If 175.6 joules of energy are applied to a sample of Aluminum and its temperature changed by 35.4 degrees then what was the weight of the Aluminum sample?

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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The base dissociation constant (Kb) determines the ions of the base dissociated into the aqueous solution. Kb for CN⁻ ion will be 2.0 × 10⁻⁵. Thus, option D is correct.

The base dissociation constant (Kb) is the measurement of the ions that a base can dissociate and dissolve in the aqueous solution. The higher the value of the base dissociation constant the higher will be its basicity and strength.

The dissociation reaction of hydrogen cyanide is shown as,

HCN → H​​​​​​⁺ + CN​​​​​⁻

Given,

Ka for HCN = 4.9 x 10⁻¹⁰

The correlation between acid dissociation constant and base dissociation constant is given as,

K​​​​​​w = K​​​​​​a × Kb

Substituting values,

Kb = K​​​​​​w ÷ Ka

= (1 × 10⁻¹⁴) ÷ (4.9 × 10⁻¹⁰)

= 2.0 × 10⁻⁵

Therefore, option D. 2.0 × 10⁻⁵ is the base dissociation constant (Kb) for cyanide ions.

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Answer: A) A theory is the best possible explanation based on all existing evidence

A law in physics and chemistry is a description of what is going on. For instance, newton's law of motion helps us find out an objects acceleration if we know its mass and the force applied. The theory of gravity on the other hand is the best guess we make as to why objects with mass are attracted to one another.

Theories change over time if new evidence is found that contradicts the old theory. Saying "a theory is more important than a law" is subjective, and I would argue that both are equally important in their own way.

The atomic theory a theory is the best possible explanation based on all existing evidence. The correct option is A.

The word theory renowned as to an untested hunch or one can say a guess with not having a supporting evidence.

A theory, has nearly the opposite implications for scientists. A theory is a well-supported explanation of an innate phenomenon that can encompass laws, hypotheses, along with facts.

Theories are developed to elaborate, predict, as well as comprehend phenomena, also to challenge and extend existing understanding within the constraints of critical boundary assumptions.

A theory does not become a scientific law as new or better evidence accumulates.

The theories are explanations, as well as laws are patterns located in large amounts of data that are frequently expressed as an equation. A theory will always be a theory in all aspect, and a law will always be a law.

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Answer:

This would be true good sir.

Explanation:

Have a wonderful day!

The original volume of the concentrated solution was 182.7 mL.

To solve this problem, we can use the formula for dilution:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

We are given that the initial concentration (C1) is 2.3 M, the final concentration (C2) is 2.1 M, and the final volume (V2) is 191.8 mL. We want to find the initial volume (V1).

Plugging in the values we know into the dilution formula, we get:

(2.3 M) V1 = (2.1 M) (191.8 mL)

Simplifying this expression, we can solve for V1:

V1 = (2.1 M) (191.8 mL) / (2.3 M)

V1 = 182.7 mL

It's important to note that the units of concentration and volume must be consistent in this formula. In this case, the concentrations are given in units of M (moles per liter), and the volumes are given in units of mL (milliliters).

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Answer:

C.

Explanation:

The other ones just don't make sense as answers to the question

Answer:

B

Explanation:

ice molecules move slowly and cluster tightly together, they produce a low amount of heat

Answer:

1. is Molar (with capital M)

2. is molal (m)

Explanation:

By definition, 1 Molar solutions have 1 mol of solute in 1 L of solution and 1 molal solutions have 1 mol of solute in 1 Kg of solvent

One mole of aluminum oxide or Al₂O₃ is 102 g/mol  . It contains 54 g of Al metal. Thus, 25.5 tones of aluminum oxide contains 13.5 tones of Al. Therefore, the maximum mass of aluminum that can be extracted is 13.5 tones.

Aluminum is 13 the element in periodic table. It is an electropositive element and exhibit metallic properties. Aluminum easily forms its oxides by reacting with atmospheric oxygen.

The molar mass of aluminum oxide Al₂O₃ is 102 g/mol. The atomic mass of Al is 27 g/mol. Thus 102 g of Al₂O₃ contains 54 g of Al. Therefore, the mass of Al in 25.5 tones or 25.5 ×10⁶ g of Al₂O₃ is calculated as follows:

mass of Al = (25.5 ×10⁶ g × 54 g) / 102 g

                  = 13.5  ×10⁶ g = 13.5 tones.

Therefore, the maximum mass of aluminum that can be extracted is 13.5 tones

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Answer:

0.025536g

Explanation:

no. of mole = mass/Mr

mass = Mr ×  no. of mole

         = [23 + 1 + 12 + 3(16)] × 3.04×10^-4

         = 0.025536g

         = 0.0255g (3 significant figures)

The molar mass of CuCl2 is 134.452 g/mol. Each element's molar mass can be found in its designated box on the periodic table.

Answer:

amino acids

Hope this helps:)

Answer:

C: Amino Acids on edge

Explanation:

Answer:

the degree of their disorderliness increases

Answer:

down below

Explanation:

The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.

The amount of work that has been done by the man would be =1,102.5Nm

To calculate the amount of work that was done by the man, the formula that should be used would be given below as follows:

Work done = Force × distance

But force = mass × acceleration

mass = 75kg

acceleration = 9.8m/s²

Force = 75×9.8 =735N

Work done = 735× 1.5 = 1,102.5Nm

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Object Action to Release Energy Energy Transformation

Flashlight Press the switch Electric Energy → Light Energy

Chocolate Consume or melt Chemical Energy → Thermal Energy

Gas Ignite or burn Chemical Energy → Thermal Energy

Dynamite Detonate Chemical Energy → Mechanical Energy + Thermal Energy + Sound Energy + Light Energy

Olympic diver Jump or dive Potential Energy (Gravitational) → Kinetic Energy (Mechanical)

on platform  

Match Strike against a rough surface Chemical Energy → Thermal Energy + Light Energy

Stretched elastic band Release one end Elastic Potential Energy → Kinetic Energy (Mechanical)

Flashlight: To release the stored energy in a flashlight, you need to press the switch. This action completes an electrical circuit, allowing the electric energy stored in the battery to flow through the bulb, transforming into light energy.

Chocolate: Consuming or melting chocolate releases its stored energy. When you eat chocolate, it undergoes a chemical reaction in your body, breaking down the complex molecules and converting the chemical energy stored in the chocolate into thermal energy, providing you with warmth.

Gas: The stored energy in gas can be released by igniting or burning it. When gas reacts with oxygen in the presence of heat or a flame, a chemical reaction occurs, converting the chemical energy stored in the gas into thermal energy and producing light and heat.

Dynamite: To release the stored energy in dynamite, it needs to be detonated. When detonated, the chemical energy stored in dynamite rapidly transforms into various forms of energy, including mechanical energy (shockwave and debris movement), thermal energy (from the explosion heat), sound energy (from the blast), and light energy (from the explosion flash).

Olympic diver on platform: The stored energy in an Olympic diver on a platform is gravitational potential energy. To release this energy, the diver needs to jump or dive off the platform, converting the potential energy into kinetic energy as they descend, eventually entering the water.

Match: To release the stored energy in a match, you need to strike it against a rough surface. This action causes a chemical reaction in the match head, converting the chemical energy stored in the match into thermal energy and light energy, resulting in a flame.

Stretched elastic band: Releasing one end of a stretched elastic band allows it to return to its original shape, converting the stored elastic potential energy into kinetic energy. As the elastic band snaps back, it moves and vibrates, exhibiting mechanical energy.

These examples demonstrate different energy transformations, including chemical energy being converted to thermal energy, electrical energy transformed into light energy, potential energy being converted to kinetic energy, and elastic potential energy being converted to mechanical energy.

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Your answer is FE, or iron!

Answer:

Hi!

So, a homogeneous mixture is when the parts that make up the mixture are all mixed in perfectly evenly, so they're only appearing as one uniform substance.

In a heterogeneous mixture, the pieces are not evenly mixed. A pizza has separate parts, like the crust and toppings, so it's a heterogeneous mixture.    

The interactions that can be explained by hydrogen bonding are:

Hydrogen bonding is a type of intermolecular force that occurs between a hydrogen atom in a polar molecule and a highly electronegative atom, such as nitrogen, oxygen, or fluorine, in a neighboring molecule. It is a relatively strong force and can significantly affect the physical and chemical properties of substances.

In the case of HF and HCl, both molecules are polar, but HF has a higher boiling point due to the stronger hydrogen bonding between its molecules. In ice, the hydrogen bonding between water molecules creates a crystal structure with a characteristic lattice arrangement.

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The concentration of the HNO₃ solution needed to neutralize the 27.60 mL of 1.00 M NaOH is 2.76 M

The balanced equtaion is given below:

HNO₃ + NaOH —> H₂O + NaNO₃

Now, we shall obtain the concentration of the HNO₃ solution needed for the neutralization reaction. This is shown below:

CaVa / CbVb = nA / nB

(Ca × 10) / (1 × 27.6) = 1

(Ca × 10) / 27.6 = 1

Cross multiply

Ca × 10 = 27.6

Divide both side by 10

Ca = 27.6 / 10

Ca = 2.76 M

Thus, the concentration of the HNO₃ solution needed is 2.76 M

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The number of moles of carbondioxide that will be produced in the combustion of methane is 3 moles (option D).

Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, methane undergoes combustion in air to produce carbondioxide and water. Methane is the limiting reactant because the other reactant is oxygen of the air which is always present in excess.

Based on the chemical equation given above, 1 mole of methane produces 1 mole of carbondioxide.

This means that 3 moles of methane will produce 3 moles of carbondioxide.

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Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

have a good day!

Answer:

1or 3

Explanation:

Answer:

Explanation:

Panther how many million vacation bigger than I think a 20 kg in the

The overall charge on the structure is negative one (-1).

The central boron atom in the structure is bonded to two hydrogen atoms. Boron has three valence electrons, and it has formed only two bonds, so it has a formal charge of +1.

Each of the hydrogen atoms has one valence electron, and each is bonded to the boron atom, so each hydrogen atom has a formal charge of -1. The sum of the formal charges in the structure is equal to the charge of the ion, which is -2. Adding up the formal charges of the atoms, we get:

B: +1

H: -1 (two times)

Overall charge = sum of formal charges = +1 - 1 - 1 = -1

Therefore, the overall charge on the structure is negative one (-1).

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A chiral catalyst controls the production of a chiral molecule in asymmetric catalysis so that the formation of a certain stereoisomer is encouraged.

The stabilization of the transition state (ensemble) remains the main challenge in enzyme catalysis. The modification of the transition state is the source of the catalytic power. However, rather than merely a single clearly defined structure, the transition state is defined by us as the full transition-state surface.

Molecule parameters like molecular geometry, heat of formation, strain energy, dipole moment, and vibrational frequencies may be calculated empirically using molecular mechanics approach.

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According to the given statement Na of the atoms listed below has the largest radius.

An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.

Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.

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A. The heviest liquid (the one with larger density) will be found at the bottom.

Answer:

Mx will be less than My.

Explanation:

The correct option is - Mx will be less than My.

Because, liquid X have been higher viscosity and vapor pressure than liquid B.

Vapor pressure of liquid A is greater, so the amount of liquid X will vaporized greater and H2 gas has been displaced greater from the beaker as compared to liquid Y.

The amount of H2 in liquid Y remains greater in beaker as compared to liquid X.

So, Mx will be less than My.