calculate amount of heat needed to compeltely vaporize a 1.5 mol sample of liquid chloroform originally at --60

The period that an element is in tells the number of electrons shells normally possessed by an atom.

An electron is a negatively charged subatomic particle that can be either sure to an atom or loose. An electron that is sure to an atom is one of the three number one types of debris in the atom the opposite  are protons and neutrons.

Electrons are the smallest of the debris that make up an atom, and they bring a bad price. The variety of protons and electrons is equal in a impartial atom. The hydrogen atom, as an instance, has just one electron and one proton.

Atoms are constructed of two sorts of elementary particles: electrons and quarks. Electrons occupy a space that surrounds an atom's nucleus. each electron has an electrical charge of -1. Quarks make up protons and neutrons, which, in turn, make up an atom's nucleus.

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The word problem format to the task given above is: When magnesium reacts with steam, it produces magnesium hydroxide and liberate hydrogen gas.

It happens that magnesium is an alkali earth metal and react with water in the gaseous state to librate hydrogen gas, when this reaction occurs, it results in the formation of magnesium hydroxide.

The chemical equation between magnesium and water is given below:

Mg + 2H₂O -----> Mg (OH)₂ + H₂

So therefore, we can accurately deduced that magnesium hydroxide is produced when magnesium is disolved in water.

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The solubility of lead(II) chloride is 0.45 g/100 mL of solution. The value of  \(K_{sp}\) of \(PbCl_{2}\)  is 1.7×\(10^{-5}\) .

So, option C is correct one.

Calculation,

Number of moles of \(PbCl_{2}\)  = mass/molar mass = 0.45/278.1 = 1.618×\(10^{-3}\) moles

Concentration of \(Pb^{+2}\) and \(Cl^{-}\) ion

Molarity  of \(Pb^{+2}\) = Number of moles of solute /volume in lit

Molarity  of \(Pb^{+2}\) = 1.618×\(10^{-3}\) moles /0.1 lit = 0.0162 M

\(PbCl_{2}\) →  \(Pb^{+2}\) +  2\(Cl^{-}\)

For certain amount of  \(Pb^{+2}\) , twice this amount of  \(Cl^{-}\) ion formed.

The concentration of   \(Cl^{-}\) ion formed = 2× 0.0162 M = 0.0324 M

Now,

The solubility of lead(II) chloride of solution = 0.45 g/100 mL

\(K_{sp}\) of \(PbCl_{2}\) = [ \(Pb^{+2}\) ]\([Cl^{-}]^{2}\) = 0.0162 ×\([0.0324 ]^{2}\) =  1.7×\(10^{-5}\) .

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The interaction between lipids and water is unique due to the hydrophobic nature of lipids and the polar nature of water molecules.

Lipids are a class of organic molecules that are insoluble or poorly soluble in water but are highly soluble in nonpolar solvents such as organic solvents.

This property arises from the hydrophobic nature of lipids, meaning they have an aversion to water.

Lipids are composed mainly of hydrocarbon chains, which are nonpolar and do not form favorable interactions with polar water molecules.

Water, on the other hand, is a polar molecule composed of two hydrogen atoms and one oxygen atom.  It has a bent molecular shape, with the oxygen atom being more electronegative than the hydrogen atoms.

This creates a partial negative charge on the oxygen atom and partial positive charges on the hydrogen atoms. The polarity of water molecules allows them to form hydrogen bonds with each other and with other polar molecules.

When lipids are introduced into water, they aggregate and form structures such as micelles, liposomes, or lipid bilayers.

This aggregation occurs to minimize the contact between the hydrophobic lipid tails and the surrounding water molecules.

In the case of lipid bilayers, which are the primary component of cell membranes, two layers of lipid molecules align with their hydrophilic heads facing the water and their hydrophobic tails oriented away from the water, forming a stable barrier.

The interaction of lipids and water is special due to the hydrophobic nature of lipids and the polar nature of water molecules.

Lipids tend to aggregate and form structures to minimize their contact with water, while water molecules form hydrogen bonds with each other and other polar molecules.

This unique interaction is essential for the formation and stability of biological membranes, which play a crucial role in cell structure and function.

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Answer:

40.0 L

Explanation:

The formula to find the new pressure: \(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\)

P₁ = 15.0 L

V₁ = 2 atm

T₁ = 300 K (Convert Celsius to Kelvin by adding 273)

P₂ = 1

V₂ = ?

T₂ = 400 K

\(\frac{(2)(15)}{300} = \frac{P_2(1)}{400}\)

\(\frac{30}{300} = \frac{P_2}{400}\)

\(\frac{1}{10} = \frac{P_2}{400}\)

Multiply both sides by 400 to isolate the P₂

\(\frac{400}{10} = P_2\)

\(P_2 = 40\)

Answer:

thank you for this oibnki

Answer:

Sure I'll go ahead and like your answers and follow you if that's what you wanted! :)

Explanation:

The simplest straight-chain alkynes containing seven to twelve carbons are:

1. Heptyne (7 carbons)

2. Octyne (8 carbons)

3. Nonyne (9 carbons)

4. Decyne (10 carbons)

5. Undecyne (11 carbons)

6. Dodecyne (12 carbons)

Here are the structures and names of the simplest straight-chain alkynes containing seven to twelve carbons:

1. Heptyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Heptyne

2. Octyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Octyne

3. Nonyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Nonyne

4. Decyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Decyne

5. Undecyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Undecyne

6. Dodecyne:

  Structure: H-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-C≡C-H

  Name: 1-Dodecyne

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Answer:

It is A, A solution with as much dissolved solute as it can hold at a given temperature.

Explanation:

A saturated solution may be characterized as a solution with as much dissolved solute as it can hold at a given temperature. Thus, the correct option for this question is A.

The characteristics of the saturated solution are as follows:

According to the context of this question, a solution that holds less dissolved solute than is possible at a given temperature represents the properties of an unsaturated solution that does not form any kind of bubbles. For example, sodium chloride in water.

Therefore, a saturated solution may be characterized as a solution with as much dissolved solute as it can hold at a given temperature. Thus, the correct option for this question is A.

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The concentration of the H₃PO₄ solution is 0.555 M.

To determine the concentration of the H₃PO₄ solution, we can use the equation:

M(acid) × V(acid) = M(base) × V(base)

where M is the molarity, and V is the volume in milliliters (mL). We are given the volume of NaOH used (29.2 mL) and its concentration (0.738 M). The stoichiometry of the reaction tells us that 3 moles of NaOH are needed to react with 1 mole of H₃PO₄.

Therefore, we can write:

M(H₃PO₄) × 25.0 mL = 0.738 M NaOH × 29.2 mL × (1 mol H₃PO₄/3 mol NaOH)

Solving for M(H₃PO₄), we get:

M(H₃PO₄) = (0.738 M NaOH × 29.2 mL × (1 mol H₃PO₄/3 mol NaOH)) / 25.0 mL

M(H₃PO₄) = 0.555 M

Therefore, the concentration of the H₃PO₄ solution is 0.555 M.

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Therefore, the temperature change of the pure gold coin is approximately 59.66 degrees Celsius.

To calculate the temperature change, we can use the formula:

q = m * c * ΔT

where q is the heat added, m is the mass of the gold coin, c is the specific heat capacity of gold, and ΔT is the change in temperature.

Given that q = 84 J, m = 11 g, and c = 0.128 J/g∘C, we can rearrange the formula to solve for ΔT:

ΔT = q / (m * c)

Substituting the given values:

ΔT = 84 J / (11 g * 0.128 J/g∘C)

Simplifying the expression:

ΔT = 84 J / 1.408 J/∘C

ΔT = 59.66 ∘C

Therefore, the temperature change of the pure gold coin is approximately 59.66 degrees Celsius.

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Conductors

Silver

Gold

Copper

Aluminum

Mercury

Steel

Iron

Seawater

Concrete

Mercury

___________________

insulators

Aluminum foil

Glass

Air

Plastic

Rubber

Porcelain

Wood

Answer: 27

Explanation: multiply 3.0 3 times

Answer:

the action or process of filtering something. hope this helps :D

The molecular weight of gas X would be 23.36 g/mol.

According to Graham, the rate of effusion of gases is inversely proportional to the square root of their molecular weights.

Graham's law can be mathematically expressed as:

\(r_1/r_2\) = \(\sqrt{\frac{m_2}{m_1} }\)

Where \(r_1\) and \(r_2\) are rates of diffusion or effusion of gases 1 and 2, and \(m_1\) and \(m_2\) are their molecular weights respectively.

In this case, \(r_x\) = \(2.5r_{SF6}\) and the molecular weight of Sf6 is given as 146 g/mol. Thus:

2.5 = \(\sqrt{\frac{146}{m_x} }\)

6.25 = 146/\(m_x\)

\(m_x\) = 146/6.25

      = 23.36 g/mol

In other words, the molecular weight of gas X would be 23.36 g/mol.

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Answer:

Excluding hydrogen in group 1, metals

Explanation:

All the elements from group 1 to 12, excluding hydrogen at the top of group 1 are all metals

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

Presence of an Electrolyte

Metal Surface

Oxygen or Other Oxidizing Agent

Difference in Potential

Electrochemical Pathway

Explanation:

To verify that you produced carbon dioxide in your combustion reaction, you would need to perform a series of tests. First, you could observe the reaction for the formation of a gas, which in this case would be carbon dioxide.

You could also perform a test for carbon dioxide using a limewater solution, which will turn cloudy in the presence of carbon dioxide gas. Another method is to use a pH indicator, as carbon dioxide will react with water to form carbonic acid, which will lower the pH of the solution. Finally, you could collect the gas produced in the reaction and test it using infrared spectroscopy to confirm the presence of carbon dioxide.

Overall, there are several ways to verify the production of carbon dioxide in a combustion reaction, each with its own advantages and disadvantages, but they all require as they involve multiple steps and methods.

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Answer:

d - Meteor: A streak of light made when an object burns up as it enters earth’s atmosphere

Explanation:

The best description of what Jackson saw is a meteor which is a streak of light made when an object burns up as it enters earth's atmosphere.

A meteor is made up of rocky and sometime iron mass. They are believed to have formed since the early formation of the earth.

Answer:

B.

Copper and zinc mix to make brass.

Explanation:

This is the only answer in which a new substance is created, the rest of the choices are just mixtures

Answer:

One plate is going underneath the other plate and sinking into soft rock below.

Explanation:

Tectonic plates will move each other to form rocks and mineral layers. The correct diagram which showing the result of two tectonic plates to each is diagram C.  One plate is going underneath the other plate and sinking into the soft rock below.

Earth's  lithosphere composed of tectonic plates of different sizes and shapes. These plates move away or each other results in the formation of soft rocks and mineral layers.

The magma inside the mantle of earth crust become hot fluid by convection and it flows out. This flow of magma creates slight movement in tectonic plates finally they move in different directions.

The rocks in earth crust will undergoes weathering and results in sand formation. The boundaries of the tectonic plate will be different in different regions and characteristics of that region depends on the type of boundary such as presence of islands volcanoes etc.

When two tectonic plates moves each other one  plate is going underneath the other plate and sinking into the soft rock below. Hence, option C correct.

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Your question is incomplete. But your complete question probably was:

Dr. Steiner and her team have been using GPS to track two plates that are moving toward each other. Which diagram shows what is happening at the place where the plates are moving toward each other?

Diagram A: Two plates are hitting each other, and the plates are breaking into pieces, creating sand.

Diagram B: Two plates are pushing against each other, causing the edges to bend upward.

Diagram C: One plate is going underneath the other plate and sinking into the soft rock below.

Diagram D: One plate is going underneath the other plate and sinking into the ocean below

Below is a theory that may explain why such a soap manufactured from the acid does have lower cleaning capabilities than just a component (soap) manufactured from palmitic acid.

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Answer:

Answers are given below.

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1) 0.680 moles of H₂S

0.680 mol × 6.022 × 10²³ molecules / 1mol

4.09× 10²³ molecules

2) 8.96 moles of KI

8.96 mol × 6.022 × 10²³ molecules / 1mol

53.96 × 10²³ molecules

3) 6.500 moles of KClO

6.500 mol × 6.022 × 10²³ molecules / 1mol

39.143 × 10²³ molecules

4) 0.950 moles of NaOH

0.950  mol × 6.022 × 10²³ molecules / 1mol

5.721 × 10²³ molecules

5) 4.73 moles of Na₂CO₃

4.73  mol × 6.022 × 10²³ molecules / 1mol

28.48 × 10²³ molecules

The functional groups that are involved in forming a peptide bond are the amine group (-NH2) and the carboxyl group (-COOH).

The formation of a peptide bond involves two functional groups: the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid. During the process, a condensation reaction occurs, resulting in the release of a water molecule. The carboxyl group of one amino acid donates a hydrogen atom (H) to the amino group of the adjacent amino acid, creating a peptide bond and forming a dipeptide. This process can continue through multiple amino acids, leading to the formation of longer polypeptide chains. Peptide bonds are crucial for the structural and functional integrity of proteins in living organisms. Proteins, which are made up of one or more polypeptide chains, are the most common type of biomolecules in living organisms.

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Answer: c

Explanation: built different

Answer: \(232.8\ K\)

Explanation:

Given

The volume of Nitrogen gas is \(V_1=3.5\times 10^{-2}\ m^3\)

Pressure is \(P_1=10^5\ Pa\)

Temperature \(T_1=291\ K\)

When the pressure and temperature changes i.e.

\(P_2=10^5\ Pa\)

\(V_2=2.8\times 10^{-2}\ m^3\)

Temperature is given by

\(\Rightarrow \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\\\Rightarrow T_2=\dfrac{P_2V_2}{P_1V_1}\times T_1\)

Insert values

\(\Rightarrow T_2=\dfrac{2.8\times 10^{-2}\times 10^5}{3.5\times 10^{-2}\times 10^5}\times 291\\\\\Rightarrow T_2=291\times 0.8\\\Rightarrow T_2=232.8\ K\)