what pressure, in atmospheres is exerted by 0.325 mol of hydrogen gas in a 14.08L container at 35°C ?

Answer:

electron affinity: this is the energy released when a gaseous atom gains an electron to form a gaseous negative ion. electron affinity increases across the period and down the group

Electronegativity: the electronegativity of an atom is a power of that atom in a molecule to attract electron. the electronegativity values are plotted against atomic number. the electronegativity of element increases across the period but decreases down the group

Answer:

silicon (S)

Explanation:

The answer is option A: Work. Work is not a state function.

State functions are properties that depend only on the current state of a system and are independent of the path taken to reach that state. In other words, they are determined by the initial and final states of the system and not by the process or pathway between them.

Entropy (option B), enthalpy (option C), and internal energy (option D) are all examples of state functions. Entropy is a measure of the system's disorder or randomness, enthalpy is the total heat content of a system, and internal energy is the sum of the system's kinetic and potential energy.

On the other hand, work (option A) is not a state function because it depends on the pathway or process by which the system undergoes a change. Work is the energy transferred to or from a system due to a force acting on it. The amount of work done on or by the system can vary depending on the specific process or conditions involved.

Therefore, among the given options, work is the only one that is not a state function.

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According to the electronic configuration, elements of group 1,2 and 3 usually form ionic bonds as they have 1,2 and 3 valence electrons.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Exothermic and endothermic process are involved in changing of the state which is given below.

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When diluting denatured ethanol to 20% by volume using deionized water, the conductivity of the solution is expected to decrease. This is because deionized water has a lower concentration of ions compared to the denatured ethanol.

The lower ion concentration in deionized water leads to a decrease in conductivity. Therefore, the data suggests that deionized water is a good choice for dilution in this experiment as it minimizes the presence of ions in the solution.

Denatured ethanol is also known as denatured alcohol. It is ethanol (ethyl alcohol) that has been intentionally rendered unfit for human consumption by adding substances that are called denaturants and these denaturants are toxic or unpleasant-tasting compounds.

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Answer:

Insulation (Keep warm)

Explanation:

Ana is engaging in constructive play according to Parten's classification.

This type of play involves using objects or materials to create something, such as building with Legos. It allows children to explore their creativity and develop problem-solving skills as they plan and execute their construction.

Constructive play is also beneficial for developing fine motor skills and hand-eye coordination. It is often seen in children between the ages of 3-6, which is the age range that Ana falls into as a preschooler. Through constructive play, Ana is not only having fun but also learning valuable skills that will benefit her in various aspects of life.

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The process of the converting the gas in to the liquid on on cooling is called as the condensation.

The condensation is the process of the transformation by which the gaseous substance will changed in to the liquid form on the cooling. The one of the example of the condensation is the Conversion of the water vapor present in the air into the water droplets. When the water vapor that is present in the air comes in the contact with the cold surface and then  it condenses to form the water droplets.

Thus condensation is the process of the conversion of the gas in to the liquid.

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Acid A is 10^4 = 10000 times stronger than B. This istrue if acid A has a pKa of 5 compared acid B with Pka of 9.

Acid strength is quantified by the acid dissociation constant (Ka). The acid is more potent the higher the value. A higher pka indicates lower acidity. Therefore, a weaker acid results from a greater pKa and a smaller Ka. A weaker acid is one with a higher pKa.

Since pKa = -log10(Ka), an acid is 10 times stronger for each pKa value of 1 below another. Acid A is therefore 10^4 = 10000 times stronger than acid B.

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Answer: both the different glycosidic linkages of the molecules and the different hydrogen bonding partners of the individual chains.

Explanation:

Glycogen is a polysaccharide of glucose which is a form of energy storage in fungi, bacteria and animals. Glycogen is primarily stored in the liver cells and skeletal muscle.

The difference in interchain stability between the polysaccharides glycogen and cellulose is due to the different glycosidic linkages of the molecules and the different hydrogen bonding partners of the individual chains.

Answer:

A: Add a substance to the wash that reduces the number of charges transferred.

Explanation:

The attraction between opposite charges make the clothes attract together. To reduce them Increase the temperature of the air in the dryer to weaken the electric forces. Hence, option A is correct.

An electric dryer is used to dry the clothes and hair or other substances using electric current. A substance can have both negative and positive charges. The opposite charges will attract together while the negative charges repel.

By exposing clothes to electric dryer it will gain electrons from the dryer and the positive poles of the clothes will attracts it. The electric current from the dryer will make clothes temporarily polarised.

If temperature increases, the intermolecular force of attraction decreases by making the kinetic energy of molecules raised. Therefore by increasing the temperature of air from the dryer the attraction can be reduced.

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Answer:

It is the temperature at which water is frozen or is pure ice

"Absolutely zero" temperature is the coldest temperature possible. It's so cold that everything stops moving and has no energy left. Scientists use a special scale called Kelvin to measure temperature, and absolute zero is at 0 Kelvin or -273.15 degrees Celsius (-459.67 degrees Fahrenheit). We can't actually reach absolute zero in real life, but scientists have come very close in laboratories using special cooling methods.

Answer:

D

Explanation:

More liquid water molecules will change to water vapor until a

new equilibrium is reached.

Answer:

Equilibrium and Stability Quick Check

1. The rate of the forward reaction equals the rate of the reverse reaction.

2. More LIQUID WATER molecules will change to WATER VAPOR until a new equilibrium is reached.

3. By adding WATER (H2O).

4. The additional BROMINE IONS cause the equilibrium to shift to the REACTANTS.

5. Removing WATER (H2O).

Explanation:

100% if you put these answers.

Answer: calorimetry

Explanation: calorimetry: the measure of the amount of heat involved in a chemical or physical process.

The situation which would have caused the clear yellow solution to remain as is in dibenzalacetone synthesis at the end of 30 minutes can be due to Insufficient reactants, Inappropriate reaction conditions and Inhibition of the reaction.

The starting materials of dibenzalacetone synthesis are all colorless and turn into a clear yellow solution as they are mixed. The situation that would have caused the clear yellow solution to remain as is at the end of 30 minutes is the reaction having gone to completion. The formation of dibenzalacetone involves the aldol condensation of two moles of benzaldehyde with one mole of acetone.

The reaction is carried out in the presence of a base such as NaOH, which removes the acidic alpha-hydrogens of benzaldehyde and acetone to form the enolate ions. These ions are then condensed to form dibenzalacetone. In a successful reaction, the clear yellow solution will eventually become cloudy as dibenzalacetone forms as a solid precipitate. This can occur if not all of the starting materials were properly mixed or if the reaction did not proceed to completion due to factors such as insufficient heating or the presence of impurities.

Insufficient reactants: If there are not enough starting materials present, the reaction may not proceed to completion, and the yellow solution will not change. Inappropriate reaction conditions: Factors such as temperature, solvent, or pH could affect the reaction. If any of these factors are not optimal, the reaction may not proceed efficiently, leading to an unchanged yellow solution.

Inhibition of the reaction: The presence of any impurities or contaminants in the starting materials or the reaction mixture could potentially inhibit the reaction, causing the yellow solution to remain unchanged. To address these situations, ensure that you have the correct amounts of starting materials, follow the recommended reaction conditions, and work with clean and pure chemicals and equipment.

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The empirical formula of the chloride is SiCl₃.

Chlorine has a mass of 79.1 g. Subtracting this mass from the total mass of the compound, which is 100 g, we can find the mass of silicon, which is 20.9 g. The molar mass of chlorine is 35.5 g/mol and the molar mass of silicon is 28.1 g/mol.

To find the ratio of the two elements in the compound, we divide their masses by their respective molar masses. The resulting ratio is approximately 2.23:0.744, which can be simplified to 3:1. Therefore, the empirical formula of the chloride is SiCl₃.

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Caustic potash, also known as potassium hydroxide, is a highly alkaline chemical that is widely utilised in a range of industrial and commercial applications.

One of the most common applications for potassium hydroxide solution is the manufacture of soap and other cleaning goods. When potassium hydroxide is combined with fats or oils, it reacts to make soap. Saponification is the name given to this reaction.

The solution of potassium hydroxide is also utilised in the manufacturing of biofuels such as biodiesel. It is used to make biodiesel from vegetable oils and animal fats. The potassium hydroxide functions as a catalyst, assisting in the breakdown of fatty acids in oils and fats, allowing them to be used as fuel.

Furthermore, potassium hydroxide solution is used in the pulp and paper sector to aid in the breakdown of wood fibres in the production of paper.

Potassium hydroxide solution is also employed in the production of a variety of chemicals, including fertilisers, dyes, and pigments. It can also be used to purify water, make electronic components, and perform different scientific operations.

It should be noted that potassium hydroxide is a highly corrosive material that should be handled with caution. Contact with the skin or eyes can result in irritation or chemical burns, and inhaling the fumes can be hazardous. As a result, when working with potassium hydroxide solution, suitable safety precautions must be performed.

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Ranking the elements in order of increasing size, from smallest to largest:

F < O < N < C

Based on their position in the periodic table, we can rank the elements in order of increasing size from left to right:

Fluorine (F): Fluorine is the smallest element among the given options. It has the highest effective nuclear charge and the smallest atomic radius. Its valence electrons experience strong attraction from the nucleus, making it difficult to remove or add electrons.

Oxygen (O): Oxygen is the second smallest element among the given options. It has a slightly larger atomic radius than fluorine due to the addition of another electron shell. Its valence electrons experience a weaker attraction from the nucleus than fluorine.

Nitrogen (N): Nitrogen is larger than oxygen because it has one more electron shell. Its valence electrons experience even weaker attraction from the nucleus, making it easier to remove or add electrons.

Carbon (C): Carbon is the largest among the given options because it has the most electron shells. Its valence electrons experience the weakest attraction from the nucleus, making it the easiest to remove or add electrons.

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The limiting component or reactant in a chemical process is the one that controls how much product is created. Because metals and compounds respond in a balanced chemical equation according to their mole ratios, a limiting reactant is necessary.

When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the component that has been completely consumed.  Since the process cannot proceed without this reagent, the quantity of product that can be produced is constrained.

Excess reagents or surplus reactants are any chemicals that are present in amounts greater than those necessary to cause a reaction with the limiting reagent (sometimes abbreviated as "xs").

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The pressure calculated as the difference between the net hydrostatic pressure and the net colloid osmotic pressure is known as: filtration pressure.

Pressure can be defined as a measure of the force exerted per unit area of an object or body. Thus, it is usually measured in Newton per meter square.

In Science, there are different types of pressure and these include the following:

Filtration pressure is a pressure that is typically calculated as the difference between the net hydrostatic pressure and the net colloid osmotic pressure. Also, it promotes the filtration of fluid through a membrane.

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The new volume of the gas at STP is 163.8 mL. The pressure in the aerosol can at a temperature of 60 C is 8.4 atm. The volume of nitrogen at STP is 558.8 mL.

1. To solve for the new volume of the gas at STP, we can use the combined gas law equation:

(P1 x V1)/T1 = (P2 x V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2 and T2 are the new pressure and temperature, respectively, at STP. We know that STP is defined as 1 atm and 273 K.

Plugging in the given values, we get:

(6 atm x 10 mL)/100 K = (1 atm x V2)/273 K

Simplifying and solving for V2, we get:

V2 = (6 atm x 10 mL x 273 K)/(100 K x 1 atm) = 163.8 mL

Therefore, the new volume of the gas at STP is 163.8 mL.

2.To solve for the pressure in the aerosol can at a temperature of 60 C, we can use the combined gas law equation again:

(P1 x V1)/T1 = (P2 x V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2 and T2 are the new pressure and temperature, respectively, at 60 C. We know that V1 is constant since the can is sealed.

Plugging in the given values, we get:

(8 atm x V1)/318 K = (P2 x V1)/333 K

Simplifying and solving for P2, we get:

P2 = (8 atm x 333 K)/(318 K) = 8.4 atm

Therefore, the pressure in the aerosol can at a temperature of 60 C is 8.4 atm.

3. To solve for the volume of nitrogen at STP, we can use the combined gas law equation again:

(P1 x V1)/T1 = (P2 x V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2 and T2 are the new pressure and temperature, respectively, at STP. We know that P1 is constant since it is given that the pressure is constant.

Plugging in the given values and using the values for STP, we get:

(1 atm x 600 mL)/(293 K) = (P2 x V2)/(273 K)

Simplifying and solving for V2, we get:

V2 = (1 atm x 600 mL x 273 K)/(293 K) = 558.8 mL

Therefore, the volume of nitrogen at STP is 558.8 mL.

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If a gas was in a 4 liter container with 1.8 atmospheres of pressure, the volume would change to 24 litres if there were 0.3 atmospheres of pressure.

According to Boyle's law, at a constant temperature, the volume of a gas is inversely proportional to its pressure. This means that as the pressure on a gas increases, its volume decreases and vice versa.

Mathematically, we can represent this relationship as P₁V₁ = P₂V₂, where P and V are the pressure and volume of the gas at different states.

Using the Boyle's law formula, if a gas is in a 4-liter container with 1.8 atmospheres of pressure, we can find the volume of the gas by rearranging the formula as

V₂ = (P₁V₁)/P₂ where : P₁ = 1.8 atm ; V₁ = 4 L ; P₂ = 0.3 atm ; V₂ = ?

Substituting the given values into the formula, V₂ = (1.8 atm × 4 L) / 0.3 atmV₂ = 24 L

A gas in a 4-liter container with 1.8 atmospheres of pressure will have a volume of 24 liters if the pressure is reduced to 0.3 atmospheres. Therefore, the volume will increase if there were 0.3 atmospheres of pressure.

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The concentration of any chemical solution can be measured in grams solute/liters solution, moles solute/liters solution, or (grams solute)/ml solution. All three of these units are acceptable for measuring concentration.

e of the mentioned units can be used. These include:

a. (grams solute)/ml solution: This measures the concentration in terms of mass of solute per volume of solution (usually in milliliters).

b. moles solute/liters solution: This is called molarity and measures the concentration in terms of moles of solute per volume of solution (usually in liters).

c. grams solute/liters solution: This measures the concentration in terms of mass of solute per volume of solution (usually in liters).

So, all three units (a, b, and c) are acceptable for measuring the concentration of a chemical solution.

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Sodium (Na) has a smaller radius than Cesium (Cs) due to the increase in number of electron shells in Cs compared to Na.

The atomic radius of an element is determined by the number of electron shells it has. As you move down a group in the periodic table, the number of electron shells increases, resulting in larger atomic radius. Sodium and Cesium belong to the same group in the periodic table, but Cesium has one additional electron shell than Sodium.

This increase in the number of electron shells leads to an increase in atomic radius, making Cesium have a larger atomic radius than Sodium. Therefore, Sodium has a smaller radius than Cesium.

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Answer:

B. electric energy then chemical energy

Explanation:

Explanation:

just trying....hope that helps

1.6 grams of oxygen will react with 2.4 grams of magnesium.

Explanation:

Given:

2.4 grams of magnesium.

The reaction between magnesium and oxygen:

\(2Mg+O_2\rightarrow 2MgO\)

To find:

The mass of oxygen required to react with 2.4 grams of magnesium.

Solution:

The mass of magnesium = 2.4 g

Moles of magnesium =\(\frac{2.4 g}{24.305 g/mol}=0.0987 mol\)

\(2Mg+O_2\rightarrow 2MgO\)

According to the reaction, 2 moles of magnesium reacts with 1 mole of oxygen, then 0.0987 moles of magnesium will react with:

\(=\frac{1}{2}\times 0.0987 mol=0.04935\text{mol }O_2\)

Moles of oxygen required = 0.04935 mol

The mass of 0.04935 moles of oxygen :

\(=0.04935\times 31.999 g/mol=1.579 g\approx 1.6 g\)

1.6 grams of oxygen will react with 2.4 grams of magnesium.

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The metals in the center of the periodic table are called transition metals. There are 38 transition metals in total.

Answer:

They are called transition metals.

Number of moles of stearic acid are 1.35 x 10^-5 moles and the number of molecules is 3.03 x 10^16 molecules.

Number of moles of stearic acid in 0.25 mL of solution, we can use the formula: moles = (volume in L) x (concentration in mol/L)
Converting 0.25 mL to L gives us: 0.25 mL x (1 L/1000 mL) = 0.00025 L

Plugging this into the formula along with the given concentration of 54 x 10^-3 mol/L gives us:
moles = (0.00025 L) x (54 x 10^-3 mol/L)

= 1.35 x 10^-5 moles of stearic acid

To convert from cm^2 to nm^2, we can use the fact that there are 10^7 nm in 1 cm: 20.0 cm^2 x (10^7 nm/1 cm)^2 = 2.0 x 10^15 nm^2

To find the surface area of the water in the watch glass, we can use the formula for the area of a circle: A = πr^2. The radius of the watch glass is half the diameter, or 4.5 cm. Plugging this into the formula gives us:

A = π(4.5 cm)^2 = 63.6 cm^2

To convert this to nm^2, we can use the same conversion factor as in question 2: 63.6 cm^2 x (10^7 nm/1 cm)^2 = 6.36 x 10^15 nm^2

To find the number of stearic acid molecules needed to cover the surface of the watch glass, we can divide the surface area of the watch glass by the area covered by one molecule of stearic acid:
=(6.36 x 10^15 nm^2) / (0.21 nm^2/molecule) = 3.03 x 10^16 molecules of stearic acid

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