic table (and, therefore, belong to the same chemical element). However, isotopes have different nucleon numbers (mass numbers) because they have varying numbers of neutrons in their nuclei. All isotopes of a given element have nearly identical chemical properties but differ in terms of atomic mass and physical characteristics.

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Answer:

The noble gases(neon, helium, argon)

Explanation:

In the ground state, noble gas atom has a completely filled valence electron shell. Space makes up the majority of an atom.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense. In the ground state, noble gas atom has a completely filled valence electron shell.

Therefore, in the ground state, noble gas atom has a completely filled valence electron shell.

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Answer:

about 2 years I think, you might have to ask your dentist

Explanation:

Answer:

it really depens of ur treatment i had braces and it took a year and now i got them again and they say its gonna take a year so it depends on ur treatment

Explanation:

Answer:

Transparent Rock Crystal has many electronic uses; it is used as oscillators in radios, watches, and pressure gauges, and in the study of optics. Quartz is also used as an abrasive for sandblasting, grinding glass, and cutting soft stones.

Explanation:

Answer:

The answer should be A. the mechanism will provide defense against many different types of pathogens :)

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The molecule that is diamagnetic among the options given is N2.

The diamagnetic character of a molecule is determined by the presence of paired electrons in its molecular orbitals. When all the electrons are paired, the molecule is diamagnetic, while when there are unpaired electrons, the molecule is paramagnetic.

Using molecular orbital theory, we can determine the electron configuration of each molecule and predict its magnetic character. In this case, N2 has a bond order of three, indicating a triple bond, and all the electrons are paired, making it diamagnetic.

NO has a bond order of two, with one unpaired electron, making it paramagnetic. F−2 has a bond order of one, with one unpaired electron, making it paramagnetic.

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The empirical formula of the compound obtained from the question given is NaBrO₃

The empirical formula of the compound can be obtained as illustrated below:

Divide by their molar mass

Na = 15.24 / 22.99 = 0.663

Br = 52.95 / 79.90 = 0.663

O = 31.81 / 16 = 1.988

Divide by the smallest

Na = 0.663 / 0.663 = 1

Br = 0.663 / 0.663 = 1

O = 1.988 / 0.663 = 3

Thus, the empirical formula of the compound is NaBrO₃

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Explanation:

zinc nitrate

zn no3

valency :

2 -1

So, zn(no3)2

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.