in the hydrogenation of double bonds, a catalyst is needed. in the first step, the reactants must come into contact with a metal surface. this step is known as

If the resistor is in series to the voltage supply then 0.12A current will also flow through it.

(How the resistor is placed in relation to the supply is unknown)

 overall equation is ,

2FeSo4+heat→Fe203+SO2+SO3

Decomposition reaction is when Reactant break down into simpler parts .

For decomposition reactions require energy input. The decomposition reaction happens in our everday life. The process of digestion food is a type of decomposition ,where breakdown of food from larger to smaller particles and large amount of energy release.

The decomposition is classified into

*thermolysis

*Electrolysis

*photolysis

The overall equation will be

2FeSo4+heat→Fe2O3+SO3+So2

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EDTA (ethylenediaminetetraacetic acid) is commonly used to determine the hardness of water due to its ability to form complexes with metal ions, particularly calcium and magnesium ions.

Water hardness refers to the concentration of calcium and magnesium ions present in water. These ions can cause scaling, reduce the effectiveness of soaps, and have other negative effects. EDTA acts as a chelating agent, meaning it can bind to metal ions and form stable complexes.

In the process of determining water hardness, a known amount of EDTA solution is added to a water sample. The EDTA molecules form complexes with the calcium and magnesium ions present in the water.

The endpoint of the titration is reached when all the metal ions are complexed by the EDTA, resulting in a color change or an indicator reaching a specific endpoint.

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The hydronium ion concentration is approximately 2.65 x 10^-5 M, and the pH of the 0.20 M solution of hypochlorous acid is approximately 4.58.

To find the hydronium ion concentration and pH of a 0.20 M solution of hypochlorous acid (HClO), we will use the given Ka value (3.5 x 10^-8) and follow these steps:

1. Write the dissociation equation of hypochlorous acid:
HClO ⇌ H⁺ + ClO⁻

2. Set up the initial concentrations (in moles per liter):
[HClO] = 0.20 M
[H⁺] = 0 (initially)
[ClO⁻] = 0 (initially)

3. Define the changes in concentration:
HClO will lose x moles, and H⁺ and ClO⁻ will gain x moles each.

4. Set up the equilibrium concentrations:
[HClO] = 0.20 - x
[H⁺] = x
[ClO⁻] = x

5. Use the Ka expression:
Ka = [H⁺][ClO⁻] / [HClO]
3.5 x 10^-8 = (x)(x) / (0.20 - x)

6. Since Ka is very small, we can assume that x is much smaller than 0.20, so (0.20 - x) ≈ 0.20. This simplifies the equation:
3.5 x 10^-8 = (x)(x) / 0.20

7. Solve for x (the hydronium ion concentration):
x² = 3.5 x 10^-8 * 0.20
x² = 7.0 x 10^-9
x = √(7.0 x 10^-9)
x ≈ 2.65 x 10^-5 M

8. Calculate the pH:
pH = -log[H⁺]
pH = -log(2.65 x 10^-5)
pH ≈ 4.58

The hydronium ion concentration is approximately 2.65 x 10^-5 M, and the pH of the 0.20 M solution of hypochlorous acid is approximately 4.58.

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Answer:

The volume of container is 39.14 L.

Explanation:

Given data:

Number of moles of neon = 4.0 mol

Pressure of gas = 2.5 atm

Temperature of gas = 25°C

Volume of container = ?

Solution:

we will use general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

25+273 = 298 K

Now we will put the values in formula.

2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K ×  298 K

V = 97.86 atm.L /2.5 atm

V = 39.14 L

The volume of container is 39.14 L.

Answer:

hehe you might think im crazy but this answer makes no sEnSe

Explanation:

Answer:

C. H2(g)

Explanation:

The statement that is not true is: d. Evaporation preferentially releases ions such as Na and K into the atmosphere. Seawater is not simply concentrated river water because it undergoes various processes that modify its composition.

Explanation: When evaporation occurs, water molecules leave the surface and enter the atmosphere, but ions like Na and K generally do not evaporate with water. Instead, these ions remain in the seawater, making it saltier.

The other three statements are true and contribute to the differences between seawater and river water:
a. Hydrothermal activity removes some ions (e.g., \(Mg_2^+\)) and adds others (e.g., \(Ca_2^+\)): Hydrothermal vents at the seafloor release hot fluids, which can dissolve minerals from the Earth's crust. These fluids can remove ions like \(Mg_2^+\) from the seawater and introduce new ions, such as \(Ca_2^+\), altering the composition of seawater.
b. Volcanic gases add components such as chloride (\(Cl^-\)) and sulfate (\(SO_{4}^{2-}\)): When volcanoes erupt, they release gases that can dissolve in seawater. These gases contain components like chloride and sulfate, which contribute to the salinity of seawater.
c. Biological activity such as the formation of shells removes some ions (e.g., \(Ca_2^+\)): Marine organisms like mollusks and corals extract ions like \(Ca_2^+\) from seawater to build their shells and skeletons. This process helps to remove these ions from the seawater, altering its composition.

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Elements are now organized by increasing atomic mass. Hence, option B is correct.

The periodic table is a tabular array of chemical elements organized by atomic number.

Mendeleev's periodic table orders the elements based on their atomic mass whereas the Modern periodic table orders the elements based on their atomic number.

Hence, option B is correct.

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Answer:

The earth-atmosphere energy balance is the balance between incoming energy from the Sun and outgoing energy from the Earth. When it reaches the Earth, some is reflected back to space by clouds, some are absorbed by the atmosphere, and some is absorbed in the Earth's surface. ...

Explanation:

Answer:

Acid Spills (hydrochloric or sulfuric acid):

Neutralize spill with sodium bicarbonate/baking soda 2. Wait until bubbling/fizzing has stopped 3. When using a neutralizing spill kit, the kits are buffered and will not have a bubbling action.

Control and Containment of Spill

The first step in cleaning up a chemical spill should involve the control and containment of the spill. Before commencing the clean-up of a chemical spill, all personnel must be wearing the appropriate PPE including safety goggles, gloves and long-sleeve lab coats.

Answer:

3.01 * 10 ^ 23 atoms of Pt

Explanation:

1 mole of Pt contains 6.02 * 10 ^ 23 atoms of Pt

195.084 g of Pt has  6.02 * 10 ^ 23 atoms of Pt  

97.6 g = .5 moles so  

97.6 g of Pt has 3.01 * 10 ^ 23 atoms of Pt

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

Given:

The mass of platinum = 97.6 grams

To find:

The number of platinum atoms in 97.6 grams.

Solution:

Mass of platinum = 97.6 g

Moles of platinum =\(\frac{97.6g}{195.084 g/mol}=0.500 mol\)

According to the mole concept:

1 mole = Avogadro Number = \(N_A=\) \(6.022\times 10^{23} atoms/ molecules/ions\)

The number of platinum atoms in 0.500 moles of platinum:

\(=0.500\times 6.022\times 10^{23} atoms\\\\=3.011\times 10^{23} atoms\)

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

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-2 and 0  was the velocity over the entire trip

An object's velocity, which encompasses both its speed and direction of motion, is equal to the rate at which its location changes. The acceleration is determined by how quickly an object's velocity changes.

Similar to how distance and displacement are connected, speed and velocity are also related. Velocity is a vector, whereas speed is a scalar. The letters v (italic) stand for velocity and v for speed (boldface). A bar appears over the symbol for average values.

A train travelling at an average speed of 50 km/h in the south will go north at a speed of 50 km/h.

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A temperature reversal is a layer in the air where air temperature increments with level. The lower part of a cap has an inversion. The cap is a layer of relatively warm air above. In the winter, a long, clear night is ideal for temperature inversion.

It ensures that the heat that escapes is greater than the heat that enters. Nevertheless, air should not be mixed vertically at lower levels. The earth is cooler than the air above it in the early morning hours because the day's heat is reflected off during the night. Temperature inversion is typical over polar regions.

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Hydrogen chloride (HCl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and NaCl(aq).

The reactants in the following equation:

HCl (a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na C l (aq) are hydrogen chloride (HC l) and sodium bicarbonate (NaHCO3).

Explanation:

A reactant is a substance that undergoes change during a chemical reaction. A reaction equation includes the symbols and formulas of reactants and products, along with the physical states of the substances, as they appear before and after the reaction.

The chemical reaction in this question is: HC l(a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na Cl (a q)In this equation, the reactants are H Cl (a q) and NaHCO3(a q), which are in an aqueous state.

Therefore, hydrogen chloride (H Cl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and Na Cl (a q).

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The binding of oxygen and carbon monoxide to hemoglobin is determined by their affinities for the heme iron center in the hemoglobin molecule.

Their affinities for the heme iron center in the hemoglobin molecule control the binding of oxygen and carbon monoxide to hemoglobin. Compared to oxygen, hemoglobin has a stronger affinity for carbon monoxide. This affinity results from the stronger bond that carbon monoxide forms with heme iron. An open coordination site on the iron atom in the heme group allows for interactions with either oxygen or carbon monoxide.

Compared to the bond formed by oxygen and iron, the one formed by carbon monoxide is both more potent and stable. As a result, hemoglobin shows a preference for binding carbon monoxide over oxygen when both gases are present.

Serious consequences for human health may result from this predilection for carbon monoxide binding. Hemoglobin quickly bonds to carbon monoxide molecules in situations when carbon monoxide is present, such as in cases of carbon monoxide poisoning, which decreases hemoglobin's ability to deliver oxygen. Life-threatening oxygen depletion in tissues and organs can result from this. Due to hemoglobin's high affinity for carbon monoxide, even very low levels of this gas can have a major impact on the body's ability to carry oxygen.

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Answer:

The point at which the lines intersect represents the triple point.

Table salt, also known as sodium chloride, is a chemical compound that is made up of the elements sodium and chlorine. Sodium and chlorine, both of which are very reactive, combine to form a stable compound known as table salt. Sodium is a metallic element that is located in Group 1 of the periodic table, while chlorine is a nonmetallic element that is located in Group 17 or 7A of the periodic table.

Table salt is a well-known compound that has a variety of applications, including as a food seasoning, a food preservative, and an ingredient in chemical manufacturing. In addition to its taste-enhancing properties, sodium chloride is essential for maintaining proper fluid balance in the body, aiding nerve and muscle function, and transporting nutrients across cell membranes. Despite its many benefits, excessive intake of table salt can lead to high blood pressure and other health problems. To avoid this, it is recommended that people consume salt in moderation and pay attention to their sodium intake from other sources as well.

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Step 1

The reaction:

CaCO3 + heat => CaO + CO2 (completed and balanced)

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

Step 2

Information provided:

Actual yield = 0.53

Answer: The frequency is 7.047 Hz. It comes under ultraviolet radiation

Explanation:

We know that v = λ x f ................. (1)

where v ⇒ velocity of the wave

f ⇒ frequency of the wave

λ ⇒ wavelength of the wave

Since we know that the given wave is electromagnetic radiation,

v = 3 x 10⁸ m/s

λ = 4.257 x 10^-9 m (Given)

Substituting in (1), we get

f = v / λ

f = 3 x 10^8 / 4.257 x 10^-9

f = 7.047 x 10^16 Hz

Since the frequency is in the order of 16, the given radiation is ultraviolet radiation

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The amount or initial volume of the acid required is determined as 60 mL.

The amount of 12.5 molar acid required to create a 250.0 mL solution is calculated by using the following formula

C₁V₁ = C₂V₂

Where

The given parameters include;

Initial concentration of the acid, C₁ = 12.5 M

Final concentration of the acid, C₂ = 3.0 M

Final volume of the acid, V₂ = 250.0 mL

V₁ = ?

The amount or initial volume of the acid required is calculated as;

12.5 (V1) = 3  x 250

V₁ = (3 x 250 ) / 12.5

V₁ = 60.0 mL

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Answer:

Explanation:

Each share costs $36000/4500

= $8

800 shares will cost 800*8

= $6400

Find attached the journal

Quantum mechanics is the study of atoms and incredibly tiny particles that are even smaller.

In quantum mechanics, another branch of physics, atomic and subatomic particles are investigated. The primary field of science that deals with the study of atoms and molecules is chemistry. By utilizing their knowledge of atoms, chemists create molecules that resemble drugs. A distinction is established between atomic physics, which studies the atom as a system made up of a nucleus and electrons, and nuclear physics, which explores nuclear reactions and special properties of atomic nuclei. Three subatomic particles make up matter: protons, neutrons, and electrons. The only subatomic particles that have electrical charges are protons and electrons, with protons having a positive charge and electrons having a negative charge.

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The balance equation is 2GaBi3 + 3Na2SO3 → 3Ga2(SO3)3 + 3NaBr.   The equations are balanced by adjusting the coefficients of each compound so that the number of atoms for each element was the same on both sides of the equation.

The specified chemical equation is not balanced. The first step in balancing a chemical equation is to ensure that the number of atoms for each element is the same on both sides of the equation.

The balanced equation is:

GaBi3 + 3Na2SO3 → Ga2(SO3)3 + 3NaBr

This balanced equation has the same number of atoms for each element on both sides of the equation. First, balance the Ga and Bi atoms by putting a factor of 2 in front of GaBi3 to get 2GaBi3. Then put a factor of 3 in front of Na2SO3 to balance the Na atoms and get 3Na2SO3. Finally, put a factor of 3 in front of Gaz(SO3)ç to balance the S and O atoms and get 3Ga2(SO3)3. So the balanced equation would be:

2GaBi3 + 3Na2SO3 → 3Ga2(SO3)3 + 3NaBr

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Answer: C.) Xe

Explanation: To figure out the answer go to the Noble Gas Family and count down 5 elements.

According to the electronic configuration the symbol which would be included in the noble gas notation for an element that had valence electrons in the 5 s subshell is xenon  .

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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The substance that will increase the molar solubility of nickel(II) phosphate in a saturated solution is c. Na3PO4 (sodium phosphate).

To determine the substance that will increase the molar solubility of nickel(II) phosphate, we need to consider the common ion effect and the solubility product principle.

Nickel(II) phosphate has a chemical formula of Ni3(PO4)2, and its solubility can be affected by the presence of other ions in solution. In this case, we are looking for a substance that will introduce an ion that can form a more soluble compound with one of the ions in nickel(II) phosphate.

Among the given substances, Na3PO4 is the only one that introduces an ion (PO4^3-) that can form a more soluble compound with one of the ions in nickel(II) phosphate. When sodium phosphate is added to a saturated solution of nickel(II) phosphate, the PO4^3- ions will combine with the Ni^2+ ions to form the more soluble compound sodium nickel phosphate (Na2Ni(PO4)2).

The other substances (a. (NH4)3PO4, b. NH4Cl, d. KOH, and e. HNO3) do not introduce ions that can form more soluble compounds with the ions in nickel(II) phosphate. Therefore, they will not increase the molar solubility of nickel(II) phosphate.

Among the given substances, sodium phosphate (Na3PO4) is the only one that will increase the molar solubility of nickel(II) phosphate in a saturated solution.

Sodium phosphate introduces PO4^3- ions, which can combine with the Ni^2+ ions to form a more soluble compound. The other substances do not have ions that can form more soluble compounds with nickel(II) phosphate.

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