when a solution of iron(iii) nitrate is mixed with a solution of sodium hydroxide, a rust colored precipitate forms. this precipitate is probably

The nitrogen balance of an active, healthy adult body where body weight and lean body mass are not changing would be B. Nitrogen equilibrium.

Nitrogen balance refers to the difference between nitrogen intake and nitrogen excretion in the body. When an individual is in nitrogen equilibrium, it means that the nitrogen intake from dietary protein and other sources is equal to the nitrogen excretion through various routes, such as urine, feces, and sweat.

In an active, healthy adult body where body weight and lean body mass are stable, the nitrogen intake would be sufficient to meet the body's nitrogen needs, which include protein synthesis for tissue repair and maintenance. The nitrogen excretion would also be balanced, with the amount of nitrogen excreted being equal to the amount of nitrogen taken in.

Therefore, when the nitrogen intake and excretion are in equilibrium, it indicates a state of nitrogen balance in the body. This means that the body is neither gaining nor losing nitrogen, and the individual is maintaining their current body weight and lean body mass.

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In an active, healthy adult body where body weight and lean body mass are not changing, the nitrogen balance would be in a state of (B) nitrogen equilibrium.

Nitrogen balance refers to the balance between nitrogen intake and nitrogen excretion in the body. Nitrogen is primarily obtained through dietary protein intake and is excreted through urine, feces, and sweat.

In a state of nitrogen equilibrium, the amount of nitrogen intake from dietary protein matches the amount of nitrogen excretion, resulting in a stable balance. This indicates that the body is neither gaining nor losing nitrogen over time.

A balanced nitrogen state is generally considered favorable for overall health and maintenance of lean body mass. It suggests that the body's protein needs are being adequately met to support various physiological processes, including tissue repair, muscle synthesis, and immune function.

Therefore, in the given scenario, the nitrogen balance would be categorized as nitrogen equilibrium.

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The new pressure of a nitrogen gas at STP is 0.021atm.

The pressure of a gas can be calculated by using the combined gas law equation as follows:

P₁V₁/T₁ = P₂V₂/T₂

Where;

At STP, a gas has the following:

0.073 × 1/273 = 4.53 × P/353

0.0002674 × 353 = 4.53P

P = 0.021atm

Therefore, 0.021atm is the pressure of the nitrogen gas.

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The new pressure of the gas would be  0.0208 atm.

According to the general gas law, the ratio of the product of the pressure and volume to its temperature is constant.

The general gas law is summarily expressed as the following equation:

\(p_1v_1/t_1\) = \(p_2v_2/t_2\). where:

\(p_1\) = initial pressure of a gas

\(v_1\) = initial volume of the gas

\(t_1\) = initial temperature of the gas

\(p_2\) = final pressure of the gas

\(v_2\) = final volume of the gas

\(t_2\) = final temperature of the gas

In this case:

\(p_1\) = standard pressure = 1 atm

\(v_1\) = 73 mL or 0.073 L

\(t_1\) = standard temperature = 273 K

\(p_2\) = ?

\(v_2\) = 4.53 L

\(t_2\) = 80 + 273 = 353 K

\(p_2\) = \(p_1v_1t_2/t_1v_2\)

   = 1x0.073x353/273x4.53

   = 25.769/1236.69

    = 0.0208 atm

Thus, the new pressure of 73.0 mL nitrogen that was heated to a volume of 4.53 L at STP is 0.0208 atm.

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Answer:

10 must be added

Explanation:

Answer:

The hydronium ion concentration increases to 100 times the original concentration

Explanation:

The pH of a solution is defined as the negative logarithm of the hydrogen or hydronium ion concentration of that solution. It is given by the expression below:

pH = -log[H₃O⁺] = log[H₃O⁺]⁻¹

Assuming the solution was at neutral with original pH = 7;

The new pH of the solution will be = 7 - 2 = 5

At pH = 7;

log[H₃O⁺]⁻¹ = 7

[H₃O⁺]⁻¹ = 10⁷

[H₃O⁺] = 10⁻⁷

At pH = 5

log[H₃O⁺]⁻¹ = 5

[H₃O⁺]⁻¹ = 10⁵

[H₃O⁺] = 10⁻⁵

10⁻⁵ = 10⁻⁷ * 10²

But 10² = 100

Therefore, the hydronium ion concentration increases to 100 times the original concentration

Answer:

B

Explanation:

On Edge

When diluted hydrochloricacid is given to a reactive metal, hydrogen gas is created as a result of the addition of HCl to the reaction mixture that will result in the f.

Both hydrogen ions (H +) and chloride ions (Cl -) would be added to the equilibrium mixture if hydrochloricacid were to be added. Since hydrogen ions are on the right side of the equilibrium, it will shift to the left to make up for this, increasing the concentration of reactants. Because hydrogen ions are on the right side of the equilibrium, the equilibrium will move to the left to make up for this, which will increase the concentration of reactants.

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Answer:

La cantidad de energía disponible de una fuente de energía determinada se denomina recurso energético. La escasez de recursos energéticos (petróleo, carbón y madera) en algunas de las fuentes de energía más utilizadas plantear necesidad de usar otras fuentes investigar el modo más rentable de emplearlas

Explanation:

Answer:

false

Explanation:

its the amount of high-quality energy available from a given quantity of an energy resource minus the high-quality energy needed to make the energy available.

Compounds in order of increasing acidity will be written as d<c<b<a.

The quantity of hydroxyl ions that a basic molecule may create in an aqueous solution is what is known as the acidity of bases. The quantity of hydronium ions that a substance may create in an aqueous solution determines how basic an acid is.

a, b are more acidic than c and d because of OH group attached to sp2 hybridised carbon which provide resonance stability for conjugate base

in c f has -I effect which increases acidity in a, NO2 has -m effect which increases acidity so increasing order is d<c<b<a

that is  cyclohexanol <  2,4-difluorocyclohexanol <  phenol < 2,4-dinitrophenol

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Answer:

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

Explanation:

Here a reaction is given to us and we need to balance the equation . The given reaction is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

So here , we can make a table as ,

\(\begin{array}{c|c} \\ LHS & RHS \\\\ Zn = 1 & Zn = 1 \\\\ SO_4 = 1 & SO_4 =1\\\\ Li = 2 & Li= 2 \\\\ CO_3 = 1 & CO_3 = 1 \end{array}\)

We can see that the number of elements and ions is same on both LHS and RHS . Hence the reaction is already balanced .

Therefore the final reaction would be same as before that is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

I hope this helps .

Answer:

Internal

Explanation:

Internal energy is the sum of kinetic and potential energies of all the molecules in a system.

Step 1

The reaction must be completed and balanced as follows:

C3H8 + 5 O2 => 3 CO2 + 4 H2O

-------------

Step 2

Information provided:

20.0 g of C3H8

10.0 g of O2

----

Information needed:

1 mole of C3H8 = 44.1 g

1 mole of O2 = 32.0 g

(use your periodic table please)

-------------

Step 3

By stoichiometry,

C3H8 + 5 O2 => 3 CO2 + 4 H2O

44.1 g C3H8 ---------- 5 x 32.0 g O2

20.0 g C3H8 ---------- X

X = 20.0 g C3H8 x 5 x 32.0 g O2/44.1 g C3H8

X = 72.6 g O2

For 20.0 g of C3H8, 72.6 g of O2 is needed, but there is only 10.0 g of O2.

Therefore,

Answer:

The limiting reactant = O2

The excess = C3H8

A sample of hydrogen gas is collected over water at 25 c then the pressure of the hydrogen gas alone will be 112.8 kPa.

When more than just gas was present in a container, each element exerts pressure, which is known as partial pressure. It's own partial pressure refers to the force of any gas inside the container.

When there is a combination of two or more gases inside a given volume, the pressure created by each individual gas in the mixture is expressed using the phrase partial pressure. The pressure of something like the component gases has been added to the total pressure of such gas mixture.

The given data:

Total pressure = 116 kPa

Partial pressure of water vapor = 3. 2kPa

pressure of the hydrogen gas alone =?

Pressure of the hydrogen can be calculated by using the formula:

P total = P (hydrogen) + P (water vapor)

116 kPa = P (hydrogen)  +  3. 2kPa

P (hydrogen) = 116 kPa- 3. 2kPa

P (hydrogen) = 112.8 kPa

Therefore, the pressure of the hydrogen will be 112.8 kPa.

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Answer:

volume is the amount of space in a certain object

When OSHA uses a TLV (Threshold Limit Value) in regulations, the TLV becomes a mandatory PEL (Permissible Exposure Limit). This means that employers must ensure workers' exposure to the hazardous substance does not exceed the established PEL, which is based on the TLV. OSHA enforces these PELs to protect workers from potential health hazards in the workplace.

When OSHA uses a TLV in regulations, the TLV becomes a non-mandatory recommendation for occupational exposure limits. OSHA has established its own Permissible Exposure Limits (PELs) which are legally enforceable and mandatory. While OSHA may consider TLVs when establishing or revising PELs, the TLV does not automatically become a PEL. OSHA may also use other sources of information to establish or revise PELs. Additionally, OSHA does not require that TLVs be updated annually, although some organizations that establish TLVs may choose to update them on a regular basis.

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Answer:

hydrogen and nitrogen or something?

Explanation:

Answer:

nitrogin and i forgot the other one srry!!

Explanation:

Since we have been given the balanced reaction, we can just follow the stoichimetry of the reaction to calculate it.

By the stoichimetry, 1 mol of MnO₂ reacts with 4 moles of HCl. using Rule of three, we have:

1 mol MnO₂ --- 4 mol HCl

4.50 mol MnO₂ --- x

So, 18 moles of HCl will react with 4.5 moles od MnO₂ (assuming complete reaction).

Potassium, a metal with one electron in the outermost shell, will react with one chlorine atom.

Potassium (K) has one electron in its outermost shell, while chlorine (Cl) has seven electrons in its outermost shell. To achieve a stable electron configuration, potassium will readily lose its single outermost electron, while chlorine will readily gain one electron to fill its outermost shell.

In the process of chemical bonding, potassium will donate its electron to chlorine, forming an ionic bond. This results in the formation of a potassium ion (K+) and a chloride ion (Cl-).

Since one potassium atom reacts with one chlorine atom, the reaction between potassium and chlorine will result in the formation of one potassium chloride compound.

Therefore, one potassium atom will react with one chlorine atom.

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Answer:

yes and yes and yes and absolutely yes. Yes do it

The frequency of the yellow light is obtained as 5.2 * 10^ 14 Hz.

When we talk about light, we have to be thinking much about that form of energy that we can be able to perceive by the use of our optical eyes. If I switch on the bulb in a room that is dark, everyone can be able to see the light by the use of the eye. This light that can be seen by the use of eye can also be referred to as visible light.

The yellow light is part of the visible spectrum since we can be able to perceive the yellow light by the use of the two optical eyes that we have.

Given that;

1 nm = 1 * 10^-9 m

580 nm =  580 nm * 1 * 10^-9 m/ 1 nm

= 5.87 * 10^-7 m

We know that;

speed = wavelength * frequency

Frequency = speed/wavelength

frequency = 3 * 10^ 8 m/s/5.87 * 10^-7 m

= 5.2 * 10^ 14 Hz

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Answer:

C

Explanation:

No change.

The total number moles of products = The Total number of reactants

A. The product of the reaction sequence is Na[(CH3)2NH2]Cl, where Na is the counterion. There is no chiral center in the structure, so no configuration needs to be shown.

A reaction sequence is a series of chemical reactions in which one reaction leads to the next. It is a set of chemical reactions that takes place one after another in the same order. Reaction sequences can involve single or multiple reactions, and the reactions can be either in the same container or in separate containers. In a reaction sequence, each reaction is dependent on the product of the previous reaction, which then acts as the reactant for the next reaction.

B. There is no chiral center present in the structure, so no configuration needs to be shown.

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Answer:

Explanation:

\(--------------------------------------------\)

According to EarthObservatory, The Earth’s mantle is mostly made of solid rock. The misconception of a liquid mantle arises from expressions like “a subducted tectonic plate sinks into the mantle” or “continental drift”, expressions that implicitly refer to the liquid element.

\(--------------------------------------------\)

Hope this helps! <3

\(--------------------------------------------\)

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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A substance composed of two or more different elements participating in a chemical bond is a compound.

Compounds are formed when two or more elements chemically combine in fixed proportions, resulting in a new substance with unique properties. The elements within a compound are held together by various types of chemical bonds, such as covalent, ionic, or metallic bonds.

In a covalent bond, elements share electrons to attain a stable electron configuration. For example, water (H2O) is a compound formed by the covalent bonding of hydrogen and oxygen. In an ionic bond, one or more electrons are transferred from one element to another, creating ions with opposite charges that attract each other.

Compounds exhibit different properties than their constituent elements, which distinguishes them from mixtures, where elements or compounds are physically combined without chemical bonding.

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only eukaryotes can perform cellular respiration. More specifically, the two types of organisms that can do this are autotrophs and heterotrophs.

Examples of heterotrophs: animals, fungi, the majority of bacteria, ...

Examples of autotrophs: grass, algae, a few bacteria, ...

(a) NO⁺ ion: There is one double bond in the Lewis structure for NO⁺ ion.

(b) C₂H₄: There are two double bonds in the Lewis structure for C₂H₄.

Lewis structure is a type of diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. It is based off of the idea put forth by Gilbert Lewis in 1916 that electron pairs between atoms can be thought of as shared bonds between the atoms. Lewis structures show which atoms are bonded to each other and also how many bonds are between them. They also show how many lone pairs of electrons are on the atom. Lewis structures are important for understanding the structure and properties of molecules and their reactivity.

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Oxygen is indeed a gas under normal circumstances. However, the gas transforms into a liquid or a solid at low temperatures and/or high pressure. The air has 0.21 atm of oxygen in it.

The energy-producing process that powers the metabolism rate of most living organisms, respiration, depends heavily on oxygen. All living things, including humans, depend on the air that we breath to survive.

Oxygen is produced by cyanobacteria, algae, and plants. Photosynthesis is how they accomplish this. They convert both water and carbon dioxide create glucose and oxygen using the sunlight's energy. The sugars are used in their diet. Oxygen has small intermolecular forces.

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