At STP a gas has a volume of 42.08L. Its volume would be 85.61L at 1,883.98K and what pressure (in kPa)?

Based on the calculations performed in this experiment, the same mass of a solute with a significantly higher molar mass would have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

Boiling point elevation is a thermodynamic phenomenon that occurs when the boiling point of a solvent (a substance that dissolves a solute to create a solution) is increased by adding another substance, the solute, to it. When a solute is added to a solvent, it lowers the freezing point and raises the boiling point of the solvent, which is known as the boiling point elevation.The formula for boiling point elevation is: ∆Tb = Kbm

Here, ∆Tb is the boiling point elevation, Kb is the molal boiling point elevation constant, and m is the molality of the solution. To understand this, let us take an example: Suppose a solution containing 1.0 mol of sodium chloride (NaCl) is dissolved in 1.0 kg of water. The molality of the solution is 1.0 mol / 1.0 kg = 1.0 m. In addition, the Kb for water is 0.51 °C/molal, which means that the boiling point elevation is 0.51 °C when the molality of the solution is 1.0 mol/kg.So, the boiling point of the solution will be raised by 0.51 °C, which can be calculated using the above formula.Calculation performed in this experiment:Boiling point elevation = ΔTb = Kb . mTherefore, based on the above formula, the boiling point elevation is directly proportional to the molality of the solution, which, in turn, is directly proportional to the number of moles of solute in the solution. Furthermore, the number of moles of solute is proportional to the mass of the solute (in grams) divided by its molar mass (in grams/mol).So, if a solute with a significantly higher molar mass is added to the solvent, it will have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

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The example circled in red represents gas. Based on the information I know, gas particles move around freely. More than the second example, which represents liquids and more than the first example too, which represents solids. In short, the particles are not as close to eachother as the other two examples are. That means the example circled represents gas.

sorry if there are grammar mistakes, hope this helps regardless

The errors in the given equation "Li + O₂ → LiO₂" are as follows:

Incorrect formula for lithium oxide: The correct formula for lithium oxide is Li₂O, not LiO₂.

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. The balanced equation is:

4 Li + O₂ → 2 Li₂O

In the balanced equation, we have 4 lithium (Li) atoms on both sides and 2 oxygen (O) atoms on both sides, satisfying the law of conservation of mass.

Li₂O is the chemical formula for lithium oxide. It is an inorganic compound composed of two lithium (Li) atoms bonded to one oxygen (O) atom. Lithium oxide is a solid white crystalline substance with high melting and boiling points.

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Answer:

It is based on testable and replicable evidence.

Answer:

134,061.9 dollars and 118,222.45 lbs.

Explanation: you're welcome :)

The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)

First, we shall obtain the volume of the substance. This can be obtained as follow:

Volume of substance = (Volume of water + substance) - (Volume of water)

Volume of substance = 75 - 70

Volume of substance = 5 mL

Finally, we shall determine the density of the substance. This is illustrated below:

Density = mass / volume

Density of substance = 2 / 5

Density of substance = 0.4 g/mL

Thus, the density is 0.4 g/mL (Option D)

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The given statement "An emission spectrum produced by container of the hydrogen gas. when we changing the amount of hydrogen in the container will change the colors of lines in the spectrum" is true. Because the colors of the lines in the emission spectrum produced by a container of hydrogen gas depend on the energy levels of the hydrogen atoms.

The emission spectrum produced by a container of hydrogen gas contains a series of discrete lines corresponding to the specific wavelengths of light emitted when excited hydrogen atoms release energy. The colors of these lines are determined by the energy differences between the electron energy levels involved in the transitions.

Changing the amount of hydrogen in the container would alter the number of hydrogen atoms that can emit light, and thus, the intensity of the lines in the spectrum. It would not, however, affect the energy differences between the electron energy levels, and therefore, the colors of the lines would remain the same.

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The mixture as per the question is endothermic reaction when the contents of the tube containing the equilibrium mixture turned a lighter color whenever the tube was placed into an ice bath.

Activation energy  can be defined as the minimum energy required by particles at the reactant side for a chemical reaction to occur. According to the reaction conditions, specifically for reversible reactions, reactants can in turn become products and vice versa.

Exothermic reaction can be defined as the process where the heat energy is liberated in the conversion of the reactants to products for the forward reaction. We know that the heat is created in this process a small part of the energy may be initially provided to activate the reactant particles but once the reaction is in ongoing state it produces good amount of heat energy to keep the process in flow.

The reverse reaction, we know that is the endothermic in nature. The heat energy is absorbed in the conversion of the products ( now reactants in the reverse reaction ) to reactants ( now products in the reverse reaction ), as a result of this more amount of  energy has to be initially and continuously supplied for them to overcome the activation energy barrier for the reverse reaction to occur and be sustained.

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Answer:

D - combining it's potential energy with it's kinetic energy

Chemical reaction can be reversed if the energy of the reactants is less than the activation energy threshold.

A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously.

In equilibrium reaction, the activation energy of the forward reaction is more than that of backward reaction which causes bond breakage of the reactants.

Activation energy = (Threshold energy) - (Internal energy of the reactants)

Thus, a chemical reaction can be reversed if the energy of the reactants is less than the activation energy threshold.

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The freezing point of the solution containing 60 g of glucose in 250 g of water is -2.48°C.

To calculate the freezing point of the solution, we need to use the formula:

ΔTf = Kf × m

Where ΔTf is the change in freezing point, Kf is the freezing point depression constant of water, and m is the molality of the solution.

First, we need to calculate the molality of the solution:

Moles of glucose = 60 g / 180 g mol^-1 = 0.333 mol
Molality (m) = moles of solute / mass of solvent in kg
           = 0.333 mol / 0.250 kg
           = 1.332 mol kg^-1

Now we can substitute the values into the formula:

ΔTf = Kf × m
ΔTf = 1.86 K kg mol^-1 × 1.332 mol kg^-1
ΔTf = 2.48 K

So the freezing point of the solution is lowered by 2.48 degrees Celsius compared to pure water. To find the actual freezing point of the solution, we need to subtract this value from the freezing point of water (0 degrees Celsius):

Freezing point of solution = 0°C - 2.48°C
                                  = -2.48°C

Therefore, the freezing point of the solution containing 60 g of glucose in 250 g of water is -2.48°C.

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Answer:

compound is CuO.

Explanation:

rxn:

CuO + 2HCl = CuCl2 (Blue green color) + H2O

Answer

b. Oil, water, chloroform.

Explanation

Between water, chloroform, and oil, chloroform is the most dense substance (1.5 g/cm3), followed by water which has a density of 1.0 g/cm3. The least dense substance is oil with density of 0.9 g/cm3. Therefore, the oil will be at the top, followed by water, then chloroform will be at the bottom.

The fluids layered from top to bottom are oil, water and chloroform. Therefore, the correct option is option B.

A fluid is defined as a substance that has the ability to flow and conform to its surroundings. They can be found in both liquids and gases, among other forms. Liquids, like water, have a specified volume but no clear shape, whereas gases, like the air, have neither a specific volume nor shape. We need fluids to survive every day. Since water makes up the majority of the fluid in our bodies, they are essential for our survival. Fluids are also essential in many industrial processes, such as manufacturing, energy production, and transportation.

Therefore, the correct option is option B.

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Answer:

 A system that we use daily or almost every day is, for example, when boiling water for cooking.

Explanation:

This is the case of an open system.

Boiling water in a pot without a lid, exchanges heat energy and mixes with its surroundings when it enters a gaseous state.

The energy introduced into the system by the fire transforms the water into gas, which is released back into the environment. Without that constant heat injection, the water will stop boiling; and without room to get out, the steam (matter) will increase the pressure until the pot burst.

You can find examples like these anywhere, knowing the definition of each system:

The average bond enthalpy, in kJ/mol, of an oxygen-oxygen bond in O\(_3\) is 889.5kJ/mol. Bond enthalpy, sometimes referred to as binding energies.

Bond enthalpy, sometimes referred to as binding energies, is a number that sheds light on the potency and, consequently, the stability of a chemical bond. The total energy required for breaking 1 mole of a chemical bond is known as that of the bond enthalpy of the that chemical bond.

2O\(_3\)(g) → 3O\(_2\), ΔH=-285 kJ/mol

enthalpy of reaction = 3×bond enthalpy of O\(_2\) - 2×bond enthalpy of O\(_3\)

-285 =3×498 - 2×bond enthalpy of O\(_3\)  

-285 = 1494- 2×bond enthalpy of O\(_3\)  

-285-1494= - 2×bond enthalpy of O\(_3\)  

-1779 = - 2×bond enthalpy of O\(_3\)  

bond enthalpy of O\(_3\) =1779/2=889.5kJ/mol

Therefore, the average bond enthalpy, in kJ/mol, of an oxygen-oxygen bond in O\(_3\) is 889.5kJ/mol.

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Answer: 22

Explanation:

The final pressure assuming constant temperature and number of moles is 0.373 atm

According to Boyle's Law, the pressure and volume of a gas are inversely proportional at a constant temperature and number of moles. Therefore, we can use the equation P1V1 = P2V2 to solve for the final pressure.
Initially, the chamber had a pressure of 0.884 atm and a volume of 22.4 L. Let's call this state 1. The final volume is 53.1 L, which we'll call state 2. The number of moles and temperature are constant, so we don't need to worry about those variables.
Using the equation P1V1 = P2V2, we can rearrange to solve for P2:
P2 = \frac{(P1V1) }{ V2}
Plugging in the values we know:
P2 = \frac{(0.884 atm * 22.4 L) }{53.1 L}
P2 = 0.373 atm
Therefore, the final pressure assuming constant temperature and number of moles is 0.373 atm.

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Answer:

Approximately \(0.20\; \rm L\).

Explanation:

Convert the temperature of this gas to absolute temperature:

\(T = 25\; \rm ^\circ C \approx (25 + 273.15)\; \rm K = 298.15\; \rm K\).

Let \(P\) and \(V\) represent the pressure and volume of this gas, respectively. Let \(n\) represent the number of gas particles in this gas. Let \(R\) represent the ideal gas constant. By the ideal gas law:

\(P \cdot V = n \cdot R \cdot T\).

For this question:

Look up the ideal gas constant \(R\) that takes \(\rm atm\) as the unit for pressure:

\(R \approx 0.082057\; \rm L \cdot atm \cdot K^{-1}\cdot mol^{-1}\).

This question is asking for \(V\), the volume of this gas. Rearrange the ideal gas equation and solve for \(V\):

\(\begin{aligned} V &= \frac{n \cdot R \cdot T}{P} \\ &\approx \frac{0.00831\; \rm mol\times 0.0082057\; \rm L \cdot atm \cdot K^{-1}\cdot mol^{-1}\cdot 298.15\; \rm K}{1.01\; \rm atm} \\ &\approx 0.0020\; \rm L\end{aligned}\).

Adenosine triphosphate (ATP) and lactic acid both relate to cellular respiration in different ways. as ATP and lactic acid are both involved in cellular respiration.

Cellular respiration is the process by which the cell produces ATP (adenosine triphosphate), which is used for energy by the cell, and lactic acid is produced as a byproduct of the process. The complete breakdown of glucose into carbon dioxide and water, with the production of ATP, is known as cellular respiration.

ATP is synthesized during cellular respiration, a process in which the cell breaks down food molecules such as glucose and converts them into energy (ATP). The process can occur in two ways: aerobic respiration and anaerobic respiration. Aerobic respiration is a type of cellular respiration that requires oxygen. In the absence of oxygen, anaerobic respiration can occur.

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0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

We can use the balanced chemical equation to determine the stoichiometry of the reaction and calculate the number of moles of HBr produced.

From the balanced chemical equation:

1 mol of H2 reacts with 1 mol of Br2 to produce 2 moles of HBr.

Since we are given the volume of hydrogen gas, we need to convert it to moles using the ideal gas law:

PV = nRT

Where

Assuming standard temperature and pressure (STP) conditions of 0°C and 1 atm, the volume of 6.6 L of hydrogen gas is:

n = PV/RT = (1 atm) x (6.6 L) / [(0.08206 L atm mol^-1 K^-1) x (273 K)]

n = 0.270 mol

Since the balanced chemical equation tells us that 2 moles of HBr are produced for every 1 mole of H2, we can calculate the number of moles of HBr produced as:

moles of HBr = (0.270 mol H2) x (2 mol HBr/1 mol H2) = 0.540 mol HBr

Therefore, 0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass = 10 g

volume = 15 cm³

We have

\(density = \frac{10}{15} = \frac{2}{3} \\ = 0.66666666...\)

We have the final answer as

Hope this helps you

The major product is 3-methyl-2-pentene and the minor product is 2-ethyl-1-butene.

The alkyl halide shown is 3-bromo-3-methyl pentane. We can see that it is a tertiary alkyl halide. The proportion of products formed during the reaction are determined by Markovnikov rule.

The two products of this reaction are; 3-methyl-2-pentene and 2-ethyl-1-butene. The major product is 3-methyl-2-pentene because it is formed from a more stable carbocation intermediate.  2-ethyl-1-butene is the minor product.

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Answer:

- Anode: Co3+ | Co2+

- Cathode: Ni | Ni2+

Explanation:

The anode is where oxidation reaction occurs, and the cathode is where reduction reaction occurs.

From the table of reduction potencials, we find that:

- Co reaction:

- Ni reaction:

Now, to find out which one is the anode and which one is the cathode, it is necessary to compare the reduction potencials.

The reaction of Ni have negative potentials, so Ni will be the anode and Co will be the cathode.

Answer:

The initial temperature of the metal is 84.149 °C.

Explanation:

The heat lost by the metal will be equivalent to the heat gain by the water.  

- (msΔT)metal = (msΔT)water

-32.5 grams × 0.365 J/g°C × ΔT = 105.3 grams × 4.18 J/g °C × (17.3 -15.4)°C

-ΔT = 836.29/12.51 °C

-ΔT = 66.89 °C

-(T final - T initial) = 66.89 °C

T initial = 66.89 °C + T final

T initial = 66.89 °C + 17.3 °C

T initial = 84.149 °C.

The study of chemicals and bonds is called chemistry.

The correct answer is 50, 50, and 70.

In an element, there are the following things:-

In elements, the number of protons and electrons are the same. hence, the number of electrons and protons in an element is 50.

The neutrons are defined as the proton minus mass number. Hence, the number of neutrons is 120-50=70

Hence, the answer is  50, 50, and 70

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In a close system, the total energy of the system will decrease as the ice causes the warm water molecules to lose kinetic energy.

It is a system that is enclosed and would not allow the flow of any material form itself to another or form another system to itself.

A close system also does not allow transfer of energy between system.

Therefore, the total energy of the system will decrease as the ice causes the warm water molecules to lose kinetic energy.

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