Aqua regia, a mixture of concentrated HNO₃ and HCl, was developed by alchemists as a means to "dissolve" gold. The process is a redox reaction with this simplified skeleton reaction:\mathrm{Au}(s)+\mathrm{NO}_{3}^{-}(a q)+\mathrm{Cl}^{-}(a q) \longrightarrow \mathrm{AuCl}_{4}^{-}(a q)+\mathrm{NO}_{2}(g) (a) Balance the reaction by the half-reaction method.

Answer:

refer to attachment OK sir

Answer:

As per Dalton's law of Partial pressure,

The total pressure of a mixture of gases is equal to sum of partial pressure of individual components of the mixture.

So, P=P_H+P_N+P_WP=P

H

​

+P

N

​

+P

W

​

\implies 864\ mm=220\ mm+410\ mm+P_W\implies⟹864 mm=220 mm+410 mm+P

W

​

⟹ P_W=864-630=234P

W

​

=864−630=234 mm of Hg.

Explanation:

Hope it helps<3

Answer:

d. Two moles of carbon dioxide were produced from this reaction

Explanation:

The given chemical reaction can be written as follows;

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

From the above chemical reaction, we have;

Two moles of C₂H₂ reacts with five moles of O₂ to produce four moles of CO₂ and two moles of H₂O

We have;

One mole of C₂H₂ will react with two and half moles of O₂ to produce two moles of CO₂ and one mole of H₂O

Therefore, in the above reaction, when one mole of C₂H₂ is used, two moles of CO₂ will be produced.

Answer:

number of protons in a nucleus

Explanation:

number of protons in a nucleus.  The number of protons in the nucleus is, by definition, the atomic number.

Answer:

B. in space because it is a lot more colder in space then Mt. Everst

Answer:

Na2Co3 is the formula of sodium carbonate

Verify that the number of atoms of each element is equal on both sides of the equation and, if the equation contains ions, that the charges are balanced equation.

The number and type of each atom in balanced chemical equations are the same on both sides of the equation. The simplest whole number ratio must be used as the coefficients in a balanced equation. In chemical processes, mass is always preserved.

Each element must have the same number of atoms on the left as it has on the right. You must add integers to the left of one or more equations to balance an imbalanced equation.

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Answer:

Go to the bottom-right corner of your taskbar, then click the Volume Control icon. A small window will pop up, and it will offer access to the volume level control. Slide the bar to set the volume to your preferred level. This may be one of the quickest and easiest ways to change the volume level of your computer.

Answer:

See explanation

Explanation:

Generally in English language, the term 'conservation' connotes 'protection'. It also communicates the idea of preventing something from getting lost or wasted.

In Ecology, conservation has to do with the protection and preservation of biodiversity.

In Chemistry, the term 'conservation' carries a similar meaning as we have discussed above. For instance, in chemistry, the principle of conservation of energy states that energy is neither created nor destroyed but can be transformed from one form to another. The principle tells us that energy can not be wasted or lost in a system. That is, energy is conserved!

Hence, the meaning of the term 'conservation' in chemistry is similar to its meaning in other disciplines as discussed above.

Answer

In summary

A number of properties of liquids, such as cohesion and adhesion, are influenced by the intermolecular forces within the liquid itself. Cohesion are various intermolecular forces that hold solids and liquids together while adhesion is the ability of a liquids to stick to an unlike substance. The rise or fall of a liquid in a capillary tube is governed by the balance of cohesive and adhesive forces. Lastly, surface tension is a fundamental property of the surface of liquid, it is responsible for the curvature of the surfaces of liquids dues to the polarity that exists in the liquid molecules.

Explanation

Liquids flow because the intermolecular forces between molecules are weak enough to allow the molecules to move around relative to one another. The forces are attractive when a negative charge interacts with a nearby positive charge and repulsive when the neighboring charges are the same, either both positive or both negative. Molecules are held together by polar covalent bonds – which means that the electrons are not evenly distributed between the bonded atoms. This uneven distribution in the covalent bonds of the molecules results in a partial charge.

The liquid molecules don’t interact particularly strongly with each other because the intermolecular forces are weak. The primary intermolecular forces – are London dispersion forces, which for small molecules are the weakest types of intermolecular forces. These weak forces lead to low cohesion. The molecules don’t interact strongly with each other, so they can slide right past one another.

Adhesion is the tendency of a compound to interact with another compound. (Remember that, in contrast, cohesion is the tendency of a compound to interact with itself.) Adhesion helps explain how liquids interact with their containers and with other liquids. One example of an interaction with high adhesion is that between water and glass. Both water and glass are held together by polar bonds. Therefore, the two materials can also form favorable polar interactions with each other, leading to high adhesion.

The enthalpy change for the formation step of this intermediate is 136 kJ/mol.

The enthalpy of reaction can be obtained from the enthalpies of formation of the species involved. The enthalpy of reaction is the heat evolved or absorbed in a reaction.

Thus, the enthalpy change for the formation step of this intermediate is 4 *  34 kJ/mol = 136 kJ/mol.

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Answer:

i think is probably A

Explanation:

because at constant temperature, the product of the pressure and volume of a given mass of and ideal gass in a closed system is always constant

Answer:

I believe the answer is A or D

Explanation:

I hope this helps you out!

Environmental groups may have supported cap-and-trade programs for SO2 emissions but not for NOx and heavy metals due to differences in their environmental impacts, technological feasibility, and the effectiveness of alternative regulatory approaches.

Environmental groups may have supported cap-and-trade programs for SO2 emissions due to the significant environmental and health impacts associated with SO2, such as the formation of acid rain and respiratory issues. Cap-and-trade programs provide a market-based approach to reducing emissions by setting a cap on total emissions and allowing companies to trade emission allowances. This approach incentivizes emission reductions and can effectively reduce SO2 levels.

On the other hand, cap-and-trade programs may not be as suitable for NOx and heavy metals due to several reasons. NOx emissions contribute to air pollution and can lead to smog formation and respiratory problems. However, reducing NOx emissions typically requires more complex and diverse control technologies, such as selective catalytic reduction (SCR) systems, which may not lend themselves well to the tradable permit system.

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Answer:

Carbon-14

Carbon-14: with 6 protons and 8 neutrons, and an atomic mass of 14.

Answer:

I think the answer Is 0.636 mol of CO2!

Answer:

As the car starts to slide down the ramp, it is kinetic energy and when it's on the top of the ramp,  it is potential energy. We can see that the energy is now being transferred through the car and ramp.

Answer:

2Al + 3Na2SO4 -----> Al2(SO4)3 + 6 Na

Explanation:

Product should be Al2(SO4)3

Because Al contains +3 charge

And SO4 contains -2 charge

To balance this postive and negative charge we multiple +3 with 2 and -2 with 3

Answer:

There are 63.546 grams in a 2.50 moles of copper.

Answer: A The Triangle Fire was a tragedy that could have been prevented.

Explanation:

The Triangle Fire was a tragedy that happened in the factory of Shirtwaist Company in New York City where there was.a.fore outbreak and about 145 employees of the company were killed.

The deaths could have been prevented because the company neglected safety measures such as having a good and reliable pump system, having readily available fire extinguishers. Also, what resulted in the lethal nature of the incident was because the doors within the building of the factory were locked.

The tragedy generated lots of attention and series of laws were been out in place in order to ensure that workers are safe at their workplace.

Gold is found in various ionic compounds, but one of the most well-known and commercially significant compounds is gold chloride, also known as auric chloride or gold(III) chloride.

The chemical formula for gold chloride is AuCl₃. Gold chloride is an ionic compound composed of gold cations (Au³⁺) and chloride anions (Cl-). It is a yellow-orange solid that is highly soluble in water. Gold chloride can be formed by reacting the gold metal with chlorine gas or by dissolving the gold metal in aqua regia, which is a mixture of concentrated nitric acid and hydrochloric acid.

Gold chloride has several uses and applications. It is commonly used in the field of nanotechnology for the synthesis of gold nanoparticles. These nanoparticles have unique optical, electronic, and catalytic properties, making them valuable in various fields such as medicine, electronics, and materials science.

In addition to gold chloride, gold can also form other ionic compounds with different anions, such as gold bromide (AuBr), gold iodide (AuI), gold sulfide (Au2S), and gold cyanide (AuCN). These compounds have their own unique properties and applications.

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Molar mass of H_2SO_4

\(\\ \rm\hookrightarrow Mass=No\:of\:moles\times Molar\:mass\)

\(\\ \rm\hookrightarrow Mass=0.5(98)\)

\(\\ \rm\hookrightarrow Mass=49g\)

The correct answer to the given question is option c) Metals.

What were the materials used during the 1960s?

The materials used during the 1960s included metals, ceramics, glasses, semiconductors, polymers, and elastomers.

The 1960s were a period of significant technological advances.

A number of new and innovative materials emerged during this time that would shape the world for decades to com. Metals were the second most used material during the 1960s. During this time, there was significant demand for materials that could withstand high temperatures and pressures, as well as resist wear and tear and corrosion .Metals were used for a wide range of applications, including the construction of aircraft, automobiles, and other machinery.

They were also used in the production of electronic components, such as resistors and capacitors, and for the manufacture of a wide range of consumer goods, from kitchen utensils to jewellery. Metals remain a critical material in today's world, with a wide range of applications in industries ranging from aerospace and automotive to electronics and construction.

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Answer:

D

Explanation:

Process of elimination. There is more than just water vapor in a vape so it can't be D, it isn't a cigarette so it can't be B, and A is just clearly not the answer haha.

Answer:

Pure substance is which it consists only one type of Atom , molecule , or compound....

Explanation:

HOPE IT HELP MARK AS BRAINLIST

The mass (in grams) of oxygen, O₂ required to produce 61.3 grams of carbon dioxide, CO₂ is 44.6 grams

First, we shall write the balanced equation. This is shown below:

C + O₂ -> CO₂

From the balanced equation above,

44 g of CO₂ were obtained from 32 g of O₂

Finally, we shall obtain the mass of oxygen, O₂ needed to produced 61.3 g of carbon dioxide, CO₂. Details below:

From the balanced equation above,

44 g of CO₂ were obtained from 32 g of O₂

Therefore,

61.3 g of CO₂ will be obtain from = (61.3 × 32) / 44 = 44.6 g of O₂

Thus, we can conclude that the mass of oxygen needed to produced 61.3 g of carbon dioxide is 44.6 g

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Answer:

The volume of solution in liters required to make a 0.250 M solution from 3.52 moles of solute is 14.08 liters of solution

Explanation:

The question relates to the definition of the concentration of a solution which is the number of moles per liter (1 liter = 1 dm³) of solution

Therefore we have;

The concentration of the intended solution = 0.250 M

Therefore, the number of moles per liter of the required resolution = 0.250 moles

Therefore, the concentration of the required solution = 0.250 moles/liter

The volume in liters of the required solution that will have 3.52 moles of the solute is given as follows;

The required volume of solution = The number of moles of the solute/(The concentration of the solution)

∴ The required volume of solution = 3.52 moles/(0.250 moles/liter) = 14.08 liters

The required volume of solution to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.

Therefore the number of liters required to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.