A certain material has a density of 19.3 g/ml. what is the material?

Answer:

1.35 M

Explanation:

grams/molar mass=ans./volume(L)

100/164=ans./.450

The pots and other articles made from clay hardened by heat is called ceramics..

HOPE IT'S HELPFUL FOR U MATE!!!!

\({ \red{ \underline{ \tt{Langmuir \: adsorption \: isotherm:}}}}\)

The defect of Freundlich adsorption isotherm is that it fails at high pressure of the gas.

Langmuir derived the adsorption isotherm based on the theoretical considerations. It is generally applied to chemical adsorption.

It can be expressed as

\({ \blue{ \bold{ \frac{X}{m} = \frac{AP}{1+BP}}}}\)

where,

X = mass of the gas adsorbed

M = mass of the adsorbent

P = equilibrium pressure

Answer:

Choux pastry

Explanation:

Eclairs are a long, thin pastry made from choux pastry and is filled with cream and topped with icing (usually chocolate).

I hope this helps!!

- Kay :)

Long French pastries composed of choux pastry, filled with custard or pastry cream, and covered with fondant icing are known as éclairs.

The fundamental components for choux dough, including as sugar, butter, flour, milk, and egg, are used to make eclairs, cream puffs, and profiteroles. However, it is crucial to read and follow the directions carefully to prevent common eclair blunders such . Eclair shells with broken surfaces.

A choux pastry-based éclair is a long, thin individual cake. This delicious treat is loaded with cream and covered with milk chocolate. A donut is a fried sweet treat made of sweet dough that is often shaped like a ring or ball.

The chocolate éclair, which is covered with chocolate fondant and filled with chocolate custard or pastry cream, is possibly the most well-known type of éclair.

Thus, éclair is made up of choux pastry.

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The density of nitric oxide (NO) gas at 1.21 atm and 54.1°C is approximately 1.32 g/L.

To determine the density of nitric oxide (NO) gas at 1.21 atm and 54.1°C, we can use the ideal gas law equation, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature. We can rearrange this equation to solve for density, which is mass per unit volume, represented as ρ = m/V.

First, we need to determine the number of moles of NO gas present. We can use the equation n = PV/RT, where P is the pressure in atmospheres, V is the volume in liters, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin. To convert 54.1°C to Kelvin, we add 273.15, giving us a temperature of 327.25 K.

n = (1.21 atm) x V / (0.0821 L·atm/mol·K x 327.25 K)
n = 0.044 L/mol x atm

Next, we need to calculate the mass of NO gas present. The molar mass of NO is 30.01 g/mol. Therefore, the mass of NO gas in grams is:

m = n x M
m = 0.044 mol x 30.01 g/mol
m = 1.32144 g

Finally, we can calculate the density of NO gas using the equation ρ = m/V:

ρ = m / V
ρ = 1.32144 g / 1 L
ρ = 1.32 g/L

Therefore, the density of NO gas at 1.21 atm and 54.1°C is 1.32 g/L.

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Answer:

\(V_2=5.32L\)

Explanation:

Hello there!

In this case, according to the given pressure, temperature and volume, it is possible for us to calculate the final volume via the combined ideal gas law:

\(\frac{P_2V_2}{T_2}=\frac{P_1V_1}{T_1}\)

In such a way, we solve for the final volume, V2, to obtain:

\(V_2=\frac{P_1V_1T_2}{T_1P_2}\)

Then, we plug in the given data to obtain:

\(V_2=\frac{1.19atm*2.3L*380K}{326K*0.60atm}\\\\V_2=5.32L\)

Regards!

All the statements given above are correct.

Atoms within resonance structures are the same. The species' structure is not accurately reflected by a single resonance structure.

A representation of a molecule or an ion called a resonance structure depicts several electron combinations that are not conceivable in a single, static structure.

Resonance hybrid refers to the actual structure of the molecule or ion, which is an average of the potential resonance structures.

Resonance structures are not different in terms of atoms, but rather in the arrangement of electrons.

Resonance structures vary, and no single resonance structure can fully capture the structure of an entire species.

The species that make up resonance structures have isomers.

The species could have any of these structures at any time since resonance forms quickly interconvert.

It is not real to have individual resonance shapes.

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Drawing several Lewis structures of a molecule connected by double arrow symbols (↔) implies that the molecule exhibits resonance. Resonance occurs when multiple Lewis structures can be written for a molecule, representing different arrangements of electrons. The actual structure of the molecule is a hybrid or combination of these resonance structures, and the double arrow signifies the delocalization or sharing of electrons between different atoms or regions within the molecule.

Resonance is a concept used in chemistry to describe situations where multiple Lewis structures can be drawn for a molecule, but none of the individual structures accurately represent the molecule's true electronic structure. Instead, the actual structure is a hybrid or combination of these resonance structures.

When drawing resonance structures, double arrow symbols (↔) are used to connect the different structures. The double arrow indicates that the molecule can exist in all of the resonance forms simultaneously, with electron delocalization or sharing occurring between different atoms or regions within the molecule.

The presence of resonance is often observed in molecules with conjugated systems, such as benzene or carbonate ions. The resonance stabilization provided by electron delocalization contributes to the stability and unique properties of these molecules.

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Answer:

A split-plot design lets us replicate our treatments twice using only 24 runs in a single time period, hence it is the most efficient use of resource.

Explanation:

hope this helps

Answer:

H2 is a gas which forms when two hydrogen atoms bond together and become a hydrogen molecule. H2 is also called molecular hydrogen.It consists of two protons and two electrons. Consequently it is the most common form of Hydrogen because it is stable with a neutral charge.

Explanation:

The statement for the element hydrogen typically exists as the compound H2, "it is stable with a neutral charge."

An element is a substance that cannot be divided into smaller substances through normal chemical processes. All matter is composed of elements, which are the basic building blocks.

The hydrogen molecule is the most basic covalently bound material. H2 is a gas created when two hydrogen atoms combine to form a hydrogen molecule. Molecular hydrogen is another name for H2. There are two protons and two electrons in it. As a result of its stability and neutral charge, it is the most prevalent type of hydrogen. H2 is a molecule that is not a free radical.

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Answer:

reaction to cold pack: change in temperature

Evidence of a chemical reaction etc is change in composition

Explanation: composition is atoms changeing and etc, which is a chemical reacton i think. Change in temperture is alsoa  chemical reaction but cold packs

Answer:

Cold pack: absorbs heat (endothermic reaction)

Hot pack: releases heat ( exothermic reaction)

Explanation:

when a cold pack/hot pack is shaken, water mixes with the chemicals in the outer layer and reacts to release or absorb heat.

Answer: Manganese(III) oxide is a transition metal compound. The oxidation state of manganese in this compound is +3 , and the chemical formula of the compound is Mn2O3.

Answer: +3 for the first box

MnO3 for the second box

Explanation: took the test

Answer:Buddhism

Explanation:

chinese religion is a Buddhism

Answer: First we start with our molecular equation to ensure all atoms are balanced to maintain the law of conservation of mass.

.

The equation is unbalanced since we have 1 Cl atom on the left-hand side as opposed to 2 on the right-hand side and 2  molecules on the left-hand side and 1 on the right-hand side. So we add a coefficient of 2 on  both the  and

Explanation:

The reaction occurs between solutes soluble in water to give a solid as a residue. So the complete ionic equation will show the soluble compounds in their dissociated states as ions in water and the insoluble compound as a solid.

2.94%

Percent error is a measurement of the accuracy of an observed value.

Finding Percent Error

The formula for percent error is \(|\frac{E-A}{A} |*100\), where E is the experimental value and A is the actual value. We take the absolute value because the percent error is always positive, and we multiply by 100 at the end to go from decimal to percentage. In this case, the experimental value is 1.40 cm and the actual value is 1.36 cm.

So, we can plug our values in to solve.

Then, multiply by 100 to get a 2.94% error.

Interpreting Percent Error

The smaller the percent error, the closer you were to the actual value. So, a percent error of 2.94% shows that the measurement was accurate. Oftentimes, a percent error of below 5% is considered accurate. Although, it's important to understand that different experiments will have different expectations for percent error. Human error or instrument error can both contribute to higher percent errors.

There is no recrystallization temperature for the 10% CW.I hope this helps.

From the 3D plot results, the recrystallization temperature for each %CW is approximated as shown in the table below:%CWApprox. recrystallization temperature (°C)30~31535~40050~46570~56590~650100~695There is a %CW for which the recrystallization temperature cannot be approximated. It is the 10% CW. The reason behind this is that there is no recrystallization temperature for that %CW. It is because the recrystallization temperature is the temperature at which the internal stresses are relieved through the process of recrystallization. But for the 10% CW, the material has not been cold worked enough to generate enough internal stresses that need to be relieved. Therefore, there is no recrystallization temperature for the 10% CW.I hope this helps.

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To determine the freezing point of the 0.015 molal aqueous solution of MgSO4, we need to use the formula for freezing point depression.

The molality of the solution is 0.015 molal, and the i factor for MgSO4 is 2.0. The molal freezing point depression constant for water is 1.86 c/m. The formula for freezing point depression is ΔTf = Kf x m x i, where ΔTf is the change in freezing point, Kf is the molal freezing point depression constant, m is the molality of the solution, and i is the van't Hoff factor.  Substituting the given values, we get:
ΔTf = 1.86 c/m x 0.015 molal x 2.0 = 0.056 c
The freezing point depression is 0.056 c, which means the freezing point of the solution is lowered by 0.056 c compared to pure water. Therefore, the freezing point of the solution is:
c = 0 - 0.056 = -0.056 c
Therefore, the freezing point of the 0.015 molal aqueous solution of MgSO4 is -0.056 c.

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The option that is not a known advantage of natural gas over other fossil fuels is: C. It is far more abundant than any other fossil fuel.

Natural gas has several advantages over other fossil fuels. Firstly, it burns more completely than other fossil fuels, which means it produces fewer pollutants and greenhouse gases.

This leads to the second advantage, as natural gas burns more cleanly than other fossil fuels, resulting in reduced emissions of pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter.

However, when it comes to abundance, natural gas is not necessarily more abundant than other fossil fuels.

While natural gas reserves can be substantial, the availability and reserves of other fossil fuels like coal and oil are also significant. Therefore, option C is not a known advantage of natural gas over other fossil fuels.

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Answer:

Neptune

Explanation:

According to the ideal gas equation and mole concept, there is 0.721 grams of HF present in the sample.

The ideal gas law is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.

Substitution in above equation gives n=2×4.50/8.314×300=0.036 which is mass= 0.036×20=0.721 g.

Thus, there is 0.721 grams of HF present in the sample.

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Here's link\(^{}\) to the answer:

bit.\(^{}\)ly/3gVQKw3

Here is an example

Explanation:

From n = 5 , the electron can drop to n =

4, 3, 2, 1. Thus, there will be 4

possibilities

Now, the electron that dropped to n = 4 can drop to n =3,2,1 This will give 3 possibilities

The electron at n = 3 can drop to n =2,1 This gives 2 possibilities

Finally, the electron at n = 2 can drop to n = 1 . This gives 1 possibility

Thus in total the number of ways in which the electron can de-excite is :

4 + 3 + 2 + 1 = 10

10 different wavelengths of light can be emitted as the electron loses energy

from n = 5 level

The increasing order of entropy for the substances given is as follows.

1. Ice

2. Water

3. Vaopr

Entropy is used to measure how random the particles in a system are. If the particles are in complete disarray, they have a higher entropy value. On the other hand, if they are perfectly arranged with no possible movement, then the substance has less or minimal entropy.

Entropy is one of the fundamental concepts in Thermodynamics and is associated with energy distribution in an isolated system. To be more precise, it also gives us different ways in which the particles can be distributed within the isolation.

In natural systems, entropy tends to increase with the passage of time, as all particles automatically turn toward disorders.

In the given cases, Ice has the least entropy as its solid particles have no room to move around, and their movements are restricted to vibrations only. Whereas for Vapor, due to very low forces between particles, they have near complete freedom of movement. Liquids like water come in between with their intermediate mobility.

Thus, the increasing order of entropy turns out to be Ice, Water, and Vapor.

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The hydrosphere include glaciers, groundwater, and polar ice. That is option A, B and C.

Hydrosphere is defined as the part of the earth that is made up of water which includes the surface of the planet, underground, and in the air.

The water found in the hydrosphere of earth moves in cycles in such a way that non is lost.

The components of the hydrosphere include the following:

The polar ice is part of the hydrosphere because it is the frozen part of the earth's hydrosphere.

The lava is not part of the hydrosphere but part of lithosphere and it's released when volcanic eruptions occurs.

Therefore is can be concluded that glaciers, groundwater, and polar ice are parts of the hydrosphere while the lava is not part of the hydrosphere.

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Answer:1. Ethanol + Dioxygen = Carbon Dioxide + Water

Explanation:

Answer:

Aluminum, because it is in group 13 and has three valence electrons.

The formation of molecule can easily be shown by drawing Lewis dot structure. Since  atom's Lewis dot structure has three dots. So Option A is correct option.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.

It is given that the Lewis dot structure of molecule contain only 3 electron. That means that element contains 3 electrons in its valence shell.

Aluminum's electronic configuration is 2,8,3

Lithium's electronic configuration is 2,1

Magnesium's has electronic configuration as 2,8,2

Potassium's electronic configuration is 2,8,8,1

Thus Aluminum is the only element that has 3 electron in its outermost shell So, Option A is correct option

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The answer cannot be provided without the specific values of the initial and final readings of the burets.

To determine the total volume of liquid delivered in milliliters (ml), you need to subtract the initial reading from the final reading of the burets. The difference between these two readings represents the volume of liquid dispensed.

To calculate the total volume, follow these steps:

1. Determine the initial reading of the burets in ml.

2. Determine the final reading of the burets in ml.

3. Subtract the initial reading from the final reading.

The resulting value will give you the total volume of liquid delivered in ml.

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