A student wrote a chemical equation as shown.

2H₂S+ 302 H₂O + SO₂

What should the student do to balance the equation?

One mole of  sucrose stores 5878 KJ of energy. Then 10000J or 10 kJ is stored by 0.0017 moles or 0.58 g of sucrose.

Sucrose is a disaccharide formed from one glucose and one fructose units. Sucrose is used as the table sugar. Sucrose can store the chemical energy as well as it can release it through decomposition.

One mole of sucrose stores an energy of 5878.8 KJ.

molar mass of sucrose = 342. 3 g/mol

then, no.of moles of sucrose which stores 10 KJ energy = 10 /5878.8 = 0.0017 moles.

Mass of 0.0017 moles = no.of moles × molar mass

mass = 0.0017 × 342.3 g/mol = 0.58 g.

Therefore, 0.58 g of sucrose stores 10 J of energy.

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The work would become four times if the spring is stretched twice , as the work done while stretching a spring is proportional to the force times the distance therefore the correct answer is option C.

The spring constant is used to define the stiffness of the spring, the greater the value of the spring constant stiffer the spring, and it is more difficult to stretch the spring.

Since the work involved in extending a spring is proportional to the force times the distance, option C is the right response. If the spring is stretched twice, the effort would increase by a factor of four.

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When water particles in their gaseous state lose enough energy, the gaseous state of water converts to the liquid state as the kinetic energy of particles decreases.

In the gaseous state, water molecules have higher kinetic energy compared to the liquid state. When water particles lose energy, typically through cooling or condensation, their kinetic energy decreases. As a result, the water molecules slow down and come closer together, forming intermolecular forces that enable them to condense into the liquid state.

This phase transition occurs when the average kinetic energy of the water particles decreases below a certain threshold, allowing them to transition from the highly mobile and energetic gaseous state to the more ordered and cohesive liquid state.

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Answer:

Mass = 32 grams

Explanation:

Given:

Mole = 1 mol

Molar Mass = 32 g

Required:

Mass in grams = ?

Solution:

Mass in grams = Moles × Molar mar

Mass = 1 × 32

Mass = 32 grams

Cinnabar is a mineral and Limestone is a rock.

A limestone is a type of sedimentary rock, meaning that it was created as a result of sediments that were transported by water or wind and deposited on top of other rocks; in this case, the sediments were small seashell fragments and ocean debris. It is easily found in crystalline waters at shallow depths and is a chemical compound called calcium carbonate.

The chemicals that make cinnabar, a non-metallic mineral compound, dangerous for people are 85% mercury and 15% sulfur. It is a mineral with a brilliant red color that is created by various reactions and materials present in hot water.

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Hard hats were originally made from leather, but in modern times, they are mostly made from rigid plastic and other synthetic materials. This transformation was necessitated by the requirements of the Occupational Safety and Health Administration (OSHA).

In the United States, hard hats are mandatory for any job site in which workers may come into contact with falling objects or hazardous materials. OSHA developed these criteria to protect workers' safety on construction sites and other potentially hazardous locations.

These materials were cheaper to produce, and they offered comparable levels of protection. As a result, hard hats became more affordable and more widely used in industrial and construction settings. Today, most hard hats are made from rigid plastic or similar materials. These materials are lightweight, durable, and easy to shape into different styles and designs. They also provide excellent protection from falling objects and other hazards.

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Answer:

Explanation:

The percent composition of carbon in acetic acid is 40.002%.

Answer:

It is Double Replacment

Explanation:

They traded bonds.

Balanced Equation is 2AgNO3 + CaCl2 = 2 AgCl +1Ca(NO3)2

Answer:

B). Electrons are more attracted to the oxygen atom, so there is a partial negative charge on the oxygen atom.

Explanation:

The above statement most aptly describes the polarity or uneven distribution of the density of electrons. In water, two hydrogen atoms and one atom of oxygen leading to the formation of polar covalent bonds. Thus, there is the presence of a partial negative charge close to the oxygen atom and partial positive charge near the hydrogen atom as the former has unshared pair of electrons. This polarity of water allows it to dissolve sugar or other ionic substances in it. Thus, option B is the correct answer.

Answer:

The moon is closer to earth

Explanation:

Around each new moon and full moon, the sun, Earth, and moon arrange themselves more or less along a line in space. Then the pull on the tides increases, because the gravity of the sun reinforces the moon's gravity. ... Thus, at new moon or full moon, the tide's range is at its maximum.

Answer:

A. Sympathetic

and

C. Parasympathetic

Explanation:

Ap3x

a)  The volumetric flow rate of air entering the furnace is approximately 20.78 \(m^3/h.\)

b) the rate of heat transfer from the furnace is approximately 15,600 kJ/h.

To solve this problem, we need to apply the principles of stoichiometry and energy balance. Let's break it down step by step:

a.)  To determine the volumetric flow rate of air, we'll use the stoichiometry of the combustion reaction. Methane (\(CH_4\)) burns completely with air according to the following balanced equation:

\(CH_4\)+ 2 ( \(O_2\)+ 3.76 \(N_2\)) -> \(CO_2\)+ 2 \(H_2O\) + 7.52 \(N_2\)

Since we're given that the methane flow rate is 27 m^3/h, we can set up the equation:

27 \(m^3/h.\) \(CH_4\)* (2 + 3.76) = Air flow rate * 7.52

Simplifying, we find:

27 * 5.76 = Air flow rate * 7.52

Air flow rate = (27 * 5.76) / 7.52 ≈ 20.78 m^3/h

Therefore, the volumetric flow rate of air entering the furnace is approximately 20.78 \(m^3/h.\).

b. To determine the rate of heat transfer from the furnace, we'll use the energy balance equation. The energy balance can be expressed as follows:

Q = m_air * Cp_air * (T_exit_air - T_enter_air)

Where:

Q is the rate of heat transfer (in kW),

m_air is the mass flow rate of air (in kg/h),

Cp_air is the specific heat capacity of air (assumed constant at around 1.005 kJ/kg·°C),

T_exit_air is the exit temperature of air (427°C),

T_enter_air is the entering temperature of air (127°C).

To convert the volumetric flow rate of air to mass flow rate, we'll need to consider the density of air at the given conditions. At 127°C and 1 atm, the density of air is approximately 0.941 kg/m^3.

m_air = Air flow rate * Density_air = 20.78 m^3/h * 0.941 kg/m^3 = 19.53 kg/h

Now we can substitute the values into the energy balance equation:

Q = 19.53 kg/h * 1.005 kJ/kg·°C * (427°C - 127°C) = 15,600 kJ/h

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Answer: A white precipitate of silver sulfate (Ag2SO4) is formed.

Explanation:
When aqueous silver nitrate (AgNO3) reacts with aqueous potassium sulfate (K2SO4), a double displacement reaction occurs. The cations and anions of the two compounds switch places to form two new compounds, which are potassium nitrate (KNO3) and silver sulfate (Ag2SO4).

AgNO3 + K2SO4 → Ag2SO4 + 2KNO3

The insoluble product of this reaction is silver sulfate (Ag2SO4), which appears as a white precipitate. This reaction is commonly used to detect the presence of sulfate ions in solution, as the formation of the silver sulfate precipitate confirms the presence of sulfate ions.

Answer:

A

Explanation:

particles are frozen and hence will vibrate in their fixed positions

Answer:

c because this is the one hundred all the time

Explanation:

The true statement is that; Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction. Option C

We have to note that the distance has to do with the distance that is covered but the direction is not involved. If we are looking at the displacement, we would be talking about the distance that is covered in a specific direction.

Now we have to put this in perspective as we look at the table, it is clear that we know that the displacement of  Logan and Jasmine have the same distance but in opposite direction.

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Answer:

C

Explanation:

took on eddge

The radiation emitted by an isotope undergoing radioactive decay is charged and has no mass.

Correct option is B.

This means that the radiation consists of particles with a negative charge, such as electrons or positrons, which are released during the decay process. Due to the lack of mass, these particles can travel at very high speeds, making them highly penetrating and able to pass through many materials. This is why some shielding is required to protect people and other living things from the radiation.

The particles' high penetrating power also makes them useful in certain medical procedures, such as CT scans and other imaging techniques, as they can pass through the body to create an image. However, it is important to use the correct shielding to protect people from the radiation when it is used in this way.

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The tendency of a polymer to crystallize decreases with increasing molecular weight. This is because as the chain length increases, it becomes more difficult to align along adjacent chains to produce a regular arrangement of atoms.

Polymer is a material or substance made up of repeating units called a monomer.The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.

Therefore, The tendency of a polymer to crystallize decreases with increasing molecular weight is because as the chain length increases, it becomes more difficult to align along adjacent chains to produce a regular arrangement of atoms.

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Carbon Dioxide (CO2) and Methane (CH4) are greenhouse gases that contribute to the phenomenon of global warming. These gases trap heat in the Earth's atmosphere, leading to an increase in the planet's average temperature. The correct answer is 1.

Carbon dioxide is produced by the burning of fossil fuels, such as coal, oil, and gas, as well as deforestation and other land use changes. Methane is mainly produced by natural processes such as wetland formation, as well as human activities such as agriculture, livestock farming, and oil and gas production. The concentration of these gases in the atmosphere has been steadily increasing over the past few centuries, leading to significant impacts on planet's climate and ecosystems. Hence correct answer :1.

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Answer:

d = 3 g/cm³

Explanation:

Given data:

Mass of stone = 27 g

Volume of water = 10 cm³

Volume of water+ stone = 19 cm³

Volume of stone = ?

Density of stone = ?

Solution:

Volume of stone = total volume - volume of water

Volume of stone = 19 cm³ -  10 cm³

Volume of stone = 9 cm³

Density of stone:

d = m/v

d = 27 g/ 9 cm³

d = 3 g/cm³

When 8.0 g of N₂H₄ (32 g mol⁻¹) and 92 g of N₂O₄ (92 g mol⁻¹) are mixed and react according to the equation above, the maximum mass of H₂O that can be produced is 9 g.

The equation of the reaction of N₂H₄ and N₂O₄ is given by,

2N₂H₄ (g) + N₂O₄ (g) ↔3N₂ (g) + 4H₂O (g)

Mass of N₂O₄ is given by = (2×14+4×16)                                            

                                          = 92 g            

Mass of N₂H₄ is given by = 2 (2×14+4)                                            

                                          = 64 g

As per the stochiometric equation, 64 g of N₂H₄ reacts with 92 g of N₂O₄  8 g of N₂H₄ reacts with

= 92/64 × 8 =11.5 g of N₂O₄

But the given amount of N₂O₄ is 92 g. So N₂H₄ acts as a limiting reagent.

64 g of N₂H₄ gives

4 × 18 = 72 g of water

8 g of N₂H₄ gives

72/64 × 8 = 9 g of water

The mass of water is 9g.

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Answer:

Explanation:

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From your dear daughter or son

Systematic name for each of the following compounds are C49H74O4, C49H74O4, C49H74O4 respectively.

What is natural compound?

Pure compounds are created while factors integrate permanently, forming one substance. For example, while the factors mercury and oxygen integrate, and a chemical response takes place, mercury (II) oxide is created.

A chemical compound is a chemical substance composed of many equal molecules containing atoms from multiple chemical detail held collectively with the aid of using chemical bonds. A molecule which includes atoms of most effective one detail is consequently now no longer a compound

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Solution :

From the balanced chemical equation, we can say that 1 moles of KBr will produce 1 moles of KCl .

Moles of KBr in 102 g of potassium bromide.

n = 102/119.002

n = 0.86 mole.

So, number of miles of KCl produced are also 0.86 mole.

Mass of KCl produced :

\(m = 0.86 \times Molar \ mass \ of \ KCl\\\\m = 0.86 \times 74.5 \ gram \\\\m = 64.07\ gram\)

Hence, this is the required solution.

The statement is true  about the rotational period of the moon " the rotational period of the moon is equal to the revolution period around Earth."

A celestial object's rotation period may relate towards its sidereal rotation period, which is the time it takes for the object to complete one revolution around in its axis of rotation in sidereal seems like to the background stars.

The orbital period is also known as the revolution period. it takes for one astronomical object to complete one cycle around another. It refers to planets and asteroids orbiting the Sun, moons orbiting planets, planetary systems orbiting other stars, or double stars in astronomy.

In the night sky, the moon is just the brightest object. The moon doesn't at all produce its own light. It has no radiance. That is visible because the sun's light bounces off of it.

The rotational period of the moon is equal to the revolution period around Earth because the moon's rate of spin becomes tidally locked to its rate of revolution, it maintains the same face oriented towards the Earth In other words, every time the moon rounds the Earth, it rotates exactly once.

Therefore, the rotational period of the moon is equal to the revolution period around Earth will be correct answer.

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Answer:

This is not a question

Explanation:

no

The liquid will reach equilibrium with its vapor phase and at that point, the mass of the liquid will be around 43.3 grams.

To determine the mass of the liquid once equilibrium is reached, we need to consider the vapor pressure and the volume of the flask.

Given:

Molar mass of compound X: 84.91 g/mol

Vapor pressure of compound X: 565 mmHg

Temperature: 24°C

Mass of compound X introduced: 50.0 g

Volume of the flask: 15.0 L

First, we need to calculate the number of moles of compound X introduced into the flask:

Number of moles = Mass / Molar mass

Number of moles = 50.0 g / 84.91 g/mol ≈ 0.589 mol

Next, we can calculate the partial pressure of compound X in the flask using the ideal gas law:

PV = nRT

Where:

P = Partial pressure of compound X

V = Volume of the flask

n = Number of moles of compound X

R = Ideal gas constant (0.0821 L·atm/mol·K)

T = Temperature in Kelvin

Converting the temperature from Celsius to Kelvin:

T = 24°C + 273.15 = 297.15 K

Solving for the partial pressure (P):

P = nRT / V

P = (0.589 mol)(0.0821 L·atm/mol·K)(297.15 K) / 15.0 L ≈ 0.917 atm

Now, we need to find the mass of the liquid at equilibrium. At equilibrium, the liquid and vapor phases are in dynamic equilibrium, and the total pressure in the flask is equal to the vapor pressure of the compound.

Since the vapor pressure is given as 565 mmHg, we need to convert it to atm:

Vapor pressure = 565 mmHg × (1 atm / 760 mmHg) ≈ 0.7434 atm

The total pressure in the flask is the sum of the partial pressure of the compound and the vapor pressure:

Total pressure = Partial pressure + Vapor pressure

Total pressure = 0.917 atm + 0.7434 atm ≈ 1.66 atm

At equilibrium, the mass of the liquid can be calculated using the ideal gas law:

PV = nRT

Solving for the mass (M):

M = (Total pressure × Volume) / (R × Temperature)

M = (1.66 atm)(15.0 L) / (0.0821 L·atm/mol·K)(297.15 K) ≈ 43.3 g

Therefore, the mass of the liquid at equilibrium is approximately 43.3 g.

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When you need to generate aggregate values (such a sum) and then use them in another query, a derived table can be helpful.

A table expression that appears in a query's FROM clause is referred to as a derived table. When using column aliases is not possible because another clause is being processed by the SQL translator before the alias name is available, you can use derived tables instead.

A sort of subquery known as a derived table is enclosed in parenthesis, given a name, and placed in the from clause of an outer select expression. A result set from a select statement is returned by the subquery.

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