Determine the average atomic mass of the following mixture of isotopes of Potassium:

(93.12%) 38.963 amu
(6.88 %) 40.962 amu

a. The balanced equation for the synthesis of ammonia gas is: N\(_{2}\) + 3H\(_{2}\) → 2NH\(_{3}\).

b. The volume of ammonia gas produced is approximately 1934.74 liters.

To determine the volume of ammonia gas produced, we need to use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Given:

Mass of nitrogen = 10 kg

Temperature = 550°C = 823 K

Pressure = 250 atm

First, we need to calculate the number of moles of nitrogen. The molar mass of nitrogen (N\(_{2}\)) is approximately 28 g/mol. Using the given mass of nitrogen (10 kg), we can convert it to grams (10,000 g) and then divide by the molar mass to get the number of moles (357.14 mol).

From the balanced equation for the synthesis of ammonia (N\(_{2}\) + 3H\(_{2}\) → 2NH\(_{3}\)), we know that 1 mole of nitrogen reacts to produce 2 moles of ammonia.

Therefore, the number of moles of ammonia produced is twice the number of moles of nitrogen, which is 2 * 357.14 = 714.29 mol.

Now, we can use the ideal gas law to calculate the volume of ammonia gas. Rearranging the equation, V = (nRT) / P, we can plug in the values:

V = (714.29 mol * 0.0821 L·atm/(mol·K) * 823 K) / 250 atm = 1934.74 L.

So, the volume of ammonia gas produced is approximately 1934.74 liters.

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Answer:

A. it contains a lot of matter

To determine the number of moles of hydrogen needed to crack one mole of the long saturated hydrocarbon chain (C40H82), we can analyze the reactants and products involved in the cracking reaction.

The cracking reaction is given as: C40H82 -> 3 C8H18 + n C2H6. From the equation, we can see that one mole of the long hydrocarbon chain (C40H82) produces three moles of octane (C8H18) and n moles of ethane (C2H6). Since the cracking process involves breaking the carbon-carbon bonds and forming new carbon-hydrogen bonds, the number of hydrogen atoms in the products should remain the same as in the reactant.

The long hydrocarbon chain (C40H82) contains 82 hydrogen atoms, and the products, 3 moles of octane (C8H18), contain (3 moles) * (18 hydrogen atoms/mole) = 54 hydrogen atoms. Therefore, the number of moles of hydrogen needed for cracking one mole of the long hydrocarbon chain can be calculated as: Number of moles of hydrogen = 82 - 54 = 28 moles. Hence, 28 moles of hydrogen are required to crack one mole of the long saturated hydrocarbon chain (C40H82).

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double-replacement reaction

For the first question:

Use the formula: Density = Mass/Volume

Given in the question:

Mass - 1800 mg

Volume - 2 cm3

Calculation

Density = Mass/Volume

= 1800/2

= 900mg/cm3

Therefore, the density is 900mg/cm3.

The discrepancy between the dyes' molecular weights and the distances they traveled on the gel might be explained by the differences in the size, shape, and charge of the dyes.

Gel electrophoresis is a technique used to separate molecules based on their size and charge. In this process, the molecules are subjected to an electric field and migrate through the gel matrix towards the opposite end of the gel. The rate of migration depends on the size, shape, and charge of the molecules.

In the case of dyes, the molecular weight is an important factor in determining the rate of migration. However, other factors such as the size, shape, and charge of the dyes can also play a role in the migration.

For example, larger dyes may move slower than smaller dyes through the gel matrix, despite having a higher molecular weight. This is because larger molecules experience more frictional resistance within the gel matrix and therefore migrate slower. Similarly, dyes with a more elongated or irregular shape may migrate differently than more compact molecules, despite having the same molecular weight.

Additionally, the charge of the dyes can also impact their migration through the gel. Dyes with a higher net charge will migrate faster due to their increased interaction with the electric field. This highlights the fact that the migration rate of a molecule depends more on its shape, charge, and size than solely on its molecular weight.

In conclusion, differences in size, shape, and charge of the dyes can affect how they migrate during gel electrophoresis, leading to a discrepancy between their molecular weights and the distances they travel on the gel. Therefore, when interpreting the results of gel electrophoresis, it is important to consider the size, shape, and charge of the molecules being analyzed, in addition to their molecular weight.

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Answer:

Hello There!!

Explanation:

The answer is C: evaporation because evaporation is the process in which a liquid boils then evaporates and lastly becomes a gas.

hope this helps,have a great day!!

~Pinky~

According to the forces of attraction, when you boil a pot of liquid water, the water turns to steam and rises in the air. This is an example of evaporation.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer:

300 meters for 30 seconds

Explanation:

10*30= 300 therefore giving you your answer.

Vote brainliest!

The common name for corrosion is Rust. The IUPAC name of rust is Iron (III) Oxide. It naturally occurs and has the chemical formula Fe2O3.

The term Rust is defined as the reddish brown coating that often appears on certain types of metal. Rust forms when these metals are exposed to moisture and air. This combination causes a chemical reaction producing the red substance. The chemical name for rust is iron oxide with the chemical formula Fe2O3. Iron or alloys that contain iron such as steel are metals that become rusty. When iron comes into contact with both water and oxygen in the air a chemical reaction occurs over a period of time. This reaction forms a new compound that is iron oxide. Iron oxide is found in nature and is also abundant on Mars.

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Answer:

Ba(ClO)₂

Explanation:

The compound formed from barium and hypochlorite is barium hypochlorite, and its chemical formula is Ba(ClO)₂.

A chemical element with the atomic number 56 is barium (Ba). It belongs to the alkaline earth metal family and when it forms compounds, it has a 2+ charge.

This indicates that two electrons must be rapidly lost by barium in order to produce a stable electron configuration.

One chlorine atom (Cl) and one oxygen atom (O₂) combine to form the anion hypochlorite (ClO-) (O). The hypochlorite ion has a net charge of -1 due to the 1-charged oxygen atom and the 1-charged chlorine atom.

The 2+ charge of barium interacts with the 1- charge of the hypochlorite ion throughout the reaction to create a neutral molecule.

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Answer: 4 (Co, Rh, Ir, and Mt)

Explanation: they’re all part of group 9 from the periodic table

Answer:

The answer is D. Hydrochloric acid solution with a pH of 1.

Explanation:

I just took the same quiz

Hydrochloric acid solution with a pH of 1. Hence, option D is correct.

An acid is an electrolyte that hydrolyses in water to release hydrogen ions.

The lower the pH the greater the concentration of H+ ions. Hydrochloric acid with a pH of 1 is a strong acid and is highly ionised in solution.  It has the most H+ ions.

Hence, option D is correct.

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The idea that only one electron in an atom can exist in a given quantum energy state is known as the Pauli exclusive principle .

The quantum state of a particle is defined bu the values of the quantum numbers , so what this means is that no two electrons in the same atoms can have the same set of quantum number . This is known as the  Pauli exclusive principle , named after the German physicist Wolfgang Pauli .

All transition emit one quantum ( one photon ) of energy , but an energy to lower energy is released .

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Answer:

i would go for the 2nd as far as i know they were a big continent and an earthquake separes them all

The electron configuration of copper is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10.

The electron configuration of an element (in this case; copper) illustrates how electrons are distributed in its atomic orbitals.

The atomic number of copper is 29 and it is a d-block element. According to the Aufbau principle, the electrons fill atomic orbitals of the lowest energy levels first, before filling the higher energy levels in the ground state of an atom or ion.

However, a completely filled d-shell is more stable naturally. Therefore, one electron from the 4s shell goes into the d-orbital so that the copper atom can attain stability.

As a result, when a copper atom loses an electron, it goes out from the 4s shell first.

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Answer:

Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4

Explanation: Hope this helps

Answer:

the answer of this question is 0.000058

The standard (numeric) form of 5.8 x 10⁻⁵ is 0.00005.

The standard (numeric) form is a way of writing very large or very small numbers in a simplified form that uses powers of 10.

In this form, a number is expressed as a single digit between 1 and 10, multiplied by a power of 10. The power of 10 indicates the number of places the decimal point must be moved to the left or right to obtain the original number.

In the case of 5.8x10⁻⁵, the number is a very small one. The power of 10 is negative, which means that the decimal point must be moved to the left by 5 places to obtain the original number.

Here is the expansion of 5.8x10⁻⁵ in the standard (numeric) form:

5.8 × 10⁻⁵

= 5.8 ÷ 100000

= 0.000058

Therefore, 5.8x10⁻⁵ can be expressed in standard (numeric) form as 0.000058.

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Answer:

2.691*10^6 g

Explanation:

Answer:

Compounds change properties when the number of atoms changes

The statement best explains the compound H₂O is not toxic to drink, but H₂O₂ is toxic to drink is compounds change properties when the number of atoms changes. The correct option is C.

H₂O is the chemical formula of water. It is made up of joining hydrogen and oxygen. Water is an essential compound of life. It is present in three forms on the earth.

H₂O₂ is the chemical formula of hydrogen peroxide. It is more viscous than water, and it is used as an antiseptic and used in cleaning cut areas and wounds.

When the atoms are more added to a compound. It changes its property because it becomes a new and different compound. Water and hydrogen peroxide are different compounds.

Thus, the correct option is C. compounds change properties when the number of atoms changes.

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Answer:

CO2 will form

Explanation:

come here ukg-qixc-yjg

Answer:All matter consists of small particles which are in a continual state of motion

Explanation

The concentration of the solution is D) 4.1M

To determine the concentration of the HF solution, we need to use the formula for molarity:

Concentration (M) = moles of solute / volume of solution (in liters)

First, we need to find the moles of HF. The molar mass of HF is 20.01 g/mol (F = 19.00 g/mol and H = 1.01 g/mol). Given the 16.4 g sample, we can find the moles as follows:

Moles of HF = (16.4 g) / (20.01 g/mol) = 0.82 mol

Next, convert the volume of the solution to liters:

Volume in liters = 2.0 x 10^2 mL * (1 L / 1000 mL) = 0.2 L

Now we can find the concentration:

Concentration (M) = (0.82 mol) / (0.2 L) = 4.1 M

So, the concentration is 4.1 M (option D).

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Insulating zirconia ( \(ZrO_2\)) can be made into an electronic conductor by introducing dopants, which are atoms or molecules that are added to the material to change its properties.

These dopants can create oxygen vacancies in the \(ZrO_2\) lattice, which can then act as electron carriers and enable the material to conduct electricity. Some common dopants used for zirconia include yttria (Y2O3), ceria (CeO2), and alumina (\(Al_2O_3\)). By carefully controlling the dopant concentration and processing conditions, it is possible to tailor the electronic properties of \(ZrO_2\) to meet specific application requirements, such as in fuel cells, sensors, and electronic devices.

In summary, insulating  \(ZrO_2\) can be made into an electronic conductor by doping it with impurities like \(Y_2O_3\) or CaO, which create oxygen vacancies and ionic conductivity, leading to electronic conductivity in the material.

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Answer:

D = 2

2H₂0 → 2H₂ + O₂

Explanation:

I'll assume that "DH₂0-DH₂ + O₂" is meant to read:

   DH₂0 → DH₂ + O₂

Water decomposes into oxygen (O2) and hydrogen (H2) molecules.

We are to find a vale of D that will balance this equation.

        DH₂0 → DH₂ + O₂

Count the atoms on both sides of the equation, assuming D is 1 at this point:

 (D = 1)

 Element  Reactant  Product Balanced?

       H            2               2            Yes

       O            1                2            No

We need an additional oxygen atom on the reactant side, so lets try D=2:

2H₂0 → 2H₂ + O₂

 Element  Reactant  Product Balanced?

       H            4               4           Yes

       O            2               2           Yes

The equation is balanced for D = 2:

2H₂0 → 2H₂ + O₂

If a substance requires 2 J of energy to raise its temperature to 1° C, then the amount of joules of energy that will be lost by the material when its temperature drops 1° C will be 2 J.

The amount of energy required to raise the temperature of a substance is equal to the amount of energy that will be lost when the temperature of the substance drops. In other words, the relationship between energy and temperature change is linear and proportional.

Therefore, if 2 J of energy is required to raise the temperature of a substance to 1° C, then 2 J of energy will be lost when the temperature of the substance drops 1° C.

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Answer :  The acid ionization constant (Ka) for the given acid HA is 1.1 x 10^(-5), rounded to two significant figures.

To calculate the acid ionization constant (Ka) for the given acid HA, we must first find its pH using the given concentration of the solution. Then, we can use the pH to find the concentration of H+ ions in the solution. Finally, we can plug these values into the expression for Ka to solve for the acid ionization constant.

The pH of the 0.120 M solution of HA is given to be 3.28. This means that [H+] = 10^(-pH) = 10^(-3.28) = 5.01 x 10^(-4) M.
Now, we can use the expression for Ka: Ka = [H+][A-]/[HA],  Since HA is a weak acid, we can assume that it dissociates as follows: HA + H2O ⇌ H3O+ + A- This means that [A-] = [H3O+], and [HA] = initial concentration of the acid (0.120 M) - [H3O+].

Substituting these values, we get: Ka = (5.01 x 10^(-4) M)^2 / (0.120 M - 5.01 x 10^(-4) M) = 1.1 x 10^(-5). Therefore, the acid ionization constant (Ka) for the given acid HA is 1.1 x 10^(-5), rounded to two significant figures.

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most prolly option D

Explanation:

NaCl + H2SO4 -> Na2SO4 + HCl[g]

The reaction between between common salt and concentrated tetraoxosulphate(vi) acid will liberate Hydrogen chloride gas .

This is the type of reaction in which two or more elements/compounds react  together to form a new substance.

The reaction between common salt and concentrated tetraoxosulphate(vi) acid can be seen below:

NaCl + H2SO4 ⇒ Na2SO4 + HCl(g)

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I think its a natrual gas , i herd it from sombody.

Given what we know, the ability of water to absorb more heat than the other substances mentioned is a reflection of its high boiling point.

This is the temperature at which the substance boils, and subsequently evaporates. Having a higher boiling point means that the substance will be able to absorb much more heat than that of a substance with a lower boiling point.

Therefore, Water molecules have a higher boiling point than molecules of similar size, such as ammonia and methane, reflecting its capacity to absorb large amounts of heat.

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