lans.
2. A sample containing 1.80 mol of argon gas has a volume of 10.00 L. What is
the new volume of the gas, in litres, when each of the following changes occurs in
the quantity of the gas? Assume that pressure and temperature remain constant.
The changes are not cumulative. T
(a) An additional 1.80 mol of argon gas is added to the container. [ans: 20.0 L]
(b) A sample of 25.0 g of argon gas is added to the container. [ans: 13.5 L]
(c) A hole in the container allows half of the gas to escape. [ans: 5.00 L]

Answer:

C

Explanation:

Answer:

ganyan din ang alam ko

Explanation:

letter c

1. The mass fraction of sodium carbonate in solution A and solution B are  0.05 and 0.15 respectively.

2. The mass fraction of sodium sulfate is 0.696

3. The equations of the interaction between the strontium chloride and the given solutions are:

The mass of sodium carbonate that will release 5.82 L and 4.70 L of carbon dioxide gas when reacted with sulfuric acid is determined from the equation of reaction below:

Na₂CO₃ + H₂SO₄ ---> Na₂SO₄ + H₂O + CO₂

1 mole or 106 g of Na₂CO₃ produces 1 mole or 22.4 L of CO₂

5.82 L of CO₂ will be produced by 5.82/22.4 * 106 g = 27.54 g

4.70 L of CO₂ will be produced by 4.70/22.4 * 106 g = 22.24 g

The mass fractions are calculated as follows:

Let the mass fraction of sodium carbonate in solution A and solution B be x and y respectively

x * 100 g + y * 150 = 27.54 g

100x + 150 y = 27.54 g --- (1)

x + 1.5 y = 0.2754

x * 150 + y * 100 = 22.24 g

150x + 100y = 22.24 ---- (2)

1.5x + y = 0.2224

solving for y in Eqn 1;

x = 0.2754 - 1.5y --- (3)

substitute (3) in (2)

1.5(0.2754 - 1.5y) + y = 0.2224

0.4131 - 2.25y + y = 0.2224

-1.25y = -0.1907

y = 0.15

x = 0.2754 - 1.50 * 0.15

x = 0.05

2. The molarity of 20% (W/W) solution of sulphuric acid is 2.55 M.

From the equation of the reaction, 1 mole sulfuric acid solution reacts with 1 mole sodium carbonate solution to form 1 mole sodium sulfate

Molar mass of sodium sulfate = 142 g/mol

Molar mass of H₂O = 18 g/mol

Molar mass of CO₂ = 44 g/mol

Total mass = 204 g

Mass fraction of sodium sulfate = 142/204

Mass fraction of sodium sulfate = 0.696

3. The equation of the interaction between the strontium chloride solution and the original solution of sodium carbonate is:

SrCl₂ + Na₂CO₃ ----> 2 NaCl (aq) + SrCO₃

The equation of the interaction between the strontium chloride solution and the solution obtained in the reaction between sodium carbonate and sulfuric acid is:

SrCl₂ + Na₂SO₄ ---> SrSO₄ + NaCl

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Answer:

0.032 mole

Explanation:

Please mark me as brainliest

Answer:

\(2.3molKClO_3\)

\(285.95gKClO_3\)

Explanation:

Hello there!

In this case, according to the balanced chemical equation:

\(2KClO_3\rightarrow 2KCl+3O_2\)

We can observe the 2:3 mole ratio in order to calculate the moles of KClO3 required for such production:

\(3.5molO_2*\frac{2molKClO_3}{3molO_2} \\\\2.3molKClO_3\)

And in grams:

\(2.3molKClO_3*\frac{122.55gKClO_3}{1molKClO_3} \\\\=285.95gKClO_3\)

Regards!

Regards!

Answer:

the frequency of photons \(v = 1.509\times10^{39}Hz\)

Explanation:

Given:  first ionization energy of 1000 kJ/mol.

No. of moles of sulfur = 1 mole

\(\Delta E_1 = 1000KJ/mol\)

We know that plank's constant

\(h = 6.626\times10^{-34} Js\)

Let the frequency of photons be ν

Also we know that ΔE = hν

this implies ν = ΔE/h

\(= \frac{10^6J}{6.626\times10^{-34} Js}\)

\(v = 1.509\times10^{39}Hz\)

Hence, the frequency of photons \(v = 1.509\times10^{39}Hz\)

Answer:

The current model of the atom and the characteristics of each of the 3 subatomic particles are the electron cloud which contains 1 subatomic particle the electron which has negative charge and weights 1/2000 AMU the electron cloud surrounds the nucleus, the nucleus contains two subatomic particles the proton which has positive charge and weights one AMU and the neutron which has neutral/no charge and weights one AMU.

Answer: \(y = \frac{1}{4}x-3\)

Explanation:

To find the inverse of an equation, follow these steps:

We are given the equation \(f(x) = 4x + 12\) , so replace f(x) with x.

Then, replace x with y.

Your new equation:

\(x = 4y + 12\)

Now, solve for y:

\(x = 4y + 12\\\\4y = x - 12\\\\y = \frac{1}{4}x-3\)

This equation is the inverse of f(x), or g(x).

Answer:

The pH of the solution is 1.68.

Explanation:

Hope this helped!

Answer:

4.458 L

Explanation:

Assuming the pressure remains constant  and assuming 24° C and 58° C

V1/T1  = V2/T2       Where T is in Kelvin

V1/T1  *  T2  = V2

4 / ( 273.15 +24)    *    ( 273.15 + 58)    =  4.458 L

1100 mmHg

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Gas Laws

Stoichiometry

Step 1: Define

[Given] 1.5 atm

[Solve] mmHg

Step 2: Identify Conversions

1 atm = 760 mmHg

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1140 mmHg ≈ 1100 mmHg

Answer:

Exothermic

Explanation:

Nuclear fission means splitting, so there is a lot of energy being released.

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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The true statements are;

Now we can see that the reaction here is a redox reaction. Thus;

Eocell = cell potential = 0.54 - (-0.41) = 0.95 V

K = equilibrium constant = ?

n = number of moles of electrons = 2

ΔG = change in free energy = ?

Hence;

Eocell = 0.0592/n log K

0.95 = 0.0592/2 log K

K = 0.95 * 2/0.0592

K = 1.2 * 10^32

Now

ΔG = -nFEcell

ΔG = - (2 * 96500 *  0.95)

ΔG = -183.3kJ

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Answer:

He figured out the amount of charge on an electron

Explanation:

Answer:
the accurate determination of the charge carried by an electron, using the e “falling-drop method”; he also proved that this quantity was a constant for all electrons, thus demonstrating the atomic structure of electricity.

Explanation:

Answer: 4 and 1.

Explanation:

Answer:

CH4 (g) and O2 (g) are both in the gaseous state, while CO2 (g) and H2O (g) are also in the gaseous state.

In the above reaction, the reactants are in the gaseous state, and the products formed are also in the gaseous state.

Every compound in a chemical reaction can be in any state of matter like solid, liquid, or gas. In the reaction of methane and oxygen, the initial state of the reactants is in the gaseous form. The chemical reaction of methane and oxygen is given by the equation CH4 (g) + 2 O2 (g) -> CO2 (g) + 2 H2O (g).Here, methane and oxygen are the reactants, and carbon dioxide and water are the products. Methane (CH4) and oxygen (O2) react together in the presence of a spark or heat to produce carbon dioxide (CO2) and water (H2O).In the reaction, the methane gas combines with oxygen gas, which causes the release of heat energy and forms carbon dioxide gas and water vapor. Methane gas is a colorless and odorless gas that burns cleanly and is one of the primary components of natural gas.

The oxygen gas required for the reaction is available in the atmosphere. Carbon dioxide is a colorless gas with a faint odor and taste and is a significant component of the Earth's atmosphere. Water is a colorless, odorless, and tasteless liquid that is essential to life.The state of matter of every compound in a chemical reaction can change depending on the conditions in which the reaction occurs. For instance, a substance that is in the solid state at a lower temperature may melt into a liquid or boil into a gas at a higher temperature. Similarly, a liquid may freeze into a solid or vaporize into a gas under different conditions.

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If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

When bonds in the reactants are broken in endothermic reactions, greater energy is absorbed than emitted when new bonds are created in the products.

The energy required to break existing bonds in endothermic processes is more than the energy released when new bonds are generated. In an exothermic process, more energy is generated when new bonds are created than is consumed when old ones are broken.

If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

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Answer:

When you heat ice, its temperature rises, but as soon as the ice starts to melt, the temperature stays constant until all the ice has melted. This happens because all the heat energy goes into breaking the bonds of the ice's crystal lattice structure.

Explanation:

The temperature stop rising while ice melts into water because, the energy is being absorbed to separate the particles. This is because of latent heat of fusion.

The amount of energy needed to convert the solid substance into a liquid substance by modifying its physical effects. It exists also named enthalpy of fusion. When heat exists supplied to ice, it begins melting and heat is used to increase temperature initially. But after the occasional temperature of ice does not vary and the extra heat exists utilized to melt the ice by cracking bonds between crystal lattice of ice.

The temperature stops increasing while the ice melts into the water because the energy exists being absorbed to divide the particles. This exists because of the latent heat of fusion.

Therefore, (D) option is the correct answer.

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Answer:

polarity

Explanation:

because of its polarity it can dissolve mutiple substance

The pH value of 500 mL of an aqueous solution of 0.005 mole HCl is 2

We'll begin our calculations by obtaining the molarity of the solution. Details below:

Molarity = mole / volume

Molarity = 0.005 / 0.50

Molarity = 0.01 M

Next, we shall obtain the concentration of the hydrogen ion, H⁺ in the solution. Details below:

HCl(aq) <=> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺

Therefore,

0.01 M HCl will also contain 0.01 M H⁺

Thus, the concentration of the hydrogen ion, H⁺ in the solution is 0.01 M

Finally, we shall determine the pH of the solution. Details below:

pH = -Log H⁺

pH = -Log 0.01

pH = 2

Thus, we can conclude that the pH of the solution is 2

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Exothermic reactions only release thermal energy, raising the temperature of the immediate environment. The environment is cooled through an endothermic process that absorbs heat.

An exothermic process is one in which energy is given off as heat or light. In contrast to an endothermic process, which draws energy from its surroundings, an exothermic reaction transfers energy into the environment.

The most exothermic reaction is the burning of methane because it generates a significant quantity of heat.

Thus, Exothermic reactions only release thermal energy.

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Answer:

Explanation:

Two pyruvate molecules remain at the end of glycolysis and are still very rich in energy that can be extracted. Although no ATP is directly produced during pyruvate oxidation, it is the next stage in the process of converting the residual energy into ATP

This process happens in the matrix, the mitochondria's deepest chamber, in eukaryotes. It takes place in the cytoplasm of prokaryotes. Overall, pyruvate oxidation transforms the three-carbon molecule into the two-carbon molecule acetyl CoA CoAstart text, C, o, A, end text, which is attached to Coenzyme A. This results in a NADH NADHstart text, N, A, D, H, end text and the release of one carbon dioxide molecule. In the subsequent step of cellular respiration, acetyl CoA CoAstart text, C, o, A, end text serves as fuel for the citric acid cycle.

Answer:

gguhg

Explanation:

no te es caso drama me están muy una las y y que las te

Answer:

D

Explanation: