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When mercury oxide HgO is heated, it decomposes into mercury Hg and oxygen O2.


1) if 28.4 g of HgO decomposes and produces 2.0 g of oxygen, how many grams of Hg are produced?

____________________g


Use the correct sigfigs (subtraction)


2) What is the percent by mass of Hg in HgO?

___________________%


Use correct sigfigs (division)

Answer:

According to the numbers 1-5;Aluminium,Mercury,Oxygen,Stainless Steel,Hydrogen gas.

Explanation:

Answer: C

Explanation:

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Basic Oxygen Furnace Steelmaking is known as the dominant steelmaking technology, producing approximately 67% of the world's total output of crude steel.

More than half of the steel used in the world is produced using the basic oxygen process (BOP), which utilizes pure oxygen to turn a charge of liquid blast-furnace iron and scrap into steel.

In order to supersonically blow oxygen onto the charge, a vertically movable, water-cooled lance is inserted into the basic oxygen furnace (BOF), which is a tiltable converter lined with refractory (see figure).

Because the elements present in blast-furnace iron quickly oxidize when pure oxygen is used at high flow rates, only about 20 minutes are required for each heat, or to refine one charge.

Check the diagram below to see labels of an basic oxygen furnace ↓↓↓

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Answer:

24.07

Explanation:

The experiment described involves the decomposition of mercuric oxide (HgO) when heated. This process results in the formation of free mercury metal (Hg) and the release of oxygen gas (O₂). In this particular case, a 7.688 g sample of mercuric oxide is decomposed, producing 7.120 g of mercury. And upon heating, the resulting products are 7.120 g of mercury and 0.568 g of oxygen gas.

This type of reaction is called a decomposition reaction, which is a type of chemical reaction where a single compound breaks down into two or more simpler substances. In this case, the compound mercuric oxide (HgO) decomposes into mercury metal (Hg) and oxygen gas (O₂) when heated.

To further understand the experiment, it is essential to know the balanced chemical equation for this decomposition reaction. The equation is as follows:

2 HgO(s) → 2 Hg(l) + O₂(g)

This equation shows that for every two moles of mercuric oxide that decompose, two moles of mercury are formed, and one mole of oxygen gas is released.

From the data provided, we can calculate the amount of oxygen gas produced during the reaction. We know that the initial mass of mercuric oxide is 7.688 g, and the mass of mercury formed is 7.120 g. The difference between these two values represents the mass of oxygen gas produced:

7.688 g (HgO) - 7.120 g (Hg) = 0.568 g (O₂)

In conclusion, the experiment demonstrates the decomposition of mercuric oxide (HgO) into mercury metal (Hg) and oxygen gas (O₂) upon heating. The resulting products are 7.120 g of mercury and 0.568 g of oxygen gas.

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The total pressure of the gas mixture is 903.2 mmHg.

To calculate the total pressure of the gas mixture, we need to convert the given pressures to a common unit. Since we want the total pressure in millimeters of mercury (mmHg), we need to convert the pressures of argon, helium, and nitrogen to mmHg.

1 atm = 760 mmHg

1 torr = 1 mmHg

Given:

Argon gas pressure = 0.32 atm

Helium gas pressure = 310 mmHg

Nitrogen gas pressure = 350 torr

Converting argon pressure:

0.32 atm * 760 mmHg/atm = 243.2 mmHg

Converting nitrogen pressure:

350 torr = 350 mmHg (since 1 torr = 1 mmHg)

Now we have:

Argon gas pressure = 243.2 mmHg

Helium gas pressure = 310 mmHg

Nitrogen gas pressure = 350 mmHg

To find the total pressure, we sum up these pressures:

Total pressure = Argon + Helium + Nitrogen

Total pressure = 243.2 mmHg + 310 mmHg + 350 mmHg

Total pressure = 903.2 mmHg

Therefore, the total pressure of the gas mixture is 903.2 mmHg.

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Full Question: What is the total pressure, in millimeters of mercury, of a gas mixture containing argon gas at 0.32 atm, helium gas at 310 mmHg, and nitrogen gas at 350 torr?

The total heat required to change 32.5 grams of liquid water into steam, from room temperature (25°C) to 115°C, is 79,604 J or 79.6 kJ.

To calculate the heat required to change 32.5 grams of liquid water into steam, from room temperature (25°C) to 115°C, we need to consider the different phase changes involved.

First, we need to calculate the heat required to raise the temperature of the liquid water from 25°C to 100°C. We can use the formula Q = mcΔT, where m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature. The specific heat capacity of water is 4.18 J/(g·°C).

Q = (32.5 g) × (4.18 J/g·°C) × (100°C - 25°C) = 5,585 J

Next, we need to calculate the heat required to change the liquid water into steam at 100°C. We can use the formula Q = mΔH, where ΔH is the enthalpy of vaporization of water, which is given as 2259 J/g.

Q = (32.5 g) × (2259 J/g) = 73,267.5 J

Finally, we need to calculate the heat required to raise the temperature of the steam from 100°C to 115°C. We can use the same formula as before, Q = mcΔT, but now c is the specific heat capacity of steam, which is 1.84 J/(g·°C).

Q = (32.5 g) × (1.84 J/g·°C) × (115°C - 100°C) = 751.5 J

Therefore, the total heat required to change 32.5 grams of liquid water into steam, from room temperature (25°C) to 115°C, is 79,604 J or 79.6 kJ.

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Answer:

a soft, spongy material that may be changed into coal

Explanation:

Answer:

Explanation:

m-mass of substance

s- specific heat capacity

dt- change in temperature.

So equating,  mgh=ms(dt),  we get  (dt)=gh/s.

Answer:

36.02g bbbbbbbbbbb hbbnjkkkj

Answer:

36.02g

Explanation:

Hope this helps!

Answer:

2.43 grams are needed

Explanation:

I did the test

Hope this helps :)

Answer:

\(\huge\boxed{\sf 14}\)

Explanation:

Atomic number = 13

Mass number = 27

= Mass number - Atomic number

= 27 - 13

\(\rule[225]{225}{2}\)

The response to the question is that the polymer's molar mass is (7.99 × 10^-3 g/torr-L)

Avogadro's quantity (6.022 x 1023) of atoms or formula units make up one mole of a substance. The volume of mole of a substance of a chemical is indicated by its molar mass.

The Van 't Hoff method may be used to get the polymer's molarity from its osmotic pressure: = iRT/V.

where P is the gas constant, I the van 't Hock factor (number of nanoparticles per molecule), R the osmotic, T the temp in Kelvin, and V the volume a mole of solute occupies.

By rewriting the equation and inserting therefore first, one may get the molar mass (M):

Substituting the given values:

M = (i)(0.0821 Latm/molK)(303 K)/(26.9 torr)(0.251 L) =

7.99 × 10^-3 g/torr-L

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Answer: c

Explanation: built different

For this reaction, the appropriate equilibrium relation is x = (Kc)1/4.

Write the reaction's equilibrium constant expression. To find x, substitute the final concentrations and the known K value. Determine each substance's final concentration in the reaction mixture. By adding these values to the expression for the equilibrium constant to get K, you may verify your answers.

Nickel tetracarbonyl, Ni(CO)4, decomposes in an equilibrium reaction that is:

Ni(CO)4(g) ⇌ Ni(s) + 4CO(g)

which is given by the expression:

Kc = [Ni(s)] [CO]4 / [Ni(CO)4(g)]

The initial concentration of nickel tetracarbonyl gas is also given as 1.0 M.

Let x be the equilibrium concentration of CO gas, then the equilibrium expression can be written as:

Kc = (1) (x)4 / (1.0)

Simplifying the expression gives:

Kc = x4

Taking the fourth root of both sides gives the equilibrium relation:

x = (Kc)1/4

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Answer:

The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent. To find the amount of remaining excess reactant, subtract the mass of excess reagent consumed from the total mass of excess reagent given.

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The duration of the ATP-PC system is 0-20 seconds, and the pathway utilized during the ATP-PC system is Anaerobic.

The ATP-PC system or phosphagen system is a metabolic pathway that offers energy to the cells for quick and explosive exercises. The ATP-PC system is the quickest way to produce ATP but is also the most limited. It has a duration of 0-20 seconds.

ATP-PC SystemThe ATP-PC system is utilized for activities that require high bursts of energy and quick contractions, such as sprinting, weightlifting, or jumping. This system is anaerobic, meaning it doesn't require oxygen. Creatine phosphate and adenosine triphosphate are stored in the muscle cells and can be converted into ATP when needed. These stored energy sources are rapidly utilized during the ATP-PC system, and ATP is produced from PC (phosphocreatine) breakdown.

ATP-PC system is a non-aerobic (anaerobic) metabolic pathway where PCr (phosphocreatine) is broken down to produce ATP and creatine. This pathway utilizes the muscles' stores of ATP and PCr and can provide energy to muscles for quick, explosive movements. It is not utilized during extended activities that require a low to moderate amount of energy.

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Answer:

Explanation:

Here, we want to get the number of moles in the given number of molecules of Au

Mathematically:

1 mole of a substance has 6.02 * 10^23 molecules

The number of moles in 5.82 * 10^25 molecules would be the division as follows:

Approximately, there are 97 moles in the given number of molecules

This outcome is conceivable. Since Cr has a lower reactivity than K, it cannot remove K from its complex.

Condensation reactions (and their opposite, cleavage reactions), exchange reactions, acid-base interactions, and oxidation-reduction processes are the five categories into which the majority of chemical reactions can be divided.

The five main categories into which the bulk of chemical reactions can be grouped are acid-base reactions, exchange reactions, condensation reactions (and its opposite, cleavage reactions), and oxidation-reduction reactions.

The classification strategy is purely for convenience; a reaction may be classified in a number of ways depending on which of its characteristics is most important. Condensation processes are covered in this section.

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Answer:

C

Explanation:

Li + ZnCO3 -->

Answer:

Sorry I can't

Explanation:

The salt obtained from the combination of the weak acid hydrogen peroxide, H₂O₂, and the weak base ammonia, NH₃, is ammonium hydroxide, NH₄OH.Thus, there is no enough information.

Ammonium hydroxide is a weak base. When dissolved in water, it dissociates partially into NH₄⁺ ions and OH⁻ions. The NH₄⁺ ions are acidic, while the OH- ions are basic. The overall pH of the solution will depend on the relative concentrations of the NH₄⁺ and OH- ions.

If the concentration of the NH₄⁺ ions is greater than the concentration of the OH- ions, the solution will be acidic. If the concentration of the OH- ions is greater than the concentration of the NH₄⁺ ions, the solution will be basic. If the concentrations of the NH₄⁺ and OH- ions are equal, the solution will be neutral.

Without knowing the specific concentrations of the NH₄⁺ and OH- ions, it is impossible to say definitively whether the solution is acidic, basic, or neutral.

So the answer is there is not enough information.

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Answer:

The answer I would go with is A formation of a new substance.

Explanation:

This is because physical change includes changes of state. Some could be changing from a liquid to gas or solid to gas. B is not even an answer that should be considered because it doesn't fit into the category. C and D represents some of the examples of the process of physical change. Like boiling, bubbling, melting, or freezing. So the best would be A.

the number of grams of oxygen that are produced from the decomposition of 100g of kclo3 is 39.14 grams.

The balanced chemical equation for the decomposition of potassium chlorate (KClO3) is:

2KClO3(s) -> 2KCl(s) + 3O2(g)

According to this equation, 2 moles of KClO3 will produce 3 moles of O2.

The molar mass of KClO3 is approximately 122.55 g/mol, so 100 g of KClO3 is equivalent to 100/122.55 = 0.815 moles of KClO3.

Using the mole ratio from the balanced equation, we can calculate the number of moles of O2 produced:

0.815 moles KClO3 x (3 moles O2 / 2 moles KClO3) = 1.223 moles O2

Finally, we can calculate the mass of O2 produced using its molar mass, which is approximately 32 g/mol:

1.223 moles O2 x 32 g/mol = 39.14 g of O2

Therefore, approximately 39.14 grams of oxygen can be produced from the decomposition of 100 g of KClO3.

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Answer:

Explanation:

Symmetry can help resolve many chemistry problems and usually the first step is to determine the symmetry. If we know how to determine the symmetry of small molecules, we can determine symmetry of other targets which we are interested in. Therefore, this module will introduce basic concepts of group theory and after reading this module, you will know how to determine the symmetries of small molecules.

Introduction

Symmetry is very important in chemistry researches and group theory is the tool that is used to determine symmetry. Usually, it is not only the symmetry of molecule but also the symmetries of some local atoms, molecular orbitals, rotations and vibrations of bonds, etc. that are important. For example, if the symmetries of molecular orbital wave functions are known, we can find out information about the binding. Also, by the selection rules that are associated with symmetries, we can explain whether the transition is forbidden or not and also we can predict and interpret the bands we can observe in Infrared or Raman spectrum.

Symmetry operations and symmetry elements are two basic and important concepts in group theory. When we perform an operation to a molecule, if we cannot tell any difference before and after we do the operation, we call this operation a symmetry operation. This means that the molecule seems unchanged before and after a symmetry operation. As Cotton defines it in his book, when we do a symmetry operation to a molecule, every points of the molecule will be in an equivalent position.

Symmetry Elements

For different molecules, there are different kinds of symmetry operations we can perform. To finish a symmetry operation, we may rotate a molecule on a line as an axis, reflect it on a mirror plane, or invert it through a point located in the center. These lines, planes, or points are called symmetry elements. There may be more then one symmetry operations associated with a particular symmetry

Identity E

The molecule does not move and all atoms of the molecule stay at the same place when we apply an identity operation, E, on it. All molecules have the identity operation. Identity operation can also be a combination of different operations when the molecule returns to its original position after these operations are performed.1 This will be demonstrated later.

The Lewis structure of AsO showing 2 lone pairs is as follows:

O

As

/

X X (where X represents a lone pair)

The molecular geometry of AsO is trigonal planar. The central As atom is hybridized with sp2 hybridization. The approximate bond angles in AsO are 120 degrees. The AsO ion is polar.

A Lewis structure, also known as a Lewis dot diagram, is a way to represent the chemical bonding in a molecule. It uses dots (also called electron dots or Lewis dots) to show the valence electrons on an atom, and lines to show the bonds between atoms. The goal of drawing a Lewis structure is to use the valence electrons of the atoms in a molecule to form the most stable arrangement of atoms, that is to say, to achieve the octet rule where each atom has 8 valence electrons in its outermost shell.

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Answer:

A: 33S

Explanation:

An atom has 16 protons & 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.

Answer:

the answer is A

Explanation:

i just took quiz and got 100%

Answer:

Ca2+ represents an ion with 20 protons and 18 electrons.

Explanation:

A calcium atom has 20 protons and 20 electrons. The 2+ charge next to the symbol indicates a loss of two electrons: 20-2=18.

A buffer is a solution that can resist a change in pH when a small amount of acid or base is added to it. Buffer solutions can resist pH changes because they contain a weak acid and its conjugate base or a weak base and its conjugate acid.A buffer can resist changes in pH because it can neutralize small amounts of acid or base that may be added to it.

The pH of a buffer solution depends on the dissociation constant (K a) of the weak acid in the solution and the ratio of weak acid to its conjugate base.If a small amount of acid is added to the buffer, the base component of the buffer

reacts with the acid to neutralize it, forming the conjugate acid. If a small amount of base is added, the acid component reacts with the base to form the conjugate base of the buffer.A buffer solution will be most effective when the pH of

the solution is close to the pK a of the weak acid component. At this pH, the buffer will be able to neutralize small amounts of acid or base without undergoing a significant change in pH.

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A thick layer of ice on a lake can support the weight of a person because ice is a solid state of water, while liquid water cannot support the weight due to its inherent fluidity.

Ice and liquid water are both forms of the same substance, H2O, but their molecular arrangements and physical properties differ. When water freezes, its molecules form a crystalline structure, creating a rigid network of interconnected ice molecules. This structure gives ice its solid and stable nature, allowing it to bear weight without collapsing. The lattice-like arrangement of molecules in ice makes it capable of withstanding pressure and maintaining its shape.

On the other hand, liquid water lacks a fixed molecular arrangement. The molecules in liquid water are more loosely packed and have higher mobility compared to ice. As a result, liquid water is fluid and doesn't have the structural integrity necessary to support the weight of a person or any significant load. The molecules in liquid water easily flow past each other, adapting to the shape of their container and exhibiting behaviors such as surface tension.

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