The unknown element (Johnsonium, Jo) contains three naturally occurring isotopes. The relative abundances and atomic mass are:
Moorium-36: abundance = 1.32%, mass = 35.978amu
Moorium-38: abundance = 3.25%, mass = 37.963amu
Moorium-40: abundance = 95.43%, mass = 39.962amu
What is the average atomic mass of "Moorium?"

The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g

From the question given, the following data were obtained:

The mass of oxygen gas produced from the reaction can be obtained as follow:

Mass of potassium permanganate = Mass of remaining substance + mass of oxygen

Inputting the given parameters, we have:

15.8 = 14.2 + mass of oxygen

Collect like terms,

Mass of oxygen = 15.8 - 14.2

= 1.6 g

Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g

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The mass of scheelite (\(CaWO_4\)) containing a trillion \((1.000*10^1^2)\) oxygen atoms is calculated to be approximately 91.26 grams.

To calculate the mass of scheelite (\(CaWO_4\)) containing a trillion oxygen atoms, we need to consider the molar mass of the compound and the ratio of oxygen atoms in its chemical formula. The molar mass of \(CaWO_4\)can be calculated by adding the atomic masses of calcium (Ca), tungsten (W), and four oxygen (O) atoms.

The atomic masses of Ca, W, and O are approximately 40.08 g/mol, 183.84 g/mol, and 16.00 g/mol, respectively. Adding these masses gives us a molar mass of 287.92 g/mol for \(CaWO_4\).

Next, we need to find the number of moles of oxygen atoms in one trillion (\(1.000*10^1^2\)) oxygen atoms. Since there are four oxygen atoms in one mole of \(CaWO_4\), we can divide the given number of oxygen atoms by Avogadro's number \((6.022*10^2^3)\) and then divide by four to find the number of moles of \(CaWO_4\).

\(1.000*10^1^2 / (6.022*10^2^3) / 4 = 2.085*10^-^1^1 moles\)

Finally, we can calculate the mass of \(CaWO_4\) by multiplying the number of moles by the molar mass:

\(2.085*10^-^1^1 moles * 287.92 g/mol = 5.995*10^-^9 grams\)

Rounded to four significant digits, the mass of scheelite containing a trillion oxygen atoms is approximately 91.26 grams.

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1. compound

 2. element  

   3. element

4. compound  

5. compound

6. element

7. compound

     8 element

Answer:

Titrations. Because a noticeable pH change occurs near the equivalence point of acid-base titrations, an indicator can be used to signal the end of a titration. When selecting an indicator for acid-base titrations, choose an indicator whose pH range falls within the pH change of the reaction.

Hope it helped!!

The molar solubility of BaF₂ in a solution containing 0.0750 M is measured as 3.022 × 10⁻⁴ M.

Option B is correct.

Let the solubility be x moles:

So, moles of Ba²⁺ = x

                moles of F- = 0.075 + 2x

                  x(0.075+2x)² = Ksp = 1.7 × 10⁻⁶

                0.075 + 2x approximately = 0.075

                     x = 3.022 × 10⁻⁴ M

Temperature, pressure, and the solid's polymorphic form all affect solubility. Thermodynamic solvency is the convergence of the solute in immersed arrangement in balance with the most steady gem type of the strong compound.

The salt's concentration in the equation is determined by the solubility value, which indicates how much of the salt dissociates into ions. As a result, we can use the molar ratio of the ions to the salt to determine their concentration.

Incomplete question:

Determine the molar solubility of BaF2 in a solution containing 0.0750 M LiF. K sp (BaF 2) = 1.7 × 10 -6.

A. 8.5 × 10-7 M

B. 3.0 × 10-4 M

C. 0.0750 M

D. 1.2 × 10-2 M

E. 2.3 × 10-5 M

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Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Hence, Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

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Answer:

B is the answer.

Explanation:

sry if wrong :D

We have a total of 9.27 moles of the molecule that weights 134.1 g/mol.

The molecular mass of the molecule is 134.7 g/mol.

The amount of the molecule that we have is 1.25kg.

We know,

1 kilogram = 1000 grams.

1.25 kilograms = 1250 grams.

The mass of the amount of molecule we have is 1250 grams.

The moles of a molecule are given by,

Moles = Mass that we have/molecular mass

Putting the values accordingly,

Moles = 1250/134.7

Moles = 9.27 moles.

So, we have 9.27 moles of that molecule whose molecular mass is 134.1 g/mol.

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Answer:

2 H₂O → 2 H₂ + 1 O₂

Explanation:

There are 2 hydrogen atoms on both the sides of the equation. However there is 1 oxygen atom on the left side and 2 oxygen atoms on the right side. So we multiply the 1 atom with 2 to get two oxygen atoms. The equation would look like this:

2 H₂O → 1 H₂ + 1 O₂

Now if you check whether both the sides has equal number of elements, on the left side hydrogen has 4 hydrogen atoms and the right side has 2. Therefore we multiply it with 2 because that gives 4. Thus the equation is balanced.

Answer:

answer

Explanation:

explination

Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

The elements arranged in increasing order of the most positive electron affinity for each group are:

(a) Li, Na, K

(b) I, Br, Cl, F

(c) Ba, Ca, Si, P, O

(a) Li, Na, K: In this group, the electron affinity increases as we move from left to right in the periodic table. Therefore, the elements arranged in increasing order of the most positive electron affinity are Li, Na, and K.

(b) F, Cl, Br, I: In this group, the electron affinity generally increases as we move from left to right and from bottom to top in the periodic table. Therefore, the elements arranged in increasing order of the most positive electron affinity are I, Br, Cl, and F.

(c) O, Si, P, Ca, Ba: In this group, the electron affinity generally increases as we move from left to right and from top to bottom in the periodic table. Therefore, the elements arranged in increasing order of the most positive electron affinity are Ba, Ca, Si, P, and O.

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7.273 - 12.37 = -5.097

Answer:

-5.10

Explanation:

7.273 - 12.37 = -5.097

round up!

:)

Communists and the Guomindang were equally afraid of the warlords that controlled Northern China hence they had to cooperate in the Northern expedition of 1926.

The region of Northern China was controlled by warlords. Both the Communists and the Guomindang were equally afraid of the warlords that controlled Northern China hence they had to cooperate in the Northern expedition of 1926.

The relationship between the Communists and the Guomindang  and their cooperation led to the fall of the republic of China.

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last one? don't take my word though

Explanation:

the suns heat is related to nuclear fusion

The element you are referring to is sodium. Sodium is found in high concentrations in the ocean and is essential for many biological processes.

However, pure sodium metal reacts violently with water, producing hydrogen gas and releasing a large amount of heat.

This reaction can be dangerous and is often used as a demonstration of the reactivity of alkali metals.

To prevent this reaction from occurring, sodium is typically stored under oil or inert gas to prevent exposure to moisture in the air.

Additionally, sodium is often used in alloys with other metals to reduce its reactivity and make it more stable.

Overall, while sodium is an important element in the ocean, its pure form must be handled with care due to its highly reactive nature.

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Answer:

Column A represents the variable to be plotted on the X-AXIS.

Column B represents the variable to be plotted on the Y-AXIS.

In a position vs time graph, time is always plotted on the X-AXIS.

The study of chemicals and bonds is called chemistry. There are two types of solution in the chemical nature, that is an acid and basic solution.

The correct answer is X-axis.

According to the question,

In a position vs time graph, time is always plotted on the X-AXIS.

Hence, the correct answer to the question is TIME on X-axis.

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The presence of non-bonding electron pairs turned into the commonplace feature of the molecules wherein the actual bond perspective was much less than the model bond attitude.

Electron pairs refer to two electrons that are paired together and occupy the same orbital in an atom or molecule. These pairs of electrons can be found in the valence shell of atoms and are involved in chemical bonding, determining the shape and properties of molecules.

There are two types of electron pairs: bonding pairs and non-bonding pairs. Bonding pairs are involved in covalent bonding, where two atoms share electrons to form a stable molecule. Non-bonding pairs, also known as lone pairs, do not participate in chemical bonding and occupy orbitals that are not involved in bonding. The arrangement of electron pairs determines the shape of a molecule. For example, in a molecule with four electron pairs, the pairs will arrange themselves in a tetrahedral shape.

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Complete Question: -

Table 1 Model Bond Angle Lewis Structure Bonding Non- e pairs bonding (central e pairs atom) (central atom) Total electron pairs (central atom) CH4 NH3 H2O BF3 SO2 CO2

Question 1: Considering that all electrons are negatively charged, do the bonding and non-bonding electron groups on the central atom experience repulsive or attractive forces?

The gravitational force is related to the distance between two objects because it is inversely proportional to the square of the distance.

The gravitational force refers to the attraction between two different objects due to their masses.

This force (gravitational force)  is fundamental for maintaining the distance of objects in the Universe.

In conclusion, the gravitational force is related to the distance between two objects because it is inversely proportional to the square of the distance.

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Answer:

3 moles of Argon

Explanation:

The molar mass for argon is 39.948 g/mol

\(\frac{120g}{39.948g/mol} = 3.004molesAr\)

Answer:

No they are not

Explanation:

Energy levels of electrons have fixed distance from the nucleus of an atom where electrons may be found.

orbitals is the path that electrons revolve

The particular significance of valence electrons is - 2) Valence electrons form chemical bonds between atoms by being transferred or shared.

A valence electron is an electron that is part of an atom's outer shell and can take part in the synthesis of a chemical bond if the outer shell is open. Each atom in the bond contributes one valence electron, forming a shared pair in a single covalent bond. Atoms are bound together by attractive forces called chemical bonds. Valence electrons, which make up an atom's outermost electronic "shell," interact to form bonds. Covalent bonds are the bonds in which the valence electron density is shared by the two atoms. They are formed between atoms with equal or similar electronegativity.

Valence electrons are exchanged between atoms, usually a metal and a nonmetal, to create ionic bonds. Ions can follow the octet rule and become more stable when one or more of their valence electrons are lost or gained. Ions therefore interact in ways that balance their charges. Chemists examine the exchange or sharing of electrons during chemical reactions. The valence electrons that are lost, gained, or shared are those electrons.

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Answer:

Explanation:

this is the answer hope it helps!(:

The chemical formula of pentanitrogen heptachloride is N₅Cl₇ as it has 5 nitrogen atoms and 7 chlorine atoms.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer: Electrons

Explanation: Electrons are much smaller than Protons and Neutrons. Protons and neutrons each weigh about 1 amu.

K = 1.3104 based on the provided data and because K is high and positive, the reaction is in the product's favor.

Equilibrium point is the condition where there is no overall change in the amount of either reactants or products throughout a reversible chemical reaction.

Given data :

O2(g) + 2SO2(g) ↔ 2SO3(g)

Concentration of O2 is [O2] = 0.024 M

Concentration of SO2 is [SO2] = 0.015 M

Concentration of SO3 is [SO3] = 0.26 M

Equilibrium constant, K =..?

Equilibrium constant for the given reaction is -

K = [SO3]² / [O2] [SO2]²

Putting the values of [SO3], [O2] and [SO2] the equilibrium constant, K become:

K = [SO3]² / [O2] [SO2]²

K = 0.26² / 0.024 × 0.015²

K = 1.3×10⁴

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Aerobic organisms must have oxygen in order to develop, breathe, metabolize, and use other vital routes. At the end of the electron transport chain during respiration in these organisms.

oxygen acts as an electron acceptor. Hence, when an obligatory aerobe is incubated in anaerobic conditions, they are unable to grow because there is no oxygen present, which in turn restricts its respiration and metabolism.

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom. It has a relative mass of 9.109 x 10⁻³¹ kg, which is about 1/1836th the mass of a proton. Electrons are responsible for the chemical behavior of atoms, as they are involved in the formation of chemical bonds between atoms. They also play a crucial role in electricity and magnetism, as they are the carriers of electrical charge and can produce magnetic fields. Electrons exist in energy levels around the nucleus, and they can absorb or emit energy to move between energy levels, giving rise to the emission and absorption of light and other electromagnetic radiation. Electrons are also used in various technologies, including electronics, telecommunications, and medical imaging.

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No atoms are lost or made during the chemical reaction so the total mass of the products is equal to the total mass of the reactants. In an atom, protons and neutrons contribute to the mass and since the number of them doesn’t change, the mass doesn’t either.

A girl roller-skating has kinetic energy.

Kinetic energy is the energy of motion. It is the energy possessed by an object due to its movement. In this case, the girl roller-skating has kinetic energy because she is moving.

Potential energy is the energy an object possesses due to its position or configuration. It is the energy an object has stored within it, ready to be released. An object at rest has potential energy because it has the potential to be set in motion and does work.

So, in this case, the girl roller-skating has kinetic energy because she is moving, and not potential energy because she is not at rest.

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Answer:

Shear

Explanation:

The balanced half-reactions for the given redox reaction is

3Zn²+(aq) + 2Cr³+(aq) + 14H₂O(l) → 3Zn(s) + 2Cr₂O₇²-(aq) + 28H⁺(aq)

To write the balanced half-reactions for the given redox reaction, let's split it into oxidation and reduction half-reactions.

Oxidation half-reaction (loss of electrons):

\(3 Zn^2+(aq) + 14 H_{2} O(l) - > 3 Zn(s) + 14 H^+(aq)\)

Reduction half-reaction (gain of electrons):

\(2 Cr^3^+(aq) + 7 H_{2} O(l) - > Cr_2O_7^2^-(aq) + 14 H^+(aq)\)

The oxidation half-reaction shows the zinc ions (\(Zn^2^+\)) losing two electrons and being reduced to solid zinc (Zn). The reduction half-reaction shows the chromium ions (\(Cr^3^+\)) gaining six electrons and being oxidized to the dichromate ion (\(Cr_{2} O_{7} ^2-\)).

we can combine the two half-reactions by canceling out the electrons:

3Zn²+(aq) + 2Cr³+(aq) + 14H₂O(l) → 3Zn(s) + 2Cr₂O₇²-(aq) + 28H⁺(aq)

Thus, the balanced half-reactions for the given redox reaction is

3Zn²+(aq) + 2Cr³+(aq) + 14H₂O(l) → 3Zn(s) + 2Cr₂O₇²-(aq) + 28H⁺(aq)

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