how much energy is released when carbon dioxide is created

Explanation:

Copper (II) sulfate is usually present as a hydrous state, which is of the form CuSO4 * nH2O, where n is a whole number.

Mass of sample (CuSO4 * nH2O)

= 152.00g - 128.10g = 23.90g.

Mass of water loss during heating

= 152.00g - 147.60g = 4.40g.

Molar mass of H2O = 18g/mol

Moles of H2O in sample

= 4.40g / (18g/mol) = 0.244mol.

Mass of anhydrous sample (CuSO4)

= 23.90g - 4.40g = 19.50g

Molar mass of CuSO4 = 159.61g/mol

Moles of CuSO4 in sample

= 19.50g / (159.61g/mol) = 0.122mol.

Since mole ratio of CuSO4 to H2O

= 0.122mol : 0.244mol = 1:2, n = 2.

Hence we have CuSO4 * 2H2O.

Answer:

Copper(II) Sulphate (CuSO4.7H2O) is generally present in a hydrated form.

Mass of the CuSO4.7H2O sample before heating

(152.00-128.10)g = 23.90 grams

Mass of the water loss due to heating

(152.00-147.60)g = 4.40 grams

The density of the metal is 1.167 g/ml.

The density of the metal can be calculated using the formula for density, ρ:

ρ = m /v

where ρ is the density, m is the mass, and v is the volume.

In this case, the mass of the metal is 31.5g and the volume can be determined by subtracting the initial volume (51mL) from the final volume (78mL) of water in the graduated cylinder. Thus, the volume of the metal is 27mL.

Using the formula, the density of the metal is then:

ρ = 31.5 g / 27mL

ρ = 1.167 g/ml

This means that 1 mL of the metal has a mass of 1.167g. Density is an important property of materials, as it affects other properties such as buoyancy. Generally, materials with a higher density will sink in a liquid, while those with a lower density will float.

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Explanation:

The Answer is a reaction between two acids

Answer:

The correct answer is:

a) Saturated.

When salt is added to water until no more salt can be dissolved, it forms a saturated solution. A saturated solution is a solution in which the maximum amount of solute has been dissolved at a given temperature and pressure, and no more solute can dissolve. It is in a state of dynamic equilibrium, with solute particles constantly dissolving and precipitating at the same rate.

The energy separation of the levels in responsible for the emission is  0.0563 kJ/mol, 0.0563 kJ/mol, 2.105 eV.

E = (hc)/λ

Where h is Planck’s constant, c is the speed of light, λ is the wavelength of the emitted radiation.

Substitute the values in the above formula:

Planck's constant, h = 6.626 × \(10^-^3^4\)J·s

Speed of light, c = 2.998 × \(10^8\) m/s

Wavelength,λ = 590 nm = 590 ×\(10^-^9\) m

E = (6.626 ×\(10^-^3^4\)J·s × 2.998 × 10^8 m/s)/590 × \(10^-^9\)m

E = 3.376 × \(10^-^1^9\) J

Hence, the energy separation of the levels in responsible for the emission is 3.376 × \(10^-^1^9\)J (Joules).

To calculate the energy separation of the levels in kJ/mol, we need to convert Joules into kJ/mol. We know that 1 J = 0.001 kJ and 1 mol = 6.022 × 10^23 particles.

So,3.376 ×\(10^-^1^9\)J = (3.376 ×\(10^-^1^9\)J / 6.022 ×\(10^2^3\)) × (6.022 × \(10^2^3\))

Therefore, 3.376 × \(10^-^1^9\) J = 0.0563 kJ/mol.

Hence, the energy separation of the levels in responsible for the emission is 0.0563 kJ/mol.

To calculate the energy separation of the levels in eV, we need to convert Joules into eV.

We know that 1 J = 6.242 × \(10^1^8\) eV.

So,3.376 × \(10^-^1^9\) J = 3.376 × \(10^-^1^9\) J × (6.242 ×\(10^1^8\) eV/1 J)

Therefore, 3.376 ×\(10^-^1^9\)J = 2.105 eV.

Hence, The energy separation of the levels in responsible for the emission is  0.0563 kJ/mol, 0.0563 kJ/mol, 2.105 eV.

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The equilibrium constant of the system is 11.3.

We know that the equilibrium constant shows the extent to which reactants are converted into products.

Now;

2NO2 ⇄ N2O4

[NO2] = 0.500 mol /1 L =  0.500 M

[N2O4] =  0.186 mol  /1 L =  0.186 M

The ICE table is;

          2NO2 ⇄ N2O4

I           0.5           0

C         -2x              +x

E          0.5 - 2x     0.186

The concentration of NO2 at equilibrium = 0.5 - 2(0.186) = 0.128

Keq =  0.186/( 0.128)^2

Keq = 11.3

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Answer:

3

Explanation:

3 x H = 3H

Answer:

its ability to lose electron

The reactivity of an alkali metal is determined by its ability to loose electrons.

The alkali metals are highly electropositive. They easily loose electron to form a univalent positive ion.

This ability to form a univalent positive ion increases down the group hence cesium is the most electropositive element in nature.

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Answer:

C

Explanation:

d=300

t=6hr

speed=?

speed=300/6

speed=50m/hr the important thing in this question is to get the right units

Answer:

c,b not sure,c,v,b hope it will help u

Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

Diels-Alder Reaction   Diels-Alder reaction is a chemical process that joins a conjugated diene with a dienophile (a compound containing a double bond) to form a six-membered ring called a cyclohexene ring. It is a chemical reaction that can be used to make new carbon–carbon bonds. The reaction was discovered by two German scientists, Otto Diels and Kurt Alder, in 1928.In the Diels-Alder reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride, the % recovery was calculated using the following data:Weight of maleic anhydride used: 185 mg = 0.185 gVolume of diene used: 0.215 mLWeight of cyclic anhydride crystals recovered: 0.251 g% Recovery:We can calculate the percent recovery using the following formula:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100The theoretical yield of the product can be calculated from the balanced chemical equation as follows:2,3-dimethyl-1,3-butadiene + Maleic Anhydride → Cyclohexene-1,2-dicarboxylic AnhydrideThe molar mass of 2,3-dimethyl-1,3-butadiene is 68 g/mol. The molar mass of Maleic Anhydride is 98 g/mol. The molar mass of Cyclohexene-1,2-dicarboxylic Anhydride is 146 g/mol.Using these values, we can calculate the number of moles of each reactant: moles of diene used = (0.215 mL)(0.788 g/mL)/(68 g/mol) = 0.00248 mol moles of maleic anhydride used = 0.185 g/98 g/mol = 0.00189 mol The theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 1 mol/1 mol = 0.00189 molThe theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 146 g/mol = 0.27594 gNow, we can substitute these values into the percent recovery equation:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

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Answer: B. C and A.

Explanation:

Answer:

The mathematical equation, N = n × NA, can be used to find the number of atoms, ions or molecules in any amount (in moles) of atoms, ions or molecules: 10 moles of helium atoms = 10 × (6.022 × 1023) = 6.022 × 1024 helium atoms.

Explanation:

The classification of examples into potential energy and kinetic energy are given below.

1. standing at the top of a

slide- potential energy.

2. wind up for the pitch- potential energy.

3. juice in an orange- potential energy.

4. move downhill in a roller

coaster- kinetic energy.

5. roll down a grassy hill- Kinetic energy.

6. an unburned lump of

coal- potential energy.

7. throw a curve ball- kinetic energy.

8. a battery- potential energy.

9. frog leaping into the

water- kinetic energy.

10. book falls from a high

shelf- potential energy.

11. a parked car- potential energy.

12. frog sitting on a lily pad- potential energy energy.

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Answer:

A

Explanation:

Mass is a measure of the amount of matter in an object.

The mass of a substance measures the amount of matter it contains. Therefore, option A is correct.

Mass can be explained as an intrinsic property of an object. Mass can be described the amount of matter in a body. Different atoms or different particles with the same amount of matter possess nonetheless different masses.

Mass can be experimentally determined by the body's inertia, meaning the resistance to an acceleration of the body when a net force is applied. The mass evaluates the strength of the gravitational attraction to the bodies.

The S.I. base unit of measurement of mass can be represented by the kilogram (kg) but it is not the same as that of weight. Mass can be defined as generally measuring the weight utilizing a spring scale, rather than a balance scale and comparing it to already known masses.

A body on the Moon will weigh less than on Earth due to the lower gravity on the moon but still have equal mass. Paul and Karen determined that the mass of a sample was 50 g which is the amount of matter it contains.

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Answer: Negatively

Explanation:

Answer:

Negative charges

Explanation:

like magnets attract only their opposite poles, the charges behave in the same way.

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Answer: Tires air condenses and when it condenses it takes up less room.

Explanation: Hope that helps!

Among the options listed, water is the base.

A base is a substance that has a high pH and can accept protons or donate hydroxide ions (OH-) in a chemical reaction. Water fits this definition as it has a neutral pH of 7, making it neither an acid nor a base. However, water can act as a base by accepting protons from strong acids to form hydronium ions (H3O+).On the other hand, hand soap is typically formulated to be slightly acidic, around pH 5.5 to 6.5, to match the skin's natural acidity. Gastric juices, such as stomach acid, are highly acidic with a pH ranging from 1 to 3, necessary for digestion.

Orange juice is also acidic, typically having a pH range of 3 to 4.5, due to the presence of citric acid.While water can exhibit both acidic and basic properties depending on the context, it is considered neutral in its pure form with a pH of 7. It can act as a base when reacting with stronger acids. Water's ability to dissociate into hydronium and hydroxide ions makes it amphoteric, meaning it can behave as both an acid and a base.

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Among the options provided, water (H2O) is considered a base.

According to the Bronsted-Lowry hypothesis, which categorizes bases as proton acceptors and acids as proton donors, water can function as a base by taking a proton to form the hydroxide ion (OH-), which is an anion. Pure water has a limited amount of water molecules that dissociate to form H+ and OH- ions, which creates a mildly basic solution.

Therefore, In some situations, water may be regarded as a base.

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For vacancy diffusion, an atom must have sufficient activation energy to break bonds with neighboring atoms and move to an adjacent vacancy.

In solids, vacancy diffusion occurs when atoms move through crystal structures by jumping from one lattice site to another. To make such a move, an atom needs enough energy to overcome the bonding forces holding it in its current position. This energy is known as the activation energy.

By possessing sufficient activation energy, an atom can break its bonds with neighboring atoms, creating a temporary vacancy or defect in the lattice. The atom can then migrate to an adjacent lattice site or vacancy, filling the empty space.

The activation energy required for vacancy diffusion depends on the strength of the atomic bonds and the nature of the crystal structure. Higher activation energies are typically associated with stronger bonds, making diffusion less likely to occur at lower temperatures. As temperature increases, atoms acquire greater thermal energy, increasing the probability of overcoming the activation energy barrier and facilitating vacancy diffusion.

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To mix 750 mL of a 0.15 M solution of copper (II) sulfate pentahydrate, you would need to follow these steps:

Calculate the amount of copper (II) sulfate pentahydrate needed to prepare the solution. This can be done using the formula:

mass = moles x molar mass

where mass is the mass of the solute (in grams), moles is the number of moles of the solute, and molar mass is the molar mass of the solute (in g/mol).

For this solution, we have:

moles = M x V

where M is the molarity of the solution (in moles per liter) and V is the volume of the solution (in liters).

moles = 0.15 mol/L x 0.750 L = 0.1125 mol

The molar mass of copper (II) sulfate pentahydrate is 249.68 g/mol. Therefore, the mass of copper (II) sulfate pentahydrate needed to prepare the solution is:

mass = moles x molar mass = 0.1125 mol x 249.68 g/mol = 28.05 g

Using a digital scale, weigh 28.05 g of copper (II) sulfate pentahydrate and transfer it to a clean, dry 1 L volumetric flask.

Pour in 500 mL of distilled water and gently swirl to dissolve the copper (II) sulfate pentahydrate.

Once the material has been entirely dissolved, add enough distilled water to fill the flask to the mark. (1 L). This will yield a 1000 mL 0.15 M solution of copper (II) sulfate pentahydrate. (1 L).

Using a pipette, burette, or volumetric flask, gently transfer 750 mL of the solution to a clean, dry container.

If necessary, adjust the final volume of the solution by adding more distilled water or removing some of the solutions with a pipette or burette.

Mix the solution thoroughly by swirling or inverting the container several times.

Your 750 mL of 0.15 M copper (II) sulfate pentahydrate solution is now ready to use.

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Answer:

D

Explanation:

It states that D has oxygen, and is closer to the Sun.

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Answer:

I am pretty sure it is B

Explanation:

The others would either burn u like a crispy chicken nugget or freeze you like a popsicle

Holding a toast  will not help in preventing Johny from dying of hypothermia as the thermal energy produced by holding a hot toast is not sufficient to maintain the thermal energy of the body.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

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Answer:

argon is 18 2-8-8 since it has octet circle and fully stable you can say it has no electro negativity

Answer:

Explanation:

Here, we want to get the name for the given chemical formula

Looking at the formula, we look at the names of the element

The names are sodium and fluorine

We write the name of the metal element first, then the non-metal atom

Thus, we have it as

Answer:

Group 2

Explanation:

The force pulling a tree down is the same that brings a skier to the lodge:  food and beer.  No, just kidding.  Gravity.  The parachuter in Group three also has gravity as a key force, but the reverse force of the air on the parachute is a key consideration to the problem, as well as to the parachuter.  But it comes close.

Answer:

these micronutrients are not produced in our bodies and must be derived from the food we eat.

Explanation:

Vitamins and minerals are micronutrients required by the body to carry out a range of normal functions. However, these micronutrients are not produced in our bodies and must be derived from the food we eat. Vitamins are organic substances that are generally classified as either fat soluble or water soluble.

In the reactions listed, the reactants are hydrogen, oxygen, magnesium, iron, sulphur, and calcium. All living things depend on oxygen, which is the most prevalent element in the Earth's atmosphere. Magnesium is an alkaline earth element that is essential to the formation of several biological components, such as enzymes and proteins.

Haemoglobin, which transports oxygen in the blood, contains iron, which is a crucial component. Sulphur is a non-metallic element that plays a significant role in the formation of proteins and vitamins. The lightest element, hydrogen, is a crucial part of water.

Carbon dioxide, magnesium oxide, iron sulphide, sulphur dioxide, and water are the reactions' end products. A significant part of the atmosphere of the Earth is made up of the colourless and odourless gas known as carbon dioxide.

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The addition of the HCl solution to the yellow solution causes the pH to decrease, which shifts the equilibrium of methyl red towards the acidic form and results in the solution turning red.

A pH indicator called methyl red changes color across a certain pH range. When the pH is below 4.4, it is yellow and when the pH is above 6.2, it is red. The pH of the mixture is neutral when methyl red is added to distilled water which is higher than the pH range where methyl red turns red. As a result, the mixture appears yellow.

Therefore, the addition of the HCl solution to the yellow solution causes the pH to decrease, which shifts the equilibrium of methyl red towards the acidic form and results in the solution turning red.

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Answer:

A, And D

Explanation:

I did this before and i got it right ❤