If you change peanuts into peanut butter is it a chemical or a physical change

answer is D.........

Answer:

Q = 30.90 kJ, W = 12.36 kJ, ΔE = 18.54 kJ.

Explanation:

The expansion is happening at constant pressure without a phase change, thus, the heat can be calculated by:

Q = n*c*ΔT

Where n is the number of moles, c is the molar heat capacity, and ΔT is the temperature variation (final - initial), thus:

Q = 39.1*20.8*(38.0 - 0.0)

Q = 30904.64 J

Q = 30.90 kJ

The work done by a expansion at constant pressure is:

W = P*ΔV

Where P is the pressure (1 atm = 101325 Pa), and ΔV the volume variation (final - initial). Vfinal = 998 L = 0.998m³, Vinitial = 876 L = 0.876 m³.

W = 101325*(0.998 - 0.876)

W = 12361.65 J

W = 12.36 kJ

By the first law of the thermodynamics, the variation of the internal energy ΔE is:

ΔE = Q - W

ΔE = 30.90 - 12.36

ΔE = 18.54 kJ

Final answer:

To convert 709 mm Hg to cm H₂O, first convert mm Hg to cm Hg and then multiply by 13.6 to account for the difference in density, resulting in a barometric pressure of 964.24 cm H₂O.

Explanation:

To convert the pressure reading from a mercury barometer (mm Hg) to a water barometer reading (cm H₂O), we need to use the ratio of densities of mercury and water. Given that the density of mercury is approximately 13.6 times greater than the density of water, we can calculate the height of the water column that would exert the same pressure as the mercury column.

First, we convert the given pressure in mm Hg to cm Hg since the resulting pressure in water is to be found in cm H₂O. We know that 1 cm Hg = 10 mm Hg, so we have:

709 mm Hg * (1 cm Hg / 10 mm Hg) = 70.9 cm Hg

Now, to convert to cm H₂O, since the density of mercury is 13.6 times that of water, a column of water will need to be 13.6 times higher than a mercury column to exert the same pressure. Therefore:

Barometric pressure = 70.9 cm Hg * 13.6 = 964.24 cm H₂O

The barometric pressure in cm H₂O is 964.24 cm.

Final answer:

C4H6Br2 has 12 valence electrons.

Explanation:

Each hydrogen atom (group 1) has one valence electron, carbon (group 14) has 4 valence electrons, and oxygen (group 16) has 6 valence electrons, for a total of [(2)(1) + 4 + 6] = 12 valence electrons.

Organic compounds typically contain carbon and hydrogen, forming diverse structures and are prevalent in living organisms, while inorganic compounds may not contain carbon and are often salts, metals, and other elements. There are exceptions to the classification, but this distinction is based on the vast majority of known compounds.

Inorganic and organic compounds differ mainly in their composition and structure. Organic compounds contain carbon atoms and, typically, hydrogen atoms, forming the backbone of the compound. These compounds participate in diverse chemical reactions and are found in all living organisms. Examples of organic compounds include hexane (C6H14) and other carbon-based molecules.

Inorganic compounds, on the other hand, often lack carbon and hydrogen as a part of their primary structure. They include metals, salts, and other elements. A common example is sodium chloride (NaCl), also known as table salt, which is classified as inorganic.

It is important to note that while organic chemistry focuses on carbon compounds, inorganic chemistry is dedicated to the study of all other elements, which is reasonable given the vast majority of characterized compounds are carbon-based. Despite the basic classification, there are exceptions, such as carbon oxides and carbonates, which are considered inorganic despite containing carbon because they do not contain hydrogen.

The strength of the bond holding atoms together determines the hardness of a mineral. Water glass has stronger bonds.

An enduring attraction between atoms or ions known as a chemical bond is what allows molecules and crystals to form. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic attraction of two oppositely charged ions, as in ionic bonds.

Covalent bonds are more powerful than ionic connections because of the close sharing of pairs of electrons (one electron from each of two atoms).

The strongest bindings found in nature are covalent bonds, which require the assistance of enzymes to be broken under normal biological circumstances. This is because the linked atoms share electrons equally, and when something is equally shared, there is never a conflict that could undermine the arrangement.

Thus, Water glass has stronger bonds.

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Final answer:

The correct electron configuration for carbon is 1s²2s²2p², with two unpaired electrons in separated 2p orbitals, following Hund's rule and the Pauli exclusion principle.

Explanation:

The correct electron configuration for carbon is 1s²2s²2p². Carbon has an atomic number of 6, meaning it has six electrons. Two electrons fill the 1s orbital, the next two fill the 2s orbital, and the remaining two are found in the 2p orbital. According to Hund's rule, the lowest-energy configuration for an atom with electrons within a set of degenerate orbitals is that with the maximum number of unpaired electrons. Therefore, carbon has two unpaired electrons in the 2p orbital, with one electron in each of the two 2p orbitals that have the same n, l, and m₀ quantum numbers, but different ms quantum numbers, adhering to the Pauli exclusion principle. In its valence shell, carbon has an electron configuration of 2s²2p², which is similar to other elements in the same column of the periodic table.

Answer:

The mass and atomic number

Explanation:

There are two numbers that are written in front of the symbol. The mass number (written above) and the atomic number (written below). In mass number is equal to the sum of protons and neutrons, the atomic number is equal to the number of protons in the nucleus. The unstable nuclei are due to excess of protons or neutrons. Radioactive atoms tend to emit them intermittently and randomly.

Answer:

Amount of mercury is 1.0*10⁻⁵ g

Explanation:

Given:

Mercury content of stream = 0.68 ppb

volume of water = 15.0 L

Density of water = 0.998 g/L

To determine:

Amount of mercury in 15.0 L of water

Calculation:

[tex]1 ppb = \frac{1\mu g(solute)}{1L(solvent)}[/tex]

where 1 μg (micro gram) = 10⁻⁶ g

0.68 ppm implies that there is 0.68 *10⁻⁶ g mercury per Liter of water

Therefore, the amount of mercury in 15.0 L water would be:

[tex]=\frac{0.68*10^{-6}g\ Hg* 15.0\ L\ water}{1\ L\ water} =1.02*10^{-5}g[/tex]

Twelve protons and ten electrons make up a magnesium ion. Mg contains 12 protons, since it has an atomic number of 12. Next, we'll examine the charge, which is 2+.

The short answer is that it has an almost empty “outer shell.” From the nucleus, the outer electrons are far away. The inner electrons partially “shield” them from the nucleus's attraction.

Magnesium, It, is a good electrical conductor. The element magnesium is electropositive. Magnesium has a low enthalpy of ionization. Magnesium oxide is a simple basic oxide because it contains oxide ions.

When it mixes with water, it creates a basic called magnesium hydroxide.

Magnesium produces hydrogen gas and magnesium hydroxide when it combines with heated water or water vapor.

Therefore, Magnesium contains 12 protons and 10 electrons after loosing 2 electrons.

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Answer 1. mixture C is a heterogeneous solution.

This is because heterogeneous solution :

Answer 2. mixture B is a solution.

Solutions are homogeneous solution and homogeneous solution:

true

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Dipeptide is shaped when two amino acids are consolidated by a substance bond called peptide bond. R gathering or "variable gathering" speaks to the side chain on the amino corrosive and this recognizes the assortment of a specific amino corrosive among others.  

Further Explanation:  

first amino acids shaped:  

The manner in which amino acids are integrated has changed during the historical backdrop of Earth. The Hadean age speaks to the time from which Earth initially shaped. The consequent Archean age (around 3,500 million years back) is known as the period of microbes and archaea.  

amino acids begin:  

Fundamental amino acids can't be made by the body. Accordingly, they should originate from sustenance. The 9 basic amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.  

amino acids prove evolution:  

That two species and their normal predecessor have comparative DNA is solid proof supporting development. Protein amino corrosive groupings can likewise be utilized to analyze similitudes between species. Proteins are produced using amino acids and the grouping of these amino acids is constrained by qualities.  

Variable grouping:

A gathering variable (likewise called a coding variable, bunch variable or by factor) sorts information inside information records into classes or gatherings. It tells a PC framework how you've arranged information into gatherings. All out factors: a class like "Male" or "Female" and "Control Group" or "Trial Group."

Subject: chemistry

Level: High School

Keywords: first amino acids shaped, amino acids begin, amino acids prove evolution,  Variable grouping.  

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A mole is the amount of substance that contains as many elementary chemical units as present in 12 gram of Carbon 12. 79.707 mole of Tungsten contains [tex]\bold{ 4.8 \times 10^2^5}[/tex]

Mole:

It is the quantity of substance that contains as many elementary chemical units as present in 12 gram of Carbon 12.

[tex]\bold{1mole = 6.02 \times 10^2^3}[/tex]

Number of mole [tex]\bold{ = \frac{ 4.8 \times 10^2^5 }{6.02\times 10^2^3} }[/tex]

Number of moles = 79.707 mole  

Hence, we can conclude that  79.707 mole of Tungsten contains [tex]\bold{ 4.8 \times 10^2^5}[/tex] atoms.

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To find the number of moles in 4.8 × 1025 atoms of tungsten, you divide the number of atoms by Avogadro's number, which results in 79.73 moles of tungsten.

To determine the number of moles in 4.8 × 1025 atoms of tungsten, we use the concept of Avogadro's number. Avogadro's number (6.02 × 1023 atoms/mol) is the number of atoms in one mole of any substance. Therefore, the conversion factor from atoms to moles is 1 mole/6.02 × 1023 atoms.

The calculation would be as follows:

Therefore, the number of moles of tungsten is given by:

(4.8 × 1025 / 6.02 × 1023) moles = 79.73 moles

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Ionic compounds are those compounds which form an ion or dissociates into ions when placed in a solution. These compounds are made up of a metal and non metal. From the choices, here are the ionic compounds:

na2so4

h2so4

cacl2

ca3(po4)2

There are four major components found in wood, and these are:

cellulose

lignin

starch

protein

Among the four, I believe that cellulose and lignin are the most difficult to degrade because they contain large amount of cross-linked heavy hydrocarbons.

Answer:

cellulose

lignin

The name for the set of rules based on mathematical proportions controlling artistic creation is called 'the canon'. It provides a standard of beauty for artists and has been influential from ancient times to the Renaissance and beyond.

The set of rules, based on precise mathematical proportions, imposing strict controls on the artistic process and the appearance of the images created, is known as the canon. This concept has roots in ancient histories and practices, such as those of the Pythagoreans, ancient Egyptians, and was notably explored during the Renaissance by Leonardo da Vinci with the Vitruvian Man. A canon operates as a standard of beauty, guiding artists in achieving a harmonious balance and proportion in their work, whether it's in paintings, sculptures, or architecture. While artists like Zuccaro and Danti debated the application of mathematical proportions and an absolute canon, they recognized the importance of understanding these principles. Thus, even those who were naturally gifted in the arts could enhance their work through knowledge of the canon, and those not born to it could learn and apply these principles to achieve artistic standards.