How to identify a Chemical Property and a Chemical Change?

d. Freezing water!

hope this helps! :3

Final answer:

Correct answer - D, Freezing water. The process with a decrease in entropy is freezing water, as the water molecules become more structured. The freezing process is exothermic, while boiling water is endothermic. The concept of entropy fits within the larger framework of the second law of thermodynamics involving energy transfers.

Explanation:

The process in which there would be a decrease in entropy is D freezing water. Entropy is often associated with randomness or disorder within a system. When water freezes, its molecules become more ordered and structured, which is a transition from a state of higher entropy (liquid water) to a state of lower entropy (ice).

To label the processes as endothermic or exothermic:

a. Water boiling - Endothermic

b. Gasoline burning - Exothermic

c. Ice forming on a pond - Exothermic

The decrease in entropy when water freezes does not violate the second law of thermodynamics because the entropy of the surroundings increases, typically via the release of heat. In thermodynamics, when energy is transferred as heat from one system, the system losing heat decreases in entropy, but the surroundings increase in entropy.

A consumer is an animal that eats other animals. For example, a snake is a consumer.

The slope is 10

And the y-intercept is 1

Hope it helps

Answer:

The answer is Dissemination of components controlled by electron design.  

Explanation:

the Aufbau rule, the Pauli rejection guideline, and Hund's rule,tell you how to discover the electron designs of particles. As indicated by the aufbau standard, electrons possess the orbitals of most reduced vitality first, Pauli-prohibition rule, and Hund's Rule. The electronic setup of cations is doled out by evacuating electrons first in the peripheral p orbital, trailed by the s orbital lastly the d orbitals.

The correct answer is  "microphone - transmitter - radio"

The  order of the technology used to transmit a sound through the radio which makes use of electromagnetic waves  is microphone - transmitter - radio".

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

Learn more about electromagnetic waves,here:

https://brainly.com/question/16515517

#SPJ6

For the first question the answer is

The "s" orbital can only hold a maximum of two electrons. ... Elements in the each group have the same number of valence electrons. Why is hydrogen set apart by itself? Hydrogen does not belong to a single group b/c it can be considered an alkali metal, but it is also a gas.

1. Hydrogen is set apart by itself due to its unique properties that do not fit neatly into any specific group in the periodic table. 2. The alkali metals have similar valence electron configurations, each having one valence electron in their outermost energy level. 3. The alkaline-earth metals are less reactive than the alkali metals because they have two valence electrons in their outermost energy level, requiring more energy to lose them. 4. The transition metals belong to groups 3 to 12 in the periodic table, characterized by partially filled d orbitals in their electron configurations. 5. The halogens, belonging to group 17, share common properties like having 7 valence electrons, high reactivity, and forming acidic compounds when combined with hydrogen.

1. Hydrogen is set apart by itself because it does not fit neatly into any specific group in the periodic table. It has unique properties that are distinct from both the alkali metals and the halogens. While it can form positive ions like the alkali metals, it can also gain an electron to form negative ions like the halogens. Additionally, hydrogen can form covalent bonds with other elements, unlike the alkali metals and halogens. Due to these differences, hydrogen is considered a non-metal and is placed separately at the top of the periodic table.

2. The valence electron configurations of the alkali metals are similar as they all have one valence electron in their outermost energy level. For example, lithium has a valence electron configuration of 2s¹, sodium has 3s¹, potassium has 4s¹, and so on. This single valence electron makes the alkali metals highly reactive, as they readily lose it to form positive ions, achieving a stable electron configuration.

3. The alkaline-earth metals are less reactive than the alkali metals because they have two valence electrons in their outermost energy level. These electrons are held more tightly by the nucleus compared to the single valence electron of alkali metals. As a result, alkaline-earth metals require more energy to lose their valence electrons and become positive ions. While they are still reactive, they are not as reactive as the alkali metals.

4. The transition metals belong to groups 3 to 12 in the periodic table. These elements have partially filled d orbitals in their electron configurations, which gives them unique properties, such as forming colored compounds, being good conductors of electricity, and having high melting and boiling points. They are often used as catalysts in chemical reactions due to their ability to undergo multiple oxidation states.

5. The halogens have several properties in common. They belong to group 17 of the periodic table and have 7 valence electrons in their outermost energy level. Halogens are highly reactive non-metals, and they readily gain one electron to achieve a stable electron configuration. They have high electronegativity, making them strong oxidizing agents. Halogens exist as diatomic molecules in their elemental form (e.g., Cl₂, Br₂, I₂) and have a characteristic color and odor. Additionally, they form acidic compounds when combined with hydrogen, such as hydrochloric acid (HCl) and hydrofluoric acid (HF).

To learn more about valence electron configurations, here

https://brainly.com/question/28977387

#SPJ6

One is the plum pudding theory by Thomsons that theorized that positive and negative charges were randomly distributed in an atom. This was later discovered that the positive charge was located at the small nucleus center of the atoms and negative electrons  on the outside.

Another is the aspect in Bohr model theory that electron orbit the nucleus like planets orbit the sun.  Quantum mechanisms have come to disprove this and identify that electron orbit can only be predicted by probabilities and not in the certainty of their position around the nucleus of the atom. They randomly skip and hop (disappear and reappear) at positions around the nucleus.

Answer:

multiple voltaic cells that have spontaneous half reactions

Explanation:

A battery is an electrochemical device that stores energy. This is connected to an electrical circuit, and chemical energy is transformed into electrical energy. All are similar in construction, each of these cells is composed of a positive and a negative electrode in addition to a separator. When the battery is discharged, an electrochemical change occurs between the different materials in the two electrodes. The electrons are transported between the positive and negative electrodes through an external circuit (light bulbs, starter motors, etc.)

Answer:

i listened to that person ^^^

Explanation:

Edge doesnt give correct answers on unit tests, but i passed with an 88 :)

Answer:

First , second energy levels are complete where as third energy level is not.

Explanation:

Electronic configuration is defined as distribution of electrons of an element in its various energy levels.

Chlorine has an atomic number of 17. Which means that its has 17 proton and 17 electrons.

Electronic configuration of chlorine is given as:

[tex]Cl=1s^22s^2p^63s^23p^5[/tex]

Energy level which fully filled are : 1s , 2s , 2p

Energy level which are not fully filled are : 3s, 3p

First , second energy levels are complete where as third energy level is not.

The chlorine atom has 2 electrons in the 1st energy level, 8 in the 2nd, and 7 in the 3rd. The first two energy levels are full while the 3rd energy level is not full as it could accommodate one more electron.

The electron configuration for a chlorine atom is [Ne] 3s2 3p5. This stands for 1s2 2s2 2p6 3s2 3p5 considering the entire configuration. To calculate the total number of electrons in each energy level, we first need to understand that the number in front of the 's' or 'p' (also 'd' or 'f' in larger atoms) represents the principal quantum number, also known the energy level of the electrons.

So, the total number of electrons for each energy level is as follows:

Now, as we know that the 1st energy level (s-orbital) can hold up to 2 electrons, 2nd level (s and p orbitals) can hold up to 8 electrons, and the 3rd one can hold up to 18 (but due to it being a p-element, chlorine will only use up to 8), we conclude that the 3rd energy level is not full because it has 7 electrons while it could hold at least one more.

https://brainly.com/question/31812229

#SPJ6

First, calculate the molar mass of MgCl2:

Mg: 1 x 24.30 = 24.30

Cl: 2 x 35.45 = 70.9

   24.30 + 70.9 = 95.2g/mol

Mole = Mass / Molar Mass

2.70 moles = Mass / 95.2 g/mol

Mass = 2.70 mol x 95.2 g/mol

Mass = 257.04g

Answer: The mass of magnesium chloride is 257.1 grams.

Explanation:

To calculate the mass of magnesium chloride for given number of moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

We are given:

Moles of magnesium chloride = 2.70 moles

Molar mass of magnesium chloride = 95.21 g/mol

Putting values in above equation, we get:

[tex]2.70moles=\frac{\text{Mass of magnesium chloride}}{95.21g/mol}\\\\\text{Mass of magnesium chloride}=(2.70mol\times 95.21g/mol)=257.1g[/tex]

Hence, the mass of magnesium chloride is 257.1 grams.

The correct explanation is D.

Sodium being an Alkali Metal has a high tendency to lose its only valence electron to attain Neon configuration. In this process, it becomes positively charged, and hence becomes a Cation.

Chlorine is a non-metal that is one electron short of attaining Argon configuration, and hence readily takes the available electrons to become a negatively charged Anion. Since these two are oppositely charged, by the laws of electrostatics, they attract each other forming an Ionic Bond that requires considerable energy to break.

Answer:

the answer is d).

Explanation:

Mendeleev organized his periodic table in order of increasing atomic number in 1869.

Dmitri Mendeleev a Russian chemist organized his periodic table in 1869 by increasing atomic mass not atomic number. The organization by increasing atomic number occurred in the 20th century.

The Russian chemist Dmitri Mendeleev first organized the periodic table in 1869. However, it's important to note that Mendeleev initially arranged the elements based on increasing atomic mass. It was not until the 20th century that the periodic table was arranged by increasing atomic number. Thus Mendeleev himself did not organize the periodic table based on atomic number this happened much later after realization that periodic properties of the elements were better correlated with atomic number rather than atomic mass.

Mendeleev also predicted the existence of elements that were not yet discovered during his time and these elements when discovered followed the properties he had anticipated. This offered great validation to his version of the periodic table.

https://brainly.com/question/31672126

#SPJ3

Answer:

These first and the last are examples of reversible reactions:

Explanation:

The reactions that end in a quasi complete conversion of the reactants into the products are said that are not reversible reactions.

Most of the chemical reactions do not reach a complete conversion. They seem to stop without getting complete conversion. The reason is that these reactions are reversible. A reversible reaction is that that can be forward (direct reaction) and backward (inverse or reverese reaction). In these cases, when the equilibrium is reached the rates of the forward and reverse reactions are equal, which explain why the reaction seems to stop, and a mixture of products and reactants will remain.

The two examples of reversible reactions given may be represented in this way:

The double arrow is used to indicate that the reaction is reversible. In the forward reaction, iodine and chlorine react to form iodine chloride, in the reverse reaction iodine chlorice decomposes to form the substances iodine and chlorine.

In the foward reaction, hydrogen a nitrogen combine to form amonia, in the reverse reaction ammonia decomposes producing the substances hydrogen and nitrogen.

Options 1 & 3 are correct! Thank you

A sulfur atom has two unpaired electrons. Stable electron configurations are those where all electron shells or subshells are filled.

A sulfur atom, which has an atomic number of 16, has 16 electrons. The electron configuration for sulfur is 1s2 2s2 2p6 3s2 3p4. This shows that there are two electrons in the 1s subshell, two in the 2s, six in the 2p, two in the 3s, and four in the 3p. Unpaired electrons are those which occupy an atomic or molecular orbital by themselves, not forming a pair with another electron. In the case of sulfur, all the electrons in 1s, 2s, 2p, and 3s shells are paired. But in the 3p shell, there are four electrons, meaning two of them are unpaired electrons.

The phrase 'stable electron configurations are likely to contain' refers to atoms with fully filled electron shells or subshells. Atoms strive for a stable configuration, which typically means having full outer electron shells. This is the reason that noble gases are unreactive, as they have completely filled shells.

https://brainly.com/question/29157546

#SPJ6

If I am correct it should be nucleons

The collection of protons and neutrons in the center of the atom is called the nucleus.

Answer:

A

Explanation:

i did it on a USA test prep :)

Elements and compounds are examples of pure substances. Elements are made of one type of atom, while compounds consist of two or more types of atoms chemically bonded together.

Elements and compounds are both examples of pure substances.

In summary, matter can be classified into two broad categories: pure substances and mixtures. Pure substances include elements and compounds while mixtures are physical combinations of pure substances.

combination of elements on the periodic table to create a substance. so I think I understand about this okay but I have a 98% on that type of subject

Step 1) Determine the amount of energy the water absorbed, or gained, using q= mc∆T

q=(56g)(4.184 J/g°c)(58.7-25)

q=+7896.0448 J

Step 2) Let's think about what this means. The water must have gained 7896.0448 J of energy because its energy is positive.

This makes sense too, since the temperature of the water increased, and thus it must have gained energy. Knowing this, we can conclude that the metal placed into the water must have released 7896.0448 J of energy.

Since we know the metal released 7896.0448 J of energy, when we solve for the specific heat capacity of the metal, we have to put this number in as negative.

Step 3) Using q= mc∆T, solve for the specific heat capacity of the metal

-7896.0448 J=(26g)(c)(58.7-117)

c=5.209160047 J/g°c

ANSWER: the specific heat capacity of the metal is 5.2 J/g°c

Final answer:

The mass of water produced from the reaction of 3.03 g of butane with excess oxygen is approximately 4.69 grams.

Explanation:

To calculate the mass of water (H₂O) produced from the reaction of butane (C₄H₁₀) with excess oxygen (O₂), we need to use the balanced chemical equation for the combustion of butane:

C₄H₁₀(g) + 6O₂(g) → 4CO₂(g) + 5H₂O(l)

From the balanced equation, we can see that 1 mole of butane produces 5 moles of water. First, we'll need to calculate the number of moles of butane we have:

Butane has a molar mass of 58.12 g/mol (44.10 for carbon + 14.02 for hydrogen), so:

Moles of butane = 3.03 g / 58.12 g/mol ≈ 0.0521 mol

Since 1 mole of butane produces 5 moles of water, the moles of water produced will be:

Moles of H₂O = 0.0521 mol butane x 5 moles H₂O/mol butane = 0.2605 mol H₂O

Finally, we calculate the mass of water produced using the molar mass of water, which is approximately 18.02 g/mol:

Mass of H₂O = 0.2605 mol x 18.02 g/mol ≈ 4.69 g

Therefore, the mass of water produced is about 4.69 g.

The answer is B, protein.

Answer: Option B) is the correct answer.

Explanation:

A polymer is defined as a molecule which has 'n' number of monomer units.

For example, [tex](CH_{2}=CH_{2})_{n}[/tex] is a poly ethene polymer.

Similarly, proteins are also polymers as they are made up of amino acids and contain number of repeated units just like polymers.

Thus, we can conclude that protein is made of polymers.

Hey There!

p-aminophenol (109.13 g/mol) + Ac2O (102.09 g/mol) ---> acetominophen (151.16 g/mol)

next, since you already know your limiting reactant (p-aminophenol), convert it to mols  :

0.130 g / (109.13 g/mol) = 0.00119 moles

now that's your theoretical max, since its a 1:1 mol ratio, so multiply by the new molecular weight. :

0.00119  * 151.16  = 0.180 g

Hope that helps!

The theoretical yield of acetaminophen is equal to 1.19 × 10⁻³ mol.

The amount of a product obtained from a chemical reaction is expressed as the yield of the reaction. The amount of product predicted by stoichiometry is known as the theoretical yield, whereas the actual quantity obtained is called the actual yield.

Given the mass of the p-aminophenol = 0.130 g

The reaction between the p-aminophenol and acetic anhydride gives acetaminophen and acetic acid. As given the acetic anhydride is in excess, therefore, p-aminophenol will decide the amount of acetaminophen.

The molar mass of p-aminophenol = 109.13 g/mol

The number of moles of p-aminophenol = 0.130/109.13  = 1.19 × 10⁻³ mol

Therefore, 1.19 × 10⁻³ mol of acetaminophen will be formed.

The molar mass of the acetaminophen = 151.16 g/mol

The mass of the acetaminophen =  1.19 × 10⁻³ × 151.16 = 0.18 g

Therefore, the theoretical yield of acetaminophen is 1.19 × 10⁻³ moles.

Learn more about theoretical yield, here:

https://brainly.com/question/14966377

#SPJ2

The formula is density = mass / Volume

density = 1.7 g/mL

mass = 95 grams

Volume = ?

1.7 g/mL = 95 g / Volume

Volume = 95 g / 1.7 g/mL

Volume = 55.88 mL

Hope this help!

Where else but from the surroundings?

Answer : For an endothermic reaction the energy come from the surroundings.

Explanation :

Endothermic reaction : It is a type of chemical reaction in which the energy is absorbed by the surroundings. In this reaction, the energy of reactants are less than the energy of products.  The energy of reactant is greater than the energy of product.

Exothermic reaction : It is a type of chemical reaction in which the energy is released into the surroundings. In this reaction, the energy of reactants are more than the energy of products. The energy of product is greater than the energy of reactant.

Hence, the energy come from the surroundings that is needed for an endothermic reaction.

Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type. It is a weighted average that takes into account the abundances of all of the different isotopes

hope this helps :)

The difference between the atomic number and the mass number is atomic number is the total number of protons of an element, and atomic mass is the total number of neutrons and protons.

The atomic number is the nuclear charge number of an element. It is depicted by the total number of protons present in the atoms of the element.

The mass number is also known as the atomic mass number and nucleon number of the element. The total protons and neutrons are the mass numbers.

A mass number, also known as an atomic mass unit, is a measurement of an atom's mass in protons and neutrons. The average mass of all isotopes of a particular kind is known as the atomic mass.

Thus, the total number of protons in an element is represented by the atomic number, whereas the total amount of neutrons and protons is represented by the atomic mass.

To learn more about the atomic number and atomic mass, refer to the link:

https://brainly.com/question/14190064

#SPJ2