What is in catalytic converter that makes it valuable.

Heliocentric model of the solar system state the sun is assumed to lie at or near a central point and the earth and other bodies revolve around it.

Heliocentrism is the astronomical model developed by Nicolaus Copernicus and published in 1543 and this model postulate that the sun at the center of the universe with Earth and the other planets orbiting around it in circular paths and main heliocentric means earth revolve around the sun is called as heliocentric theory

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Answer:

Na + Cl is a synthesis reaction so their product would only just be NaCl

Also, chlorine is a diatomic molecule it should be Na + Cl2 ---> NaCl

Balanced equation:

2Na + Cl2 -----> 2NaCl

The student that had the most accurate and precise data is Mel (option D).

Accuracy is the degree of conformity of a measure to a true or standard value i.e. closeness to a standard or true value.

On the other hand, precision is the ability of a measurement to be reproduced consistently i.e. the closeness of measured values.

According to this question, students calculated the mass in grams of the baking soda being used.

It can be said that Mel, which measured the following values: 0.44g, 0.46g, 0.45g had the most accurate and precise value because they are both close to themselves and the true value.

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Answer:

D

Explanation:

Mel

The volume increases to be the temperature rises, as well as decreases to be the temperature decreases.

These examples of a consequence of temperature on the volume for a given amount of a confined gas at constant stress are true in general: The volume increases to be the temperature rises, as well as decreases to be the temperature decreases. If the temperature measured in kelvin, volume as well as temperature remain directly proportional.

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The approximate atomic radius of nickel is 1.532 × 10^(-8) cm.

In a cubic unit cell, the body diagonal length (diagonal that passes through the center of the unit cell) is equal to four times the atomic radius (4r). We can use this relationship to find the atomic radius of nickel.

Given: Edge length of the unit cell (a) = 3.524 × 10^(-8) cm

The body diagonal length is given by:

Diagonal length (d) = a√3

Substituting the given values:

d = (3.524 × 10^(-8) cm) × √3

Now, we can calculate the atomic radius (r) by dividing the diagonal length by 4:

r = d / 4

Performing the calculations:

r = [(3.524 × 10^(-8) cm) × √3] / 4

r ≈ (3.524 × 10^(-8) cm) × (1.732 / 4)

r ≈ 1.532 × 10^(-8) cm

Therefore, the approximate atomic radius of nickel is 1.532 × 10^(-8) cm.

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Answer:

n = Initial volume/22.4L

Explanation:

The molar concept is simply one that is used to find the Number of moles and explain the relationship it has with avogadro's number, molecular mass, molar mass e.t.c.

Now, in terms of molar mass, number of moles is given by the formula;

n = mass of the sample/molar mass

In terms of avogadro's number, number of moles is;

1 mole = avogadro's number = 6.02 × 10^(23)

Now, when dealing with ideal gases, the molar volume of an ideal gas is 22.4 L.

Now the relationship between this volume and the mole concept is that the number of moles is gotten by dividing the initial volume by this molar volume.

Thus;

n = Initial volume/22.4L

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:

the answer is 35mg and 58ml

The notation for the enthalpy of the solution is ∆Hsol. The correct answer is option ∆Hsol.

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Answer: Mass takes into account the force of gravity.

Explanation:

Answer:

In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Showing that Mass cannot be created nor destroyed in a chemical reaction

Explanation:

Answer:

sound energy

Explanation:

Answer:

Chemical energy

Explanation:

Answer:

ductility

Explanation:

It is a mechanical property

a) ionic

chlorine is present in top of group 17 and right of period 3 and

electronegativity(the tendency to gain electrons)

increases up the group and right the group.

so it has high tendency to form anion.

In the same way both Na and K are present up the group and left side and the tendency to lose electrons in both becomes high and they tend to form cation.

Answer:

Electrochemical cells typically consist of two half-cells. The half-cells separate the oxidation half-reaction from the reduction half-reaction and make it possible for current to flow through an external wire.

Explanation:

In particular, it accomplishes the: anti-addition of H2 to an alkene, meaning that the hydrogen atoms are added to opposite sides of the double bond. This reaction is called the Wilkinson hydrogenation.

Wilkinson's catalyst is a transition metal complex used in homogeneous catalysis. It is a rhodium complex, commonly used to catalyze the hydrogenation of alkenes.

The reaction is initiated by coordination of the alkene to the rhodium complex. The complex then undergoes oxidative addition of dihydrogen, producing a hydride complex. The hydride complex adds to the coordinated alkene, producing a rhodium alkyl complex.

The final step is reductive elimination of the alkane and the regenerated rhodium complex. The overall result is the addition of two hydrogen atoms to the alkene, anti to each other.

The other listed syntheses, such as syn addition of H2 to an alkene or dihydroxylation, are achieved through different reaction mechanisms and different catalysts.

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The specific heat capacity of the metal when the temperature rises by 12.4°C is 3.569 J/g°C.

Specific heat capacity is defined as the heat capacity of the substance divided by the mass of the substance.It is the amount of heat added to one unit mass of substance to increase it's temperature by one unit.The SI unit is joule per kelvin per kilogram.

It varies with temperature and for each different state of matter it is different.Specific heat capacity of a substance is higher when it is allowed to expand as a result of  heating.It is measured by a technique called differential scanning calorimetry.

It is calculated by the given formula,

W=mcΔt

where W=energy supplied

m= mass of substance

c=specific heat capacity

Δt= temperature change

Substituting the values given in the problem in the above equation,

c=43.6/0.985×12.4=3.569 J/g°C

Thus, the specific heat capacity of metal is 3.569 J/g°C.

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Answer:

1514g of CO₂ reacted

Explanation:

Based on the reaction:

2CO₂ + 43.9kJ → 2CO + O₂

2 moles of carbon dioxide require 43.9kJ of energy to produce 2 moles of carbon monoxide and 1 mole of oxygen

To solve this question, we must convert the 755kJ of energy to moles of carbon dioxide that reacts and to find the mass as follows:

755kJ * (2 moles CO₂ / 43.9kJ)  =34.4 moles of CO₂ are produced

Mass CO₂: Molar mass: 44.01g/mol

34.4 moles CO₂ * (44.01g / mol) =

The formation of salt crystals on a hot day by the Great Salt Lake is a physical change. This is because the process does not involve a chemical reaction that changes the composition of the salt. The heat simply causes the water to evaporate, leaving behind the salt crystals.

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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The type of mass movement that is LEAST coherent (most like a fluid) is a mudflow. The correct option is d.

Mass movement refers to the downhill movement of earth materials due to gravity. There are different types of mass movement, including slump, rockslide, creep, and mudflow. The coherency of a mass movement refers to the degree of internal strength or viscosity of the material involved.

The more coherent the material, the less it flows like a fluid. Among the given options, mudflow is the least coherent or most fluid-like type of mass movement. Mudflow refers to the rapid downhill movement of a mixture of water and fine-grained sediment, such as clay and silt.

Mudflows are highly fluid and can travel at high speeds, posing a significant hazard to life and property in areas prone to landslides and flash floods. In contrast, slumps, rockslides, and creep involve more cohesive materials and exhibit less fluid-like behavior. Therefore, the correct option is d.

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Answer:

Project scope statement?

Explanation:

it's good one just do research on it

The direction in which the wind will blow in this situation is from the ocean to the coast and is denoted as option A.

This is defined as the force per unit area of a body and the unit is Pascal. We were told that air pressure above a large body of water is higher than the air above the coast.

This will make the wind blow from the ocean to the coast as the ocean has a higher pressure.

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Answer:

4.64 × 10⁻²¹ J/s

Explanation:

[Only if the wave travels at the speed of light]

Because a wave presumed to be at light speed is a photon, E = hf.

If frequency is not given, E = hc/λ

c is the speed of light in meters per second. c = 299, 792, 458 m/s.

λ is the wavelength which is dependent.

h or plancks constant = 6.62607004 × 10⁻³² m² kg / s.

E is in units of J / s or jules ( m² kg ) per second.

If the wave has a frequency of 7.0 x 10¹² Hz or 7 THz (Tera-Hertz).

E = (6.62607004 × 10⁻³⁴) × (7.0 × 10¹²) =

46.38249028 × 10⁻²² =

4.638249028 × 10⁻²¹ J/s ≈

4.64 × 10⁻²¹ J/s

a) The temperature of the system when thermal equilibrium is reached will be 0°C.

b) 30 g of ice will be present when thermal equilibrium is reached.

mass of ice (m1) = 50.0 g

Temperature of ice (T1) = -22.0°C

Mass of water (m2) = 120.0 g

Temperature of water (T2) = 7.0°C

The energy required to melt the ice is given by the equation,

Q1 = m1 × Lf

Where, Lf is the latent heat of fusion of ice = 334 J/g

Q1 = 50.0 × 334Q1 = 16700 J

The energy required to heat the ice from -22°C to 0°C (Q2) is given by,

Q2 = m1 × c × (0-(-22))

Where, c is the specific heat capacity of ice = 2.06 J/g°C

Q2 = 50.0 × 2.06 × 22Q2 = 2266 J

The energy lost by water (Q3) is given by the equation,

Q3 = m2 × c × (7 - 0)

Where, c is the specific heat capacity of water = 4.184 J/g°C

Q3 = 120 × 4.184 × 7Q3 = 35244.48 J

Total energy gained (Q4) by ice and water is equal to the energy lost by the water.

Q4 = Q1 + Q2

Q4 = 16700 + 2266

Q4 = 18966 J

18966 = Q3 = m2 × c × (7-0)

18966 = 120 × 4.184 × 7

m2 = 18966/(120 × 4.184 × 7)

m2 = 3.03 g

At equilibrium, the mass of the remaining ice (m3) can be calculated as follows,

Q1 + Q2 = m3 × Lf + m3 × c × (0 - 0°C)

16700 + 2266 = m3 × 334 + m3 × 2.06 × (0 - (-22))

m3 = 30 g

Therefore, the temperature of the system when thermal equilibrium is reached will be 0°C, and the mass of the ice remaining at equilibrium will be 30 g.

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Compounds are made up of two or more bound elements.

Here, H2O, CO2, CH4 are Compounds.

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276.44  is the molecular weight of the product of the reaction between anthracene and maleic anhydride given that Diels-alder reactions have 100% atom economy.

In this assignment, you will learn how to create a bridging polycyclic anhydride using the Diels-Alder method. Maleic anhydride and anthracene are two compounds that will dissolve in xylene and reflux. Utilizing vacuum filtering, the product 9,10-dihydroanthracene-9,10-succinic anhydride will be recovered and separated.

Anthracene and maleic anhydride in the Diels-Alder process.

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