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Q9. NH4OH + HBr H2O + NH4Br

is this combustion, synthesis, single reaction, double reaction, decomposition ?

83.3% yield

Explanation:

First, we need to convert 240 g of \(Fe_{2}O_{3}\) into moles:

\(240 \:g \:Fe_{2}O_{3} \:\times(\frac{1\:\text{mol}\:Fe_{2}O_{3}}{159.69\: \text {g}\:Fe_{2}O_{3}})\)

\(=1.50 \:\text{mol}\:Fe_{2}O_{3}\)

Next, find the theoretical Fe yield using molar ratios.

\(1.50 \: \text {mol} \: Fe_{2}O_{3}\: \times (\frac{2\: \text{mol} \: Fe}{1 \:\text{mol} \: Fe_{2}O_{3}})\)

\( = 3.00 \: \text{mol} \: Fe\)

Then convert this back into grams:

\(3.00 \: \text{mol} \:Fe \times (\frac{55.845 \: \text{g} \: Fe}{1 \: \text{mol} \: Fe}) = 168 \: \text{g} \: Fe\)

Note that actual yield is only 140 g Fe so percentage yield is

\(\dfrac{140\:\text{g}\:Fe}{168\:\text{g}\:Fe} \times 100\)%= 83.3%

83.3%

The answer is 83.3%

The lenght multiply with the tall and the tichkness

The Debye model is a model used to estimate the heat capacity of a solid. The model is based on the assumption that the solid consists of a collection of harmonic oscillators.

The Debye frequency is the frequency at which an oscillator oscillates when it is subjected to a force. The Debye temperature is the temperature at which the Debye frequency is equal to the thermal energy. The Debye model can be used to estimate the heat capacity of a metal, semiconductor, or dielectric.

The heat capacity of a metal is typically higher than the heat capacity of a semiconductor or dielectric. The heat capacity of a metal is also typically higher than the heat capacity of a dielectric. The heat capacity of a semiconductor is typically lower than the heat capacity of a dielectric.

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Answer:

149.09 g/mol GOOD LESSONS ♡

Answer:

The answer is 149.09 g/mol

Explanation:

I hope this helps!!

The combinations in which a precipitate will form are: 25.0 mL of 1.00 x 10⁻⁵ M Co(NO₃)₂ and 75.0 mL of 5.00 x 10⁻¹ M Na₂S; and 150 L of 0.0250 M BaCl₂ and 1.25 L of 0.0140 M Pb(NO₃)₂

Precipitation is a chemical reaction that occurs when two soluble salts are mixed to form an insoluble compound. The compound that forms a solid is known as the precipitate. Therefore, to determine if a precipitate is going to form when two soluble salts are combined, we need to look at the solubility of each salt. If one salt is soluble and the other is insoluble, a precipitate will form. If both salts are soluble, no precipitate will form.

Take a look at the following combinations:

1. 25.0 mL of 1.00 x 10⁻⁵ M Co(NO₃)₂ and 75.0 mL of 5.00 x 10⁻¹ M Na₂S: CoS will form as a precipitate.

2. 500 mL of 7.50 x 10⁻⁴ M AlCl₃ and 100.0 mL of 1.70 x 10⁻⁵ M Hg₂(NO₃)₂: No precipitate will form in this combination.

3. 150 L of 0.0250 M BaCl₂ and 1.25 L of 0.0140 M Pb(NO₃)₂: Ba(NO₃)₂ and PbCl₂ will form. PbCl₂ will precipitate as it is insoluble in water.

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The overall standard state free energy change for the coupled reaction of ADP phosphorylation to ATP and electron transfer reactions in Complex II is -44.0 kJ/mol.

To determine the overall standard state free energy change (ΔG) for a coupled reaction involving the phosphorylation of ADP to ATP and electron transfer reactions in Complex II, we can use the equation,

ΔG_total = ΔG_phosphorylation + ΔG_electron_transfer

ΔG_phosphorylation = -30.5 kJ/mol

ΔG_electron_transfer = -13.5 kJ/mol

Substituting the values,

ΔG_total = -30.5 kJ/mol + (-13.5 kJ/mol)

ΔG_total = -44.0 kJ/mol

Therefore, the overall standard state free energy change for the coupled reaction of ADP phosphorylation to ATP and electron transfer reactions in Complex II is -44.0 kJ/mol.

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Investigative phenomenon: why certain substances, such as oil and vinegar, don't mixWhen two different substances don't mix, this phenomenon is known as immiscibility. This is due to a lack of solubility between the two materials, which results in their separation.

This immiscibility is what occurs between oil and vinegar when they are mixed.Oil is a nonpolar liquid, while vinegar is an acidic polar liquid. Nonpolar liquids and polar liquids do not mix due to the polarity of the molecules. The reason for this is because the polar molecules interact with one another, while nonpolar molecules don't.

Polar liquids are liquids with molecules that have a positive and a negative end, such as vinegar, while nonpolar liquids are liquids with molecules that have no positive or negative end, such as oil.

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The alanine molecule has a net negative charge at pH 11, where the amine exists as a neutral base and the carboxyl serves as its conjugate base.

The amino acid alanine is necessary for the synthesis of proteins. Vitamin B-6 and tryptophan are broken down using it. It provides the central nervous system and muscles with energy. It helps the body use glucose and boosts the immune system.

The alanine chemical structure reveals that the backbone is made up of two functional groups: the carboxyl group (COOH C O O H) and the amino group (NH2 N H 2), as well as a carbon atom attached to the side chain, CH3 C H 3.

The majority of proteins contain a large amount of the glycogenic amino acid alanine. Alanine can also be produced from other amino acids, particularly branched chain amino acids (BCAA) like valine, leucine, and isoleucine.

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Answer:

Carbon

Explanation:

Carbon is the most important element to life. Without this element, life as we know it would not exist. As you will see, carbon is the central element in compounds necessary for life.

Answer:

Carbon is the most important element

First, let's balance the chemical equation:

Mg(OH)2(aq) + 2 HCl(aq) → MgCl2(s) + 2 H2O(l)

Now, let's calculate the molar masses of the compounds involved using the average atomic masses from the periodic table:

Molar mass of Mg(OH)2 = (1 x atomic mass of Mg) + (2 x atomic mass of O) + (2 x atomic mass of H)

= (1 x 24.31 g/mol) + (2 x 15.999 g/mol) + (2 x 1.008 g/mol)

= 58.33 g/mol

Molar mass of HCl = (1 x atomic mass of H) + (1 x atomic mass of Cl)

= (1 x 1.008 g/mol) + (1 x 35.453 g/mol)

= 36.46 g/mol

Molar mass of MgCl2 = (1 x atomic mass of Mg) + (2 x atomic mass of Cl)

= (1 x 24.31 g/mol) + (2 x 35.453 g/mol)

= 95.21 g/mol

Molar mass of H2O = (2 x atomic mass of H) + (1 x atomic mass of O)

= (2 x 1.008 g/mol) + (1 x 15.999 g/mol)

= 18.02 g/mol

Now, let's calculate the total mass on both sides of the equation:

Left side:

Mg(OH)2(aq) + 2 HCl(aq)

Molar mass of Mg(OH)2 = 58.33 g/mol

Molar mass of HCl = 2 x 36.46 g/mol = 72.92 g/mol

Total mass on left side = 58.33 g/mol + 72.92 g/mol = 131.25 g/mol

Right side:

MgCl2(s) + 2 H2O(l)

Molar mass of MgCl2 = 95.21 g/mol

Molar mass of H2O = 2 x 18.02 g/mol = 36.04 g/mol

Total mass on right side = 95.21 g/mol + 36.04 g/mol = 131.25 g/mol

As we can see, the total mass on both sides of the equation is equal (131.25 g/mol), which demonstrates that both sides of the equation have equal masses, satisfying the law of conservation of mass.

Answer:

True

Explanation:

The greenhouse effect is a natural process that occurs when certain gases in the atmosphere, such as carbon dioxide and water vapor, trap heat from the sun. This keeps the Earth's temperature within a range that is suitable for life. However, an increase in the amount of greenhouse gases, such as from human activities like burning fossil fuels, can intensify the greenhouse effect and lead to global warming. This warming can have a range of impacts on the environment, such as melting ice caps, rising sea levels, and more frequent and severe weather events.

Explanation:

2HCl+2Zn----> 2ZnCl+H2

Explanation:

HCL + Zn= zncl2 + H2

plz mark my answer as brainlist if you find it useful.

Both. The bowling ball has both kinetic energy (KE) due to its velocity and gravitational potential energy (GPE) due to its mass and distance from the ground.

Kinetic energy is the energy of motion. It is the energy that an object has because of its motion. Kinetic energy can be found in all moving objects, from the molecules in a gas to a planet orbiting the sun. The kinetic energy of an object is determined by its mass and velocity. When the velocity of an object changes, its kinetic energy also changes. Kinetic energy is a form of energy that is transformed into other forms of energy, such as heat, light, or sound. It can be used to do work, such as powering a car or a wind turbine. Kinetic energy can also be stored in objects such as a compressed spring or a swinging pendulum.

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Answer:

C. Malleability

Explanation:

The malleability of aluminum allows it to be formed into thin sheets.

Physical properties tells us about what a substance is when no change is occurring to its constituents.

Answer:

C

Explanation:

Explanation:

a) 2 (Cr)³+ + 3 BiO3- + 4 H+ → 3 (Bi)3+ + Cr2O72- + 2 H2O

b)

have posted a similar question in the image for the phosgene i hope it helps little

As substances travel from the small intestines to the large intestine, the H+ ion concentration would increase. This is because the pH of a solution is determined by the concentration of H+ ions. A lower pH indicates a higher concentration of H+ ions, while a higher pH indicates a lower concentration of H+ ions.

In this case, the pH of the small intestines is 7.5, which suggests a lower concentration of H+ ions compared to the pH of 5.5 in the large intestine. The decrease in pH from the small intestines to the large intestine indicates an increase in the concentration of H+ ions.

The change in pH along the digestive tract is primarily due to the secretion and absorption of various substances in different regions. The large intestine, for example, contains bacteria that can produce acids as byproducts of their metabolism, leading to a lower pH.

Overall, the transition from the small intestines to the large intestine results in an increase in the H+ ion concentration, leading to a lower pH in the large intestine compared to the small intestines.

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The question requires us to complete the sentences regarding characteristics and properties of lipids.

First, we need to keep in mind what are lipids: these essential molecules to cell's membranes are typically made of a glycerol backbone, fatty acid "tails" (the hydrofobic part) and and a phosphate group (a hydrophilic part). The term "lipids" is commonly used as a synonym for "fats", which it isn't completely wrong as they share many properties (for example, lipids don't mix with water).

As they are organic molecules, all lipids have carbon, oxygen and hydrogen in their structure, while some of them can contain other elements (such as phosphorus for the phospate group and nitrogen).

Considering the information above, we can complete the sentences as:

1. "Lipids is a general term describing organic molecules that are insoluble in water".

2. "All lipids are made of carbon, hydrogen and oxygen, while some lipids contain other elements..."

To calculate the density of (a) C₂H₄ at 32 °C and 0.75 atm, and (b) He at 57 °C and 791 torr, we'll use the Ideal Gas Law formula: PV = nRT, where P is pressure, V is volume, n is moles of gas, R is the gas constant, and T is temperature in Kelvin.

(a) For C₂H₄ at 32 °C and 0.75 atm:

1. Convert temperature to Kelvin: 32 °C + 273.15 = 305.15 K
2. Rearrange Ideal Gas Law to solve for density: Density = (n/V) = P * (molecular weight) / (R * T)
3. Use values for C₂H₄: Density = (0.75 atm) * (28 g/mol) / (0.0821 L*atm/mol*K) * (305.15 K)
4. Calculate density: ≈ 1.111 g/L (within +/-3% tolerance)

(b) For He at 57 °C and 791 torr:

1. Convert temperature to Kelvin: 57 °C + 273.15 = 330.15 K
2. Convert pressure to atm: 791 torr / 760 = 1.041 atm
3. Rearrange Ideal Gas Law to solve for density: Density = (n/V) = P * (molecular weight) / (R * T)
4. Use values for He: Density = (1.041 atm) * (4 g/mol) / (0.0821 L*atm/mol*K) * (330.15 K)
5. Calculate density: ≈ 0.154 g/L (within +/-3% tolerance)

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An element with atomic number 119 will be an alkali metal with a +1 oxidation state which makes it highly electronegative.

This is described as the tendency of the atom of an element to attract electrons so as to form a bond. This is done so that the elements can achieve a stable octet configuration.

On the other hand, if an element with atomic number 119 was present based on it’s likely position on the periodic table then it will most likely be an alkali metal with a +1 oxidation state and will be highly electronegative as it requires the loss of only one electron in other to achieve a stable configuration thereby making it highly reactive.

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Answer:

A: electrons

Explanation:

Answer:

640 grams

Explanation:

look up Solubility table in wikipedia for potassium nitrate (KNO3)

32 grams of potassium nitrate (KNO3) water solubility at 20 degrees celsius (room temperature) can be dissolved in 100 milliliters (0.1 L) of water.

2 liters = 2000 milliliters

32 grams / 100 milliliters = x grams / 2000 milliliters

cross-multiply

100 * x = 32 * 2000

x = (32 * 2000) / 100

x ≈ 640 grams

chatgpt

Answer:

Closed system. :)

Explanation:

When the lid on the pot of soup is closed, it means matter can no longer escape, which in turn, makes it a closed system. I hope this helps, please let me know if you have any further questions

In order to determine the specific heat capacity of a substance, the following formula can be used:Q = m c ΔTwhere Q is the heat energy transferred to the substance, m is the mass of the substance, c is its specific heat capacity, and ΔT is the change in temperature of the substance.

In the given problem, 14000 J of energy is transferred to 1.5 kg of liquid A. The temperature of liquid A rises from 12°C to 19°C. Therefore, we can plug in these values into the formula:14000 = 1.5 x c x (19-12)14000 = 1.5 x c x 7Simplifying this equation, we can cancel out 1.5 and multiply 7 by c:14000 / (1.5 x 7) = c

Therefore, the specific heat capacity of liquid A is approximately 1333 J/kg °C.

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When the solvent is poured into the funnel at a rate of 60 milliliters per second and the solvent flows out of the funnel at a rate of 40 milliliters per second, it will take 10.05 seconds before the funnel overflows.

The volume of a cone defines the space or the capacity of the cone. A cone is a three-dimensional geometric shape having a circular base that tapers from a flat base to a point called apex or vertex.

V = 1/3(πr²h)

where r is the radius and h is the height of the cone.

Given a funnel is getting filled with the solvent at a rate of 80ml per sec and the solvent is coming out of the funnel at a rate of 65ml per sec.

rate at which the funnel is getting filled is 60-40= 20 ml per sec.

So, this means that the funnel is getting filled at a rate of 20 ml per sec.

For the funnel to overflow it need to be filled completely.

The time before the funnel gets overflowed is = volume of funnel/ rate

A funnel is in the shape of an inverted cone.

The volume of the funnel V = 1/3(πr²h)

V = 1/3 (3.14 ×4² ×12)

V = 1/3 (602.88)

V = 200.96 cm³

Time before the funnel gets overflowed is 200.96/20

= 10.05  Sec

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The first level of DNA organization in a eukaryotic cell is maintained by histone molecule. A histone is a protein that gives chromosomes structural support.

A kind of protein that is present in chromosomes. Histones bind to DNA, assist shape chromosomes, and regulate the expression of genes. The lengthy DNA molecules that make up each chromosome must fit inside the cell nucleus. The chromosome takes on a more compact shape as a result of the DNA wrapping around complexes of histone proteins.

Eukaryotic creatures are big and complicated because eukaryotic cells include nuclei that are encased in nuclear membranes. Eukaryotic cells are found in protozoa, fungi, plants, and mammals. A membrane-bound nucleus is a feature of eukaryotic cells. Chloroplasts can be found in plants and algae, while other membrane-bound organelles like the mitochondria and golgi apparatus are frequently seen in eukaryotic cells.

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The type of reaction where one element replaces a similar element in a compound is called a single replacement reaction or a displacement reaction.

A single replacement reaction, also known as a displacement reaction, is a type of chemical reaction in which one element replaces another element in a compound.

In these reactions, a more reactive element replaces a less reactive element in a compound. The general form of a single replacement reaction can be represented as:

A + BC → AC + B

In this equation, A is the more reactive element that replaces B in the compound BC to form the new compound AC. The reaction occurs because A is more reactive than B and can displace it from the compound.

For example, the reaction between zinc (Zn) and hydrochloric acid (HCl) can be represented as:

Zn + 2HCl → ZnCl2 + H2

In this reaction, zinc is more reactive than hydrogen and displaces it from the hydrochloric acid to form zinc chloride and hydrogen gas.

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            Precipitate definition (Entry 2 of 3) 1: a substance that has been physically or chemically isolated from a solution or suspension, typically in the form of an insoluble crystalline or amorphous solid. 2: a byproduct, outcome, or result of a procedure or action. adjective. precipitate.

Precipitation Illustration

        Silver chloride will solidify out of solution when silver nitrate and sodium chloride are combined in water. Silver chloride is the precipitate in this instance.

       Solids are created by the process of precipitation after two chemicals react. The downword () arrow symbol is used to represent the production of precipitate in this type of reaction.

      It happens between the reactant ions in the aqueous solutions that give rise to the material. Complete response: Precipitation includes the following: snow, sleet, hail, and rain.

       An excess of the light blue precipitate dissolves to create an inky transparent solution. A little amount of sodium hydroxide solution and subsequently an excessive amount are added to solution W. There develops an insoluble white precipitate.

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Answer:

D

Explanation:

A single-replacement reaction occurs when one element replace another in a single compound.

\(single replacement = dual replacement = d - 1 replacement = e - d-e = single replacement or 1^2 x^{2} \lim_{n \to \infty} a_n x \left \{ {{d=2} \atop {e=2}} \right.\)

Answer:

it's volume also decrease