a 15g sample of copper is heated to 100C and transformed to 100g of H20 at 25C what is the specific heat o fcopper

Answer:

214

Explanation:

Q=mco

Q=heat

M is mass

C is specific heat

O is increased in temperature

There are numerous types of water. It is a solid at very low temperatures (below 0°C). When temperatures are "normal" (between 0°C and 100°C),

it's a liquid), it is. Water becomes a gas at temperatures higher than 100 °C. (steam). The temperature affects the state that the water is in. Each of the three states—solid, liquid, and gas—has a distinct set of physical characteristics. Solid, liquid, or gas are the three basic states of matter. Physical properties also include the state that a specific substance manifests. At ambient temperature, some substances, like oxygen and carbon dioxide, exist as gases, while others, like water and mercury metal, do so as liquids. The majority of metals are solids at normal temperature.

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The arrangement of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.

One orbital can house a maximum of two electrons, and there are four different types of orbitals (s, p, d, and f). More electrons can be held in the p, d, and f orbitals since they contain various sublevels. Each element's position on the periodic table determines the specific electron configuration of that element. The arrangement of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.

A standardized notation is used for expressing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons in the orbital, which is expressed in superscript. For instance, carbon's (atomic number: 6) electronic configuration is 1s22s22p2.

Hence. The elements are denoted by the  electron configurations are,

1) Beryllium

2) Boron

3) Magnesium

4) Silicon

5) Phosphorus

6) Calcium

7) Nickel

8) Krypton

9) Bromine

10) Strontium

The complete question is,

Determine the elements denoted by the following electron configurations.​

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Answer:

thermal and light energy

Answer:

Polybutene exists in two isomeric forms depending on where the carbon double bond is positioned in the monomer molecule. If it is between the first and second carbon atoms in a linear molecule, then the chemically accurate name of the resulting polymer is polybutene-1.

Answer:

520mL

Explanation:

Data obtained from the question include:

Molarity of stock solution (M1) = 12M

Volume of stock solution (V1) = 130mL

Molarity of diluted solution (M2) = 3M

Volume of diluted (V2) =..?

The volume of the diluted solution can be obtained as follow:

M1V1 = M2V2

12 x 130 = 3 x V2

Divide both side by 3

V2 = 12 x 130 / 3

V2 = 520mL.

Therefore, 520mL of the diluted solution can be prepared.

The radioactive isotope Technium-99 decays most likely through alpha decay (99tc). An atomic nucleus emits an alpha particle during the radioactive decay process known as "alpha decay".

and then changes or "decays" into a separate atomic nucleus with a mass number that is decreased by four and an atomic number that is decreased by two. The nucleus of an atom of helium-4 is the same as an alpha particle. Radioisotopes are an element's radioactive isotopes. They are the atoms with unstable neutron-proton combinations or excess energy in their nuclei. During those processes, the radionuclide is said to experience radioactive decay, albeit the surplus energy may be put to use in any number of ways.

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The characteristics and the type of molecular bond they describe:

1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond

2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond

3. Bonds inside the water molecule (between the H and O): Covalent bond

4. Bonds that exist between two water molecules: Hydrogen bond

5. Strongest bond type: Covalent bond

6. Weakest bond type: Van der Waals bond

7. Bonds that are used by water to dissolve salt: Ionic bond

The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.

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H₂O(g) is the most stable compound of all the given compounds.

The concept of enthalpy pertains to the heat content of a given system under constant pressure, and is denoted by the letter "H". It is a fundamental thermodynamic property that can be expressed as the sum of a system's internal energy and the product obtained by multiplying its pressure with volume. In simpler terms, enthalpy provides insight into how much heat energy is present within a system at any given point in time.

Out of the options provided, H₂O(g) or water vapor is the most stable compound in terms of enthalpy rate. The reason being, water has a negative enthalpy of formation which implies that energy is released when it is formed from its constituent elements - hydrogen and oxygen. This negative enthalpy value signifies that water is thermodynamically stable at standard conditions.

While N₂ also has a negative enthalpy of formation, it is comparatively less negative than that of water, which means it is less stable than water. On the other hand, both NH₃ and C(g) have positive enthalpies of formation indicating they are less stable than their constituent elements and require energy for their formation. Therefore, based on these factors, H₂O(g) emerges as the most stable compound among all the given options.

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Enzymes speed up chemical reactions by lowering the activation energy needed for the reaction. The correct option is d.

Enzymes are biological molecules, typically proteins, that act as catalysts for chemical reactions. Catalysts are substances that can speed up a chemical reaction without being consumed in the process.

Enzymes work by lowering the activation energy needed for a chemical reaction to occur. Activation energy is the energy required to break the bonds of the reactants and initiate the chemical reaction. By lowering the activation energy, enzymes make it easier for reactants to come together and form products.

Enzymes achieve this by binding to the reactants, or substrates, and bringing them into close proximity to each other. This allows the substrates to interact more easily and lowers the energy barrier for the reaction to occur. Enzymes also stabilize the transition state of the reaction, further reducing the activation energy needed for the reaction to proceed.

Therefore, the correct answer is d) they lower the activation energy needed for the reaction.

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Answer:

A

Explanation:

it releases 4

334 J/g of heat energy

hope its correct

The correct simplified equation for cellular respiration is glucose + oxygen → carbon dioxide + water . i.e. option A

Cellular respiration is defined as the process by which cells convert glucose and oxygen into energy in the form of ATP (adenosine triphosphate). It is a metabolic process that occurs in the mitochondria of eukaryotic cells and in the cytoplasm of prokaryotic cells.

Cellular respiration can be divided into three main stages viz. glycolysis, kreb's cycle and electron transport chain. These are discussed below:

Glycolysis: The first stage of cellular respiration is glycolysis, which takes place in the cytoplasm. In glycolysis, glucose is broken down into two molecules of pyruvate, and a small amount of ATP is produced.

Kreb's cycle: The second stage of cellular respiration is the Krebs cycle, which takes place in the mitochondria. In the Krebs cycle, pyruvate is broken down into carbon dioxide, and more ATP is produced.

Electron transport chain: The final stage of cellular respiration is the electron transport chain, which also takes place in the mitochondria. In the electron transport chain, electrons from the Krebs cycle are used to produce a large amount of ATP.

Thus, it is estimated that cellular respiration produces a net gain of 36-38 ATP molecules per molecule of glucose. The process of cellular respiration is essential for providing cells with the energy they need to carry out their functions and is an important part of the metabolism of all living organisms.

Therefore, the statement that represents a simplified equation for cellular respiration is option A.

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Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.

Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.

Answer:

Demonstration 1 showed a chemical change because a new gaseous substance was formed, and demonstration 2 showed a physical change because liquid water became water vapor.

Explanation:

Chemical changes alter the chemical makeup of a subject, and a physical change only alters the appearance of a subject, not the chemical makeup.

The question is about the systematic evaluation of materials for post-combustion CO2 capture in a temperature swing adsorption process.

In a temperature swing adsorption process for post-combustion CO2 capture, materials are evaluated systematically to determine their effectiveness in capturing CO2. Here is a step-by-step explanation of the process:

1. Material selection: Various materials, such as zeolites, activated carbon, metal-organic frameworks (MOFs), and amine-based sorbents, are considered for CO2 capture. Each material has different properties and adsorption capacities.

2. Screening: The selected materials are screened based on specific criteria, such as CO2 adsorption capacity, selectivity, stability, and cost. This helps narrow down the choices to the most promising candidates.

3. Bench-scale testing: The selected materials undergo bench-scale testing to evaluate their performance under controlled conditions. This involves measuring the CO2 adsorption capacity, kinetics, and regeneration efficiency of each material.

4. Process modeling: Computer simulations are used to model the temperature swing adsorption process with different materials. This helps predict the overall performance of the system, including CO2 capture efficiency, energy requirements, and process optimization.

5. Pilot-scale testing: The most promising materials are then tested at a larger scale in a pilot plant. This helps validate their performance and assess any challenges or limitations that may arise during practical implementation.

6. Techno-economic analysis: The performance data obtained from the pilot-scale testing is used to conduct a techno-economic analysis. This involves evaluating the cost-effectiveness of the materials, including their initial investment, operating costs, and potential for scaling up.

7. Material optimization: Based on the results of the evaluations and analysis, further modifications or improvements can be made to the materials to enhance their performance, stability, or cost-effectiveness.

By following this systematic evaluation process, researchers and engineers can identify the most suitable materials for post-combustion CO2 capture in a temperature swing adsorption process.

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The empirical formula of zinc chloride is ZnCl2.

To determine the empirical formula of zinc chloride, we need to have information on the masses of both the zinc and chlorine in the compound. We can start by using the given information to calculate the number of moles of EDTA that reacted with the zinc ions in the solution:

moles of EDTA = (volume of EDTA solution) x (molarity of EDTA)

moles of EDTA = 0.03667 L x 0.300 mol/L

moles of EDTA = 0.011001 mol

Since EDTA reacts with the zinc ions in a 1:1 molar ratio, the number of moles of zinc ions in the solution is also 0.011001 mol.

Next, we can use the mass of chloride ions present in the solution to calculate the mass of chlorine:

mass of chloride = 1.170 g

moles of chloride = mass of chloride / molar mass of chloride

moles of chloride = 1.170 g / 35.45 g/mol

moles of chloride = 0.0330 mol

Since zinc chloride has a 1:2 ratio of zinc to chlorine atoms, we can use the number of moles of zinc to calculate the number of moles of chlorine:

moles of chlorine = 2 x moles of zinc = 0.022002 mol

Finally, we can use the number of moles of zinc and chlorine to determine the empirical formula of zinc chloride:

empirical formula = ZnCl2

Therefore, the empirical formula of zinc chloride is ZnCl2.

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The zinc chloride solution has been titrated using EDTA and based on the quantity of EDTA used and the given mass of chloride, the empirical formula of the zinc chloride solution is determined to be ZnCl3.

In a titration, the quantity of titrant (EDTA) which is exactly needed to react with a given amount of analyte (zinc chloride) is measured. Here, 36.67 mL of 0.300 M EDTA has been used, which reacts with the zinc and the chloride ions separately. Since EDTA is a hexadentate (forming 6 bonds) ligand, it can bind to both Zinc ions (forming ZnEDTA complex) and Chloride ions. However, EDTA commonly forms a 1:1 complex with metal ions, thereby reacting with 1 mole of zinc ions.

To find the empirical formula, we need the ratio of moles of zinc to chloride in the compound. Here, given that the mass of chloride is 1.170 g, we first convert this to moles (1.170/35.5 = 0.033 moles, where 35.5 is the molar mass of chloride). The moles of EDTA are calculated by multiplying the volume (in Litres) by the molarity (moles per litre) i.e., 36.67 mL × 0.300 M = 0.011 moles. Since in this case, the number of moles of Zinc ions is equal to the number of moles of EDTA (1:1 complex), the molar ratio of Zinc to Chloride in Zinc Chloride is 0.011: 0.033 or approximately 1:3. Therefore, the empirical formula is ZnCl₃.

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Answer:

as a tracer

estimate the specimen age

Answer:

the longest-lived radioactive isotope of carbon, whose decay allows the accurate dating of archaeological artifacts. ... In carbon-14 dating, measurements of the amount of carbon-14 present in an archaeological specimen, such as a tree, are used to estimate the specimen's age.

Explanation:

What is common about the forces B and C is that both have short range.. Option A

We know that the fundamental forces are known to be the forces that are able to operate in the universe. These are the four forces that are able to hold the universe in place as we can see the universe today.

The arrangement of these four fundamental forces  in the increasing order of their relative strength is;

Having looked at these forces it is clear that the order of the increase of the strengths of the forces is from top to the bottom of the list a shown above here.

Thus the B and C talk about the weak and the strong nuclear forces and these are both short range forces as we know above.

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Different metals create particular colored flames during in the flame test since each metal has a different arrangement of electrons, which produces specific colors of light when heated. Since the visible flame color is only of the metal alone, the metal may be recognized.

The precise sizes of the potential energy jumps differ from metal to metal.As a result, the flame color of each metal will differ due to its unique spectral line pattern.The movement of a electrons inside the metal ions contained in the compounds results in the hues of the flame.

Because the energy levels of the electrons travelling around the nucleus fluctuate depending on the element, different compounds react to fire to produce distinct colored flames.

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No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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Answer:

The answer is B.  A river is a body of water, therefore, there will always be some water running over the rock.

Answer:

The answer is: B

Explanation:

The reason for this is because when a rock is underwater (the river, in this case), the water runs across it non-stop until the rock is removed from the water. The only way it can be polished if it is submerged under the water for quite some time (years and years).

I hope this helped! :))

A nitrogen atom in N2O3 has an oxidation number of +3.

The unknown nitrogen oxidation number can be given a variable (x) to ascertain its oxidation number. Since oxygen has an oxidation number of - 2 and there are three oxygen particles in N₂O₃, the complete negative charge from oxygen is (- 2) × 3 = - 6.

The total charge of a compound is equal to the sum of its oxidation numbers. Since the compound in question is neutral, the sum of the oxidation numbers must be zero in this instance.

2(N) + 3(O) = 0

2x + (-6) = 0

2x = 6

x = 3

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A simple word equation that illustrates this concept in an ionic compound is:

Total Positive Charge = Total Negative Charge

When an ionic compound forms, it is formed between positively charged cations and negatively charged anions. The total positive charge of the cations must equal the total negative charge of the anions. This is because in ionic compounds, the oppositely charged ions are held together by electrostatic forces due to the attraction between the positive and negative charges.

In other words, the total positive charge and total negative charge in an ionic compound must be balanced or neutral. This is also known as the law of conservation of charge.

A simple word equation that illustrates this concept is:

Total Positive Charge = Total Negative Charge

This means that if an ionic compound contains one cation with a charge of +1 and one anion with a charge of -1, the total positive charge will be +1 and the total negative charge will be -1. These charges cancel out each other to make the compound neutral. Similarly, if an ionic compound contains two cations with a charge of +2 and three anions with a charge of -1, the total positive charge will be +4 (2 x +2) and the total negative charge will be -3 (3 x -1). Again, these charges cancel out each other to make the compound neutral.

In summary, the total positive charge and total negative charge in an ionic compound must be balanced to maintain neutrality.

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Answer: 21.13 L of \(H_2O\) will be produced from the reaction of 24.65 L of oxygen

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number \(6.023\times 10^{23}\) of particles.

\(2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)\)  

According to stoichiometry :

7 moles of \(O_2\) give = 6 moles of \(H_2O\) vapour  

\(7\times 22.4L=156.8L\)  of \(O_2\) produce = \(6\times 22.4L=134.4L\) of \(H_2O\) vapour  

Thus 24.65 L of \(O_2\) produce = \(\frac{134.4}{156.8}\times 24.65=21.13\) L of \(H_2O\) vapour  

21.13 L of \(H_2O\) will be produced from the reaction of 24.65 L of oxygen

Answer:

21.13

Explanation:

A block that has a mass of 24 grams is 3 cm high, 4 cm long, and 7 cm wide. Therefore, the density is 0.28g/cm³.

Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram every cubic centimetre, but Earth has a density of 5.51 grams every cubic centimetre.

Density is sometimes measured in kilos every cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilograms for every cubic metre. Textbooks and handbooks list the densities of various solids, liquids, including gases.

density= mass /volume

mass = 24 grams

volume= 3×4×7=84cm³

density= 24 /84=0.28g/cm³

Therefore, the density is 0.28g/cm³.

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Approximately 30% of solar radiation is used to power the water cycle. This energy is essential for evaporation, condensation, and precipitation, which are all important processes in the water cycle.

Solar radiation provides the heat energy that drives evaporation, which is the process that turns liquid water into water vapor. This water vapor is then condensed and forms clouds, which eventually precipitate as rain or snow. Without the energy from the sun, the water cycle could not take place.

The other 70% of solar radiation is used to heat the land and the ocean, which acts like a giant heat storage system. This heat energy is then released back into the atmosphere, where it can be used to evaporate the water.

The water vapor then rises, cools and condenses, and eventually falls as precipitation. This is how the water cycle is powered and kept in balance. Without the energy from the sun, the water cycle would not be able to take place.

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The combined mass of the two reactions that have taken place is 145.33 g.

The combined mass of the contents of the flasks after the reaction has taken place is 114.87 g.

The percent deviation is 20.9 % and is not zero because some products escaped as gas.

The law of conservation of mass states that matter cannot be created nor destroyed.

This means that for a given chemical reaction, the total mass of the reactants will equal the total mass of the products.

The masses in the reaction are:

Mass of empty Erlenmeyer Flask (g) 30.46 g

Mass of the combined reactants =  (175.79 - 30.46) g

Mass of the combined reactants = 145.33 g

Mass of the contents of the flask after the reaction has taken place = 145.33 - 30.46) g

mass of the contents after the reaction = 114.87 g

Percent deviation = (145.33  - 114.87) / 145.33 * 100%

Percent deviation = 20.9 %

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Answer:

5.00 L.

Explanation:

What is given?

Volume 1 (V1) = 4.37 L.

Temperature 1 (T1) = 37.12 °C + 273 = 310.12 K.

Temperature 2(T2) = 81.93 !°C + 273 = 354.93 K.

What do we need? Volume 2 (V2).

Step-by-step solution:

This is a Charles's Law problem. Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale.

The formula that we're going to use based on this law is:

Where V is volume and T is temperature.

We want to find volume 2 (V2), so let's solve for 'V2' and replace the given data that we have in the new formula, like this:

The new volume is 5.00 L.