To study a key fuel-cell reaction, a chemical engineer has 20.0-L tanks of H₂ and of O₂ and wants to use up both tanks to form 28.0 mol of water at 23.8°C. (c) Compare the results from the two equations.

Answer:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . ... The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.

Answer:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .

Explanation:

The new gas's temperature in degrees Celsius is roughly -153.89°C.

The general gas equation is another name for the expression PV = mRT. where P is the gas's pressure, V is the volume occupied, m is the gas' mass, and R is the gas's general constant.

We must apply the combined gas law to this issue, which indicates that:

(P1V1)/T1 = (P2V2)/T2

Since the issue doesn't specify any changes in pressure, we can infer that the gas's pressure stays the same. Thus, the equation can be made simpler to:

(V1/T1) = (V2/T2)

Solving for T2, we get:

T2 = (V2/V1) x T1

Plugging in the values we have:

V1 = 10.0 L

V2 = 4.0 L

T1 = 25°C+273.15

= 298.15 K

T2 = (4.0 L / 10.0 L) x 298.15 K = 119.26 K

We deduct 273.15 to convert this back to Celsius:

T2 = 119.26 K - 273.15 = -153.89°C

So the new Celsius temperature of the gas is approximately -153.89°C.

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Question:

An unknown gas at 25°C was transferred completely from a 10.0 L container to a 4.0 L container. What is the new Celsius temperature of this gas? Whose/what law is this?

Carbon dioxide is produced when 5 mL of methane gas interacts.

Methane, a hydrocarbon, is the primary component of natural gas. Methane has an effect on the climate and temperature of the earth because it is a greenhouse gas (GHG). Methane is released into the atmosphere through a variety of natural and anthropogenic (caused by humans) sources.

Methane is non-toxic and safe to breathe in small amounts, but if it is allowed to replace air in large quantities, the absence of oxygen could result in suffocation.

\(CH_{4}(g) + 2O_{2} \rightarrow CO_{2} + 2H_{2}O(g)\)

1 volume of \(CH_{4}\) = 1 volume of \(CO_{2}\)

5 ml of \(CH_{4}\) = 1 × 5 mL CO2

                    = 5 mL CO2

So, volume of methane = 5mL

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Answer:

B

Explanation:

The student is not able to move the box in D --> 55N, 0N. Since the net force is 0, it means that no force is being applied. So you will choose answer B from your options.

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In the electrochemical reaction represented by the balanced equation 3Mn(s) + 2Au₃⁺(aq) → 3Mn₂+(aq) + 2Au(s), a total of 6 moles of electrons are transferred.

The balanced equation provides the stoichiometric coefficients of the reactants and products, which represent the mole ratios in the reaction. In this case, the coefficient of Mn(s) is 3, and the coefficient of Au³⁺(aq) is 2. This means that for every 3 moles of Mn atoms and 2 moles of Au⁺ ions involved in the reaction, 3 moles of Mn²⁺ ions and 2 moles of Au atoms are produced.

Since the balanced equation does not specify the number of electrons involved in the transfer, we need to consider the changes in oxidation states of the elements to determine the number of electrons spectator ions transferred. In this reaction, each Mn atom loses 2 electrons, going from an oxidation state of 0 to +2, while each Au³⁺ ion gains 3 electrons, going from an oxidation state of +3 to 0.

Therefore, for every 3 moles of Mn atoms that lose 2 electrons each and 2 moles of Au³⁺ ions that gain 3 electrons each, a total of 6 moles of electrons are transferred in the reaction.

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Answer:

0 Celsius

Explanation:

its 0 degrees C

Answer:

0°C =  32°F

Explanation:

The diene that reacts with one equivalent of HBr to form the two bromoalkene products described in the question can be drawn as follows:

    H          H

    |          |

H3C-C=C-CH2-CH=CH2

    |          |

    H          H

In this diene, there are two double bonds, one between carbons 2 and 3 and another between carbons 4 and 5. When one equivalent of HBr is added to this diene, an electrophilic addition reaction occurs in which the H and Br add to the two double bonds to form two different products, as described in the question.

The effect of increasing temperature on the relative amount of each product can be explained by considering the mechanism of the reaction. The reaction proceeds through a carbocation intermediate, which is formed by protonation of the diene with HBr. The carbocation intermediate can then react with Br- to form the bromoalkene products.

Product 1 is formed by the addition of HBr to the double bond between carbons 2 and 3, which results in the formation of a more stable tertiary carbocation intermediate. As the temperature increases, the reaction rate increases, which can lead to a higher proportion of product 1 being formed. However, at very high temperatures, the reaction rate can become too fast, leading to increased side reactions such as rearrangements, which can decrease the relative amount of product 1.

Product 2 is formed by the addition of HBr to the double bond between carbons 4 and 5, which results in the formation of a less stable secondary carbocation intermediate. As the temperature increases, the reaction rate also increases, which can lead to a higher proportion of product 2 being formed. However, at very high temperatures, the reaction rate can become too fast, leading to increased side reactions such as elimination, which can decrease the relative amount of product 2.  Therefore, the answer to the question is that as the temperature increases, the relative amount of product 1 is expected to increase, while the relative amount of product 2 is expected to decrease due to side reactions. However, at very high temperatures, both products can be affected by side reactions, and the relative amounts may not change significantly.

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Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)

Answer:

if u answer my today's a pic quatiom I will give u ur any questions

Answer:

balanced

resistance

gravity

counteract

acceleration

According to vital force theory, organic compounds must have their origin in living organisms and could never be synthesized from inorganic material. This theory is known as the vital force theory

Berzelius gave this theory in 1809. According to this theory, the organic living compounds are not formed from inorganic compounds but a vital force. This vital force or spiritual force is called God. Vital Force Theory was rejected in 1823 when Friedrich Wöhler synthesized the first organic compound urea from an inorganic compound, Ammonium cyanate.

Berzelius defined this theory in 1815, setting down three principles with it:

1- Organic compounds cannot be made in the laboratory from inorganic compounds.

2- The synthesis of organic compounds requires a vital force.

3- Only living organisms (God-given) contain this vital force.

When pressure is maintained constant, the volume of a particular mass of gas varies in person with the true temperature of the gas.  The volume of a specific quantity of a gas is inversely related to its pressure at constant temperature.

Each thing in three dimensions takes up some space. The volume of this area is what is being measured. The space filled within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity.

When pressure is maintained constant, the volume of a particular mass of gas varies in person with the true temperature of the gas.  The volume of a specific quantity of a gas is inversely related to its pressure at constant temperature.

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There are 1.5×10^23 molecules molecules of potassium nitrate are in a 25 g sample.

molecules of KNO3 = 25gKNO3 x 1mol/101.11gKNO3 x 6.022x10^23 molecules/1mol = 1.5 x 10^23 molecules.

Molecules are made up of one or more atoms. If they contain more than one atom, the atoms can be the same (an oxygen molecule has two oxygen atoms) or different (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules, such as proteins and DNA, can be made up of many thousands of atoms.

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Answer:

Theoretical yield of alum = 24.239 g

Note: No data was provided. The calculations are based on assumed data

Explanation:

Equation of reaction for the production of alum is given below:

2Al + 2KOH + 22H₂0 + 4H₂SO₄ --> 2[KAI(SO₄)₂.12H₂O] + 3H₂

Theoretical is the maximum amount of product that can be theoretically produced by a limiting reactant usually obtained from the calculations using the equation of reaction. The limiting reactant is the reactant that gets used up during the course of the reaction, hence, the reaction stops.

From the equation of reaction, the mole ratio of aluminum to alum is 1:1.

Assuming aluminum is the limiting reactant and the other reactants are in excess in the equation above, and 1.3807 grams of aluminum was used for the reaction, the theoretical yield of alum can be calculated thus;

molar mass of aluminum = 27.0 g/mol; molar mass of alum = 474 g/mol

Number of moles of aluminum present in 1.3807 g = 1.3807 g/ 27 g/mol = 0.051137 moles

Therefore, number of moles of alum produced = 0.051137 moles

mass of o.051137 moles of alum= 0.051137 moles * 474 g/mol =24.239 g

Therefore, theoretical yield of alum = 24.239 g

Answer:

The answer is steam of fossil fuels

Answer:

Nicotine is classified as a stimulant drug.

Answer:its c and d

Explanation:

Answer

1.0 mol

Explanation

Given:

Volume, V = 5.0 L

Temperature, T = 215 K

Pressure, P = 342 kPa

The gas constant, R = 8.31 L kPa/mol K

What to find:

The number of moles of the gas sample.

Step-step-solution:

The number of moles of the gas can be determine using the ideal gas equation formula:

Put the given values into the formula and calculate for n:

The number of moles of the gas sample is 1.0 mol.

Answer:

Negatively charged ion.

Explanation:

Example:

Oxygen is an element containing negatively charged ions. Its valence number is minus 2.

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Answer:

Nonpolar molecules dissolve in nonpolar solvents through a process called dispersion forces or London forces.

In nonpolar molecules, the electrons are evenly distributed and there is no permanent dipole moment, which means that the molecule has no positive or negative poles. When nonpolar molecules are added to a nonpolar solvent, such as oil or hexane, the molecules are attracted to one another due to London dispersion forces.

London forces are due to temporary fluctuations in electron density within molecules, creating temporary dipoles. These temporary dipoles induce corresponding temporary dipoles in other nearby molecules, attracting them to each other. The strength of the London dispersion forces increases with the size of the molecule, since larger molecules have more electrons and a greater potential for temporary dipoles.

In general, nonpolar molecules bind together in nonpolar solvents through these weak intermolecular forces, allowing them to dissolve and form a homogeneous solution.

Explanation:

\(n=\dfrac{m}{M}\) where n is moles, m is mass and M is molar mass.

To solve for mass, isolate m:

\(m=nM\)

Input given information:

\(m=5.8*58.44\\m=338.952\\m=340\)

There are 340 g in 5.8 mol of NaCl.

The correct statement that describes the relationship between thermal energy and particle movement is "As thermal energy increases, there is more particle movement".

WHAT IS THERMAL ENERGY?

Hence, as thermal energy of substance increases, there is more particle movement of that substance.

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Answer:

Ar(Mg)=24g

Ar(Cl)=35,5 and Cl2=35,5×2=71g

m=24g+71g=95g

The process of determining an approximate computed age based on the proportions of carbon isotopes present is called radiocarbon dating or carbon dating.

Radiocarbon dating is a method used to determine the age of an object containing organic material by measuring the amount of the radioactive isotope carbon-14 in the object.

Carbon-14 is a radioactive isotope of carbon that is produced in the upper atmosphere when cosmic rays collide with nitrogen atoms. When living organisms absorb carbon from the atmosphere through photosynthesis or consumption of other organisms, they incorporate a certain amount of carbon-14 into their bodies. After an organism dies, the amount of carbon-14 in its body begins to decay at a known rate, with a half-life of about 5,700 years.

Radiocarbon dating is based on the assumption that the proportion of carbon-14 in the atmosphere has remained constant over time. This assumption is generally considered valid for the past 50,000 years. Radiocarbon dating can be used to determine the age of materials such as wood, charcoal, bone, shell, and other organic remains.

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The rate of diffusion of butane gas at the same temperature is approximately 240 m/s.

The rate of diffusion of a gas is directly proportional to its velocity at a given temperature. Therefore, we can use the ratio of the velocities of neon and butane gases to estimate the rate of diffusion of butane gas.

The molar mass of neon is 20.18 g/mol, and the molar mass of butane is 58.12 g/mol. Since both gases are at the same temperature, their velocities are proportional to the square root of the ratio of their molar masses:

\(\sqrt{(20.18 g/mol / 58.12 g/mol) }\)≈ 0.534

Therefore, we can estimate that the rate of diffusion of butane gas is about 0.534 times the velocity of neon gas. Multiplying the velocity of neon gas by this ratio, we get:

449 m/s x 0.534 ≈ 240 m/s

So, we can estimate that the rate of diffusion of butane gas at the same temperature is approximately 240 m/s.

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Warm front Forms when a moist, warm airmass slides up and over a cold air mass. As the warm airmass rises, it condenses into a broad area of clouds. A warmfront brings gentle rain or light snow, followedby warmer, milder weather.

Among the given oxides, option (d) NiO is the oxide that would be expected to form a substitutional solid solution with complete solubility with MnO.

Substitutional solid solutions occur when atoms of one element replace atoms of another element in a crystal lattice. For complete solubility to occur, the two elements should have similar atomic sizes and similar chemical properties.

In this case, among the given options, NiO (nickel oxide) is the oxide that is most likely to form a substitutional solid solution with MnO (manganese oxide) with complete solubility. This is because nickel (Ni) and manganese (Mn) have similar atomic sizes and similar chemical properties. Both elements belong to the transition metals and have comparable electronic configurations.

On the other hand, options (a) MgO (magnesium oxide), (b) CaO (calcium oxide), and (c) BeO (beryllium oxide) are less likely to form substitutional solid solutions with complete solubility with MnO. These oxides contain elements that have significantly different atomic sizes and chemical properties compared to manganese, which makes complete solubility less likely.

Therefore, based on atomic size and chemical properties, NiO would be expected to form a substitutional solid solution with complete solubility with MnO.

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