qualitatively estimate the relative melting points for each of the solids, and rank them in decreasing order.

Iron l is said to have a high permeability. High coercivity, high retentivity, and high permeability materials make up the permanent magnets. An object made of a substance that has been magnetized and produces its own persistent magnetic field is referred to as a permanent magnet.

In contrast to an electromagnet, which is made of a coil of the wire wrapped around a ferrous core and needs an electric current to create a magnetic field, a permanent magnet's magnetism is "always on" and it creates its own permeability magnetic field. A common example is a refrigerator magnet used to the keep notes on the door of the refrigerator.

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True. Both the [] operator and iterators can be used by programmers to access the elements of a sequence or associative container.

In programming, sequences (such as arrays, vectors, or lists) and associative containers (such as maps or sets) are commonly used to store collections of elements. To access the elements within these containers, programmers have multiple options.

The [] operator is a commonly used method to access elements by their index or key. For sequences, the [] operator allows accessing elements by their position in the sequence using an integer index. For associative containers, the [] operator allows accessing elements by their associated key.

On the other hand, iterators are objects used to traverse and access the elements within a container. They provide a way to sequentially access the elements of a container, allowing operations such as reading, modifying, or deleting elements. By using iterators, programmers can iterate over the elements of a container without relying on specific indices or keys.

Therefore, both the [] operator and iterators provide means for programmers to access the elements of a sequence or associative container, offering flexibility in how the elements can be retrieved and manipulated.

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Answer:

Virus is living due to reproduction and non-living due to crystal appearance.

Explanation:

Characteristics that viruses display is the ability of reproduction in which they increase in population which is a living character and have DNA or RNA which help them to make exact copies of itself. Virus is parasitic in nature because it causes harm to the living host such as humans, animals and plants. Some characteristics that viruses don't display are that they are not like living cells, have no membrane around them, no organelles such as mitochondria, golgi bodies, endoplasmic reticulum and lysosomes etc. Viruses are present in crystal form outside the cell.

The sudden decompression of gases contained within lava results in explosions of rock material to form ashes and cinders., and hence this is true.

When lava reaches the Earth's surface, it experiences a decrease in pressure, also known as decompression.

This decompression causes dissolved gases within the molten rock (lava) to expand rapidly.

As the gases expand, they create a force that can break apart the surrounding rock material, resulting in explosions. These explosions then lead to the formation of fragmented rock particles, such as ashes and cinders.

Ashes are fine, powdery particles, while cinders are larger and more porous.

Both ashes and cinders are common products of volcanic eruptions and can be ejected high into the atmosphere or accumulate near the vent of the volcano.

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To find the value of Kc for the given reaction, we need to use the equilibrium concentrations of the reactants and products.

To find the value of Kc for the given reaction, we need to use the equilibrium concentrations of the reactants and products. The balanced equation tells us that for every 2 moles of NH3 that decompose, 1 mole of N2 and 3 moles of H2 are produced. Therefore, at equilibrium, the concentration of NH3 is 0.12 M, and the concentrations of N2 and H2 are (0.60 - 2x) M and (1.8 - 3x) M, respectively (where x is the amount of NH3 that decomposes in moles).
Using the equilibrium concentrations in the expression for Kc, we get:
Kc = [N2]^1[H2]^3/[NH3]^2
Kc = [(0.60 - 2x) M]^1[(1.8 - 3x) M]^3/[0.12 M]^2
Simplifying this expression and solving for x, we get:
Kc = 4x^2 - 7.5x + 3.12
x = 0.099
Substituting this value of x into the expression for Kc, we get:
Kc = 0.0317 M^-1
So the value of Kc for the given reaction at 850 K is 0.0317 M^-1.

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Answer:

The solution formed is acidic

pH = 0.87

Explanation:

The acid-base reaction of NaOH with HCl is:

NaOH + HCl → NaCl + H₂O

Where 1 mole of NaOH reacts with 1 mole of HCl

In the problem, moles of NaOH and HCl are:

NaOH: 0.0250L × (0.525mol / L) = 0.013125 moles NaOH

HCl: 0.0750 × (0.355mol / L) = 0.026625 moles HCl

As moles of HCl > moles NaOH, HCl is in excess and the solution formed is acidic

Moles in excess of HCl are:

0.026625 moles - 0.013125 moles = 0.0135 moles HCl

As the volume of the solutions is 25.0mL + 75.0mL = 100.0mL = 0.100L, molarity of HCl after reaction is:

0.0135 moles HCl / 0.100L = 0.135M HCl = 0.135M H⁺

As pH is defined as - log [H⁺], pH of the solution is:

pH = -log 0.135M H⁺ = 0.87

pH = 0.87

The pH of the resulting solution of the acid and base mixture is; Acidic with a PH = 0.87

We are given;

Volume of NaOH = 25 mL = 0.025 L

Volume of HCl = 75 mL = 0.075 L

Concentration of NaOH = 0.525 M

Concentration of HCl = 0.355 M

Total volume of solution = 0.025 + 0.075 = 0.1 L

Now, the the equation of the reaction is;

HCl + NaOH = NaCl + H2O

We can see that 1 mole of HCl reacts with 1 mole of NaOH.

Since; number of moles = Volume × concentration

Number of moles of HCl = 0.075 × 0.355

Number of moles of HCl = 0.026625 moles

Similarly;

Number of moles of NaOH = 0.025 × 0.525

Number of moles of NaOH = 0.013125 moles

We can see that the number of moles of HCl is greater than that of NaOH and as such there is excess HCl acid in the mix.

Thus,

Excess moles of HCl acid = 0.026625 - 0.013125

Excess moles of HCl acid = 0.0135 moles

Concentration of this excess HCl is gotten by the formula;

M = Excess moles/total volume

M = 0.0135/0.1

M = 0.135 M

PH of this excess concentration is;

PH = -log [H+]

PH = -log [0.135]

PH = 0.87

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Answer:

3

Explanation

it is 3

The picture below represents atoms with a covalent bond. Option B is the correct answer.

In order to maintain stability, covalent bonds, a particular kind of chemical link, form between hydrogen atoms, nonmetals, and semimetals. The exchange of one or more pairs of electrons between two atoms forms a covalent connection. The two atomic nuclei are drawing these electrons in unison.

When there is insufficient space between two atoms' electronegativities for an electron transfer to take place and create ions, a covalent bond is formed. In organic chemistry, covalent bonds predominate over ionic bonds by a wide margin.

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The complete question is:

Look at the picture below.

What does this picture represent?

A. Atoms that are ions

B. Atoms with a covalent bond

C. Atoms with no bond

D. Atoms with

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.

Answer:

It doesn't have measure marks on it.

Answer:

However, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid. Which conclusion best fits her observations? The mixture is a solution because it has the same appearance throughout the sample

pls mark me the brainliest

Answer:

14660.75 kJ.

Explanation:

We are given from the question above that the pressure inside is represented by this equation:

P = Po + C(1-(D1/D))(D1/D).

Thus, P = 100 + C (1 - 1/4) (1/4). Therefore, P  which is = 400 is;

400 = 100 + C (1 - 1/4) (1/4).

Hence, C = 1600. And the equation can be written as P = 100 + 1600 (1 - (D1/D))(D1/D).

The work done during the entire process, w = (work done during the process 1 to 2) + (work done duringbthe process 2 to 3 ).

Therefore, work done during the process 1 to 2 = P(V2 + V1) = 100( π/6 - 0).

{NB: V2 is gotten from π/6 × D^3. Where D^3 = 1. }

Hence, work done during the process 1 to 2 = 52.36 kJ.

So, the work done duringbthe process 2 to 3 ) is going to be the integration of PdV. Where P = 100 + 1600 (1 - (D1/D))(D1/D) and dV = π/2 D^2 dD. Taking the upper and the lower limit as 4 and 1 respectively.

After the integration (kindly check attached picture for the process) the work done duringbthe process 2 to 3  = 14.61 × 10^3 kJ.  

Therefore, The work done during the entire process, w = (work done during the process 1 to 2) + (work done duringbthe process 2 to 3 ).

The work done during the entire process, w = 52.36 kJ + 14.61 × 10^3 kJ.   = 14660.75 kJ.

Explanation:

We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.

a) Carbon-14:

By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.

atomic number = n° of protons

mass number = n° of protons + n° of neutrons

n° of protons = atomic number

n° of neutrons = mass number - n° of protons

n° of neutrons = mass number - atomic number

If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.

In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.

n° of protons = atomic number = 6

n° of protons = 6

n° of neutrons = mass number - atomic number = 14 - 6

n° of neutrons = 8

b) Cobalt-60:

atomic number = 27 (from the periodic table)

mass number = 60

n° of protons = atomic number = 27

n° of protons = 27

n° of neutrons = mass number - atomic number = 60 - 27

n° of neutrons = 33

c) Gold-197:

atomic number = 79 (from the periodic table)

mass number = 197

n° of protons = atomic number = 79

n° of protons = 79

n° of neutrons = mass number - atomic number = 197 - 79

n° of neutrons = 118

d) Uranium-235:

atomic number = 92 (from the periodic table)

mass number = 235

n° of protons = atomic number = 92

n° of protons = 92

n° of neutrons = mass number - atomic number = 235 - 92

n° of neutrons = 143

Answer:

a) Carbon-14: n° of protons = 6 n° of neutrons = 8

b) Cobalt-60: n° of protons = 27 n° of neutrons = 33

c) Gold-197: n° of protons = 79 n° of neutrons = 118

d) Uranium-235: n° of protons = 92 n° of neutrons = 143

Answer:

chemical

Creatine Phosphate (with oxygen) So all muscle cells contain a high-energy compound called creatine phosphate which is broken down to make more ATP quickly. Creatine phosphate can supply the energy needs of a working muscle at a very high rate, but only for about 8–10 seconds.adenosine triphosphate (ATP)

The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body's biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells

Answer:

8x8 Inc. is a provider of Voice over IP products. 8x8 products include cloud-based voice, contact center, video, mobile and unified communications for businesses.

Explanation:

The relationship between the reaction quotient (Q) and the equilibrium constant (K) can determine the direction of a reaction.

If Q is less than K, it means that there are more reactants than products and the reaction will proceed in the forward direction to reach equilibrium. On the other hand, if Q is greater than K, there are more products than reactants and the reaction will proceed in the reverse direction to reach equilibrium. If Q is equal to K, it means that the concentrations of reactants and products are at equilibrium and the reaction is in a state of dynamic equilibrium where the rates of the forward and reverse reactions are equal. Therefore, the direction of the reaction depends on the relative concentrations of reactants and products, as determined by the reaction quotient and the equilibrium constant.

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Given :

Formula applied :

\(\boxed {Q = mc \triangle T}\)

Let's solve for c !

⇒ 237,000 = 20 × c × 15

⇒ c = 237,000 ÷ 300

⇒ \(\boxed {c = 790 J kg^{-1} K^{-1}}\)

∴ The specific heat capacity of granite is 790 J kg⁻¹ K⁻¹.

Explanation:

charged particles=8 which is proton and proton=no.of electron. That's why 8 particles are revolving round this center. And this atom structure is of oxygen

If the center of an atom has 8 charged particles that are protons as the neutrons are neutral there will be 8 negative charges that are electrons revolving around the center nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether it is  solid,liquid or  gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged particles  and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged  particles and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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This peptide is positively charged at physiological pH. In conclusion, SDEKAINVKWQLA and SDEKAINVKWQHA are neutral at physiological pH, SEERAINVAWQHA is negatively charged, and SDEK is positively charged.A peptide is a short chain of amino acids that are joined together with peptide bonds.

The nature of a peptide's charge depends on the overall charges of the amino acids in the sequence. At physiological pH, amino acids will either be positively charged, negatively charged, or neutral, depending on their side chains. Let's examine the peptides provided to determine their charges at physiological pH:SDEKAINVKWQLA: This peptide contains a mix of amino acids with positively charged, negatively charged, and neutral side chains. However, the positively charged amino acid (lysine) and the negatively charged amino acid (aspartic acid) are present in equal amounts.

Therefore, this peptide is considered neutral at physiological pH.SDEKAINVKWQHA: This peptide is similar to the first one but has one less amino acid (alanine instead of leucine at the end). It contains the same number of positively charged and negatively charged amino acids, and so it is also neutral at physiological pH.SEERAINVAWQHA: This peptide contains three negatively charged amino acids (aspartic acid and glutamic acid) and only one positively charged amino acid (lysine). Therefore, the peptide overall is negatively charged at physiological pH.SDEK: This peptide contains both positively charged (lysine) and negatively charged (aspartic acid) amino acids. However, there are more positively charged amino acids in the peptide than negatively charged ones.

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The formula mass of potassium chlorate (\(KCIO_3\)) is 170.55 g/mol.

Add the atomic masses of all the atoms in the compound according to their respective subscripts in order to determine the formula mass, sometimes referred to as the molar mass or molecular weight, of a compound.

The periodic table lists the atomic masses of the elements. The atomic masses of the constituent components in potassium chlorate (\(KCIO_3\)) are as follows:

Potassium's (K) atomic weight is 39.10 g/mol.

Chlorine's (Cl) atomic weight is 35.45 g/mol.

Oxygen's atomic mass (O) is 16.0 g/mol.

Let's now compute the potassium chlorate (KCIO3) formula mass:

Formula mass = (K atomic mass) + (Cl atomic mass) + 3 x O atomic mass

= 39.10 g/mol + 35.45 g/mol + 3 x 16.00 g/mol

= 39.10 g/mol + 35.45 g/mol + 48.00 g/mol

= 122.55 g/mol + 48.00 g/mol

= 170.55 g/mol

Therefore, the formula mass of potassium chlorate (KCIO3) is 170.55 g/mol.

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The four complementary characteristics of colligative properties that a solution can display are an increase in boiling point, a decrease in freezing point, a relative decrease in vapor pressure, and an increase in osmotic pressure.

What are colligative properties?

Some characteristics of diluted solutions containing non-volatile solutes depend only on the quantity of solute particles present and not on the solute type. Collaborative qualities are what these traits are known as. Most frequently, diluted solutions exhibit these characteristics.

Collaborative properties can also be defined as those that result from the dissolution of a non-volatile solute in a volatile solvent. Typically, the solute alters the characteristics of the solvent by removing some of the solvent molecules from the liquid phase. Additionally, the concentration of the solvent is reduced as a result of this.

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Decomposition is the process of breakdown of complex organic matter into inorganic substances like carbon dioxide, water, and nutrients.

Decomposition or rot is the process by which dead organic substances are broken down into simpler organic or inorganic matter such as carbon dioxide, water, simple sugars, and mineral salts. The process is a part of the nutrient cycle and is essential for recycling the finite matter that occupies physical space in the biosphere.

Organisms that are responsible for the decomposition process are called decomposers. Most of the decomposers are microorganisms that cannot be seen through human eyes, like bacteria, some fungi, etc., but some decomposers are big enough that can be seen through human eyes.

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Calculate the mass, in amu, of 278 atoms of Li.

1) We need to find Li (Lithium) in the periodic table.

1) The atomic mass of Lithium is 6.94 u.

2) We can cancel some units and rearrange the equation.

3) Multiply the equation above by the number of atoms

The mass of 278 atoms of Lithium is 3.20*10^-21 u

C. 0.1 M barium chloride following would produce maximum elevation in boiling point

Because both the hydroxyl and carboxylic acid groups might take part in intermolecular hydrogen bonding, compound IV would have the greatest boiling point. Additionally, compound IV exhibits stronger dipole-dipole attraction due to its increased polarity (more polarized carbon-oxygen bonds).

The element with the lowest temperature at which an element would smolder is helium, while the element with the highest temperature is tungsten. The melting point is measured in degrees Celsius (C).

The most particles will be produced by BaCl2 after dissociation. Consequently, it causes the greatest rise of boiling point.

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Answer:

acid +base gives salt and water

acid and carbon gives salt and water and carbon dioxide

acid and metal gives salt and hydrogen

i. Dissociate in solution: Electrolytes

ii. Do not dissociate in solution: Non-electrolytes

iii. Conduct electricity in solution: Electrolytes

iv. Do not conduct electricity in solution: Non-electrolytes

i. Dissociate in solution: Electrolytes are substances that dissociate into ions when dissolved in water or other solvents. This dissociation allows them to conduct electricity in solution.

ii. Do not dissociate in solution: Non-electrolytes are substances that do not dissociate into ions when dissolved in water or other solvents. They remain as intact molecules and do not conduct electricity.

iii. Conduct electricity in solution: Electrolytes, by definition, are substances that dissociate into ions in solution. These ions are charged particles that can move and carry electric current, allowing electrolytes to conduct electricity.

iv. Do not conduct electricity in solution: Non-electrolytes do not dissociate into ions in solution, so they do not have charged particles that can carry electric current. As a result, non-electrolytes do not conduct electricity in solution.

In summary, electrolytes dissociate in solution and conduct electricity, while non-electrolytes do not dissociate and do not conduct electricity in solution.

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Answer:Answer:

40-18 fl =>40-cl+cl+0-1e sorry if im rong

Explanation:

When \(^1^8F\) undergoes positron emission, the product nucleus is, \(^1^8O\).

In positron emission, also called positive beta decay (β+ decay), a proton in the parent nucleus decays into a neutron that remains in the daughter nucleus, and the nucleus emits a neutrino and a positron, which is a positive particle like an ordinary electron in mass but of opposite charge.

When a proton is converted into a neutron then the positron emission takes place as follows.

\(^1_1p\;\rightarrow\;^1_0n\;+\;^0_+1e\)

A positron is represented by the symbol. Therefore, when a positron emission occurs then the resultant nuclei atomic number decreases by a unit mass.

The general equation representing positron emission is as follows.

\(^M_ZA\;\rightarrow\;^M_Z_-_1 B\;+\;^0_+1e\)

Hence, fluorine-18 decays by positron emission as follows.

\(^1^8_9F\;\rightarrow\;^1^8_8n\;+\;^0_+1e\)

Therefore, when \(^1^8F\) undergoes positron emission, the product nucleus is, \(^1^8O\).

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The total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol is 300.0036 mL.

To calculate the total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol, multiply the volume of the liquor with the percent volume % (v/v):

Total volume of ethanol = Volume of liquor × % (v/v) ethanol

First, convert 25.4 fl. oz to mL.

1 fl. oz = 29.5735 mL

Therefore, 25.4 fl. oz = 25.4 × 29.5735 = 750.0089 mL

Using the formula above,

Total volume of ethanol = Volume of liquor × % (v/v) ethanol = 750.0089 mL × 40 / 100 = 300.0036 mL

Therefore, the total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol is 300.0036 mL (approximately 300 mL).

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Answer:

Explanation:

I did this class yesterday give me like 10min imma find my anwsers