A gas has a pressure of 300 torr, a temperature of 400 K,
and a volume of 50.0 milliliters. What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

Answer:

This answer I think it is Al,F

The balanced equation for the reaction between aqueous zinc bromide (ZnBr₂) and solid aluminum (Al) to produce aqueous aluminum bromide (AlBr₃) and solid zinc (Zn) is:

3ZnBr₂ + 2Al -> 2AlBr₃ + 3Zn

In this reaction, three moles of zinc bromide (ZnBr₂ ) react with two moles of aluminum (Al) to yield two moles of aluminum bromide (AlBr₃) and three moles of zinc (Zn). The equation is balanced in terms of both mass and charge, ensuring that the number of atoms of each element is the same on both sides of the equation.

This reaction represents a single replacement or displacement reaction, where aluminum replaces zinc in the compound to form a new compound and release zinc as a solid product.

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Answer:

6 × 10^23 atoms

Explanation:

This is because Avogadro's number aka 6.02 x 10^23 is applicable to every element and is the number of atoms in any 1 mole of an element. The answer 6 x 10^23 is closest to 6.02 x 10^23 because the 6.02 was rounded to just 6. Hope this helps :)

Answer:

The answer is D)

Explanation:

6 X 10^23

The smallest and least massive atomic particle is the electron, which is negatively charged.Due to the electron's extremely small mass, it is not counted inside the element's atomic number.

Although they are very small and possess a mass of 1/1850 of that of a protons or neutron, electrons carry a negative charge.Since they are so tiny, they do not, in reality, add to the weight of the atom.

These particles are frequently referred to it as subatomic particles since they are the building blocks of atoms.There are protons, neutrons, and electrons, three types of subatomic particles.Protons and electrons, two of a subatomic particles, each have an electrical charge of one or the other.

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The molar volume of gas is 20.48 liter/mol.

We need to know about molar volume to solve this problem. The molar volume is defined as how much volume is in one mole of the substance. It can be calculated by this equation

Vm = V / n

where Vm is molar volume, V is the volume of the substance and n is the total amount of substance in moles.

From the question above, the given parameters are

n = 5.47 moles

V = 112 L

By substituting the given parameter, we can calculate the molar volume

Vm = V / n

Vm = 112 / 5.47

Vm = 20.48 L/mol

Hence, the molar volume of gas is 20.48 liter/mol.

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it means kinetic energy

Answer:

k means. crores

Explanation:

it. is. very easy

The mass of grams of oxygen gas in this sample is 0.0040416 g

Given sample of oxygen volume is  1.74 liters

Pressure is 1.31 atm

And the temperature is 23 degress C which is equal to 23 + 273 = 296 K

To find the mass of oxygen we must :

The ideal gas formula is

PV = nRT

1.31 × 1.74 = n × 62.36 × 296

this implies

n = 2.3316/ 18458.56

n = 0.0001263 moles

molar mass = number of grams per sample/ number of moles

32 ×  0.0001263 = number of grams per sample

number of grams per sample = 0.0040416 g

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The term mole concept is used here to determine the mass of magnesium. The mass of magnesium is  26.3 g. Thus the correct option is B .

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The balanced equation when Magnesium and nitrogen react in a combination reaction to produce magnesium nitride is:

3 Mg + N₂→ Mg₃N₂

The mass of magnesium is obtained as follows:

10.1 g N₂ × 1 mol N₂ / 28.02 g N₂ × 3 mol Mg / 1 mol N₂ × 24.31 g Mg / 1 mol Mg = 26.28 ≈ 26.3

Thus the correct option is B - 26.3 g.

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Answer:

Nuclear power plants use heat produced during nuclear fission to heat water. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel

Explanation:

To calculate the final pressure in the flask, we can use the combined gas law, which states that the product of the initial pressure and initial temperature divided by the final temperature is equal to the product of the final pressure and final temperature.

By plugging in the given values and solving the equation, we can determine the final pressure of the flask.

According to the combined gas law, the equation can be written as (P1 * T1) / T2 = (P2 * T2) / T1, where P1 and T1 are the initial pressure and temperature, P2 and T2 are the final pressure and temperature.

Given that the initial pressure (P1) is 1.70 atm, the initial temperature (T1) is 45.0 °C (which needs to be converted to Kelvin by adding 273.15), the final temperature (T2) is -43.0 °C (also converted to Kelvin), and the additional 12.0 g of F2 gas is added to the flask at constant volume.

By substituting the values into the equation, we can solve for the final pressure (P2). The final pressure will be in the same units as the initial pressure (atm).

Thus, by plugging in the given values and solving the equation, we can determine the final pressure in the flask after the additional gas is added and the flask is cooled to -43.0 °C.

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Half-reaction for the cell's anode is given below:

Anode : \(\\Sn(s) \rightarrow Sn^{2+} (aq) +2e^{-}\)

The anode is defined as the electrode at which electrons leave the cell and oxidation occurs, and the cathode as the electrode at which electrons enter the cell and reduction occurs. The anode is usually the positive side.

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Your given question is quite incomplete here is complete question.

A voltaic cell is based on the reduction of _ Agt(aq) to Ag(s) and the oxidation of Sn(s) to Sn2+(aql) : Part 1  Include the phases of all species in the chemical equation: (aqh Anode: Sn(s) Sn?+ (aq)

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Answer:

\([C]=0.0221M\)

Explanation:

Hello there!

In this case, according to the given chemical reaction at equilibrium:

\(3A\rightleftharpoons 3B+2C\)

It is possible for us to set up the equilibrium expression as shown below:

\(Kc=\frac{[B]^3[C]^2}{[A]^3}\)

Whereas Kc, [A] and [B] are known as 0.0091, 0.031M and 0.0823M and it is required to calculate [C]; thus, we solve for it as follows:

\([C]^2=\frac{[A]^3Kc}{B]^3}\)

\([C]=\sqrt{\frac{(0.031)^3*0.0091}{(0.0823)^3}}\)

\([C]=0.0221M\)

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Answer:

A picture .There is high reactions in progression still the energy reaction reduced to indicate complete reaction.

Answer:

pic 3

Explanation:

(A) ON EDG2021

Answer:

Phosphorus trioxide

Explanation:

Answer:

Tetraphosphorus hexoxide

Explanation:

Give brainliest please

In the process of hydrogenating fat, the carbon atoms in the molecule are added.

what is fat hydrogenation?

In order to transform some or all of the unsaturated fat into saturated fat and create a solid or semi-solid fat, fat is normally liquid vegetable oils that are combined with hydrogen.

Vegetable oil is hydrogenated by heating a mixture of vegetable oil and a metal catalyst—typically nickel—in a near-vacuum environment to extremely high temperatures and then adding hydrogen. The oil's carbon atoms lose their double bonds with other carbons as a result. The double bond between carbon atoms can no longer exist since each carbon atom is single-bonded to a distinct hydrogen atom.

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a) The concentration of the hydrogen ions is  1 * 10^-7 M

b) The concentration of the hydroxide ions is  1 * 10^-7 M

c) Ratio of the hydrogen to the hydroxide ion is 1:1

We know that the pH of the solution would have to do with ratio of the hydrogen ion and the hydroxide ions that we have in the solution. We know that the pH values that range from 0 -6 is acid, 7 is neutral and 8 - 14 is basic.

Then we have that;

Concentration of the hydrogen ion in the solution is obtain from the formula;

[H^+] = Antilog (-pH)

At pH 7 we have;

[H^+] = Antilog (-7)

= 1 * 10^-7 M

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After three half-lives, 12.5% of the original sample of polonium remains.

Polonium is a very infrequent natural element. It is found in uranium ores but it is careless to extract it. It is obtained by bombarding bismuth-209 with neutrons to give bismuth-210, which then purifies to form polonium. All the industrially produced polonium in the world is made in Russia.Po-210 is an effect of the radioactive decay of uranium-238, which decays to radon-222 and then to polonium. Polonium 210 has a half-life of 138 days. Let the opening value of polonium-218 be 100. First half-life. Therefore, 6.25 % of the original sample remains after 4 half-lives that are 12 minutes. Element Polonium has atomic Number 84, p-block, Mass number is 209.

So we can conclude that polonium is a radioactive, silvery-gray, or black metallic element of the oxygen group in the periodic table.

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Heat required : 4.8 kJ

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

The heat needed to raise the temperature

Q = m . c . Δt

1. heat to raise temperature from -20 °C to 0 °C

\(\tt Q=10\times 2.09\times (0-(-20)=418~J\)

2. phase change(ice to water)

\(\tt Q=10\times 333=3330~J\)

3. heat to raise temperature from 0 °C to 25 °C

\(\tt Q=10\times 4.18\times (25-0)=1045~J\)

\(\tt Q~tot=418+3330+1045=4793~J\rightarrow rounding~and~2~sig~figs=4.8~kJ\)

China's scientific prowess is the result of a combination of historical legacy, government support, a strong education system, global competitiveness, and a commitment to international collaboration.

China's emphasis on science and scientific advancements can be attributed to several factors:

1. Historical Legacy: China has a rich history of scientific discoveries and innovations dating back centuries. Ancient Chinese contributions include inventions such as papermaking, gunpowder, compass, and the development of traditional Chinese medicine. This legacy has instilled a cultural appreciation for scientific knowledge and inquiry.

2. Government Support: The Chinese government recognizes the importance of science and technology for economic development and national progress. It has implemented policies and initiatives to promote scientific research, innovation, and education. Significant investments have been made in research and development, infrastructure, and the establishment of scientific institutions and universities.

3. Education System: China has a rigorous education system that places a strong emphasis on science, technology, engineering, and mathematics (STEM) education. There is a focus on producing a skilled scientific workforce to drive innovation and economic growth. The country has numerous prestigious universities and research institutions that attract talented students and researchers from both within China and internationally.

4. Global Competitiveness: China's rise as a global economic power has led to a desire to enhance its scientific capabilities and compete with other advanced nations. It recognizes that scientific advancements are key to technological innovation, industrial competitiveness, and addressing societal challenges.

5. International Collaboration: China actively engages in international scientific collaborations and partnerships. It recognizes the value of exchanging knowledge, sharing resources, and collaborating with researchers worldwide. This approach facilitates access to cutting-edge research, global networks, and diverse perspectives.

Overall, China's scientific prowess is the result of a combination of historical legacy, government support, a strong education system, global competitiveness, and a commitment to international collaboration. These factors have contributed to China's significant scientific advancements and its position as a scientific powerhouse.

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The \(NO_{3} ^{-}\) species is present in the supernatant of the complete reaction between lead (ii) nitrate and potassium iodide.

The clear liquid that remains above the solid residue after centrifugation, precipitation, crystallization, or settling is known as the supernatant. The species typically has a lower density and is precipitate-free. In order to more quickly and fully cause the precipitate (or "pellet") to gather on the bottom of the tube, centrifugation modifies the effective gravitational force acting on the tube or bottle.

The term "supernatant" is used to describe the residual solution. A variety of the cytokines found in supernatants are powerful angiogenesis modulators. Additionally, they have microvesicular bodies that carry RNA transcripts. Therefore, \(NO_{3} ^{-}\) species is present in the supernatant of the complete reaction between lead (ii) nitrate and potassium iodide.

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Answer:

Fe2O3 + 6HCl ==> 2FeCl3 + 3H2O

=> a = 1

b = 6

c = 2

d = 3

The idea of the atomic nature of matter was first developed by John Dalton.

He introduced the atomic theory, which proposed that matter was made up of tiny, indivisible particles called atoms. This theory was based on his observations and experiments on the behavior of gases

.Dalton's atomic theory had several postulates that helped explain the properties of matter. These postulates were:

All matter is made up of atoms, which are tiny, indivisible particles

.Each element is composed of atoms that are identical in size, shape, and chemical properties.

Atoms of different elements have different sizes, shapes, and chemical properties.

Atoms combine in fixed ratios to form compounds, and the ratios of their masses are related by whole numbers.

Atoms are indestructible and cannot be created or destroyed in chemical reactions

.However, Dalton's atomic theory was later modified and expanded upon by other scientists, including J.J. Thomson, Ernest Rutherford, and Niels Bohr, as new discoveries about the structure and behavior of atoms were made.

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Answer:Chemical energies,elastic energy,kinetic energy,Light energy :)

Explanation:

Answer:

7. Chemical

8. Chemical

9. Physical

10. Physical

11. Physical

12. Physical

Explanation:

The bases given that can be used to deprotonate a terminal alkyne include a. NaNH₂ and c. NaH.

Terminal alkynes are organic compounds that contain a carbon–carbon triple bond at the end of the carbon chain. They are relatively acidic and can be deprotonated by a strong base to form an acetylide ion.

Sodium amide is a very strong base ( pKa of its conjugate acid, NH3, is ~38 ), so it can deprotonate a terminal alkyne. Sodium hydride is a very strong base ( pKa of its conjugate acid, H2, is ~35 ), so it can deprotonate a terminal alkyne.

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Answer:

154.9475 grams

Explanation:

61.979g/mol is molar mass of Na2O

61.979g/mol times .250 M times 10L = 154.9475 grams