The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

Answer:

sorry i don't know this question answeer

Answer:

A reaction rate is generally the speed (or rate) at which a chemical reaction takes place. It is usually expressed in terms of volume or a unit of time.

Answer:

the speed at which a chemical reaction takes place

Part A is labeled as geosphere, B is biospere and C is hydrosphere.

The Earth can be divided into four interconnected spheres: the geosphere, atmosphere, hydrosphere, and biosphere.

The geosphere refers to the solid, rocky part of the Earth, including the crust, mantle, and core. The mud and dirt surrounding the water puddle would be considered part of the geosphere.

The biosphere includes all living things on Earth and the environments in which they live. The frog sitting at the edge of the water puddle is part of the biosphere.

The hydrosphere refers to all the water on Earth, including oceans, lakes, rivers, and groundwater. The water in the puddle would be part of the hydrosphere.

These spheres are interconnected and influence each other. For example, the biosphere relies on the geosphere for nutrients and minerals, while the geosphere is shaped by the movement of water in the hydrosphere.

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The boiling point of benzene when the external pressure is 440 torr is 80.1 °C (176.2 °F).

What is benzene?

Benzene is an organic compound composed of six carbon atoms in a ring structure, with one hydrogen atom attached to each carbon atom. It is a highly flammable, colorless liquid with a sweet smell. Benzene is a natural component of crude oil and is one of the most important organic chemicals used in industry. It is used in the production of plastics, resins, synthetic fibers, rubber, pesticides, detergents, drugs, and dyes. It is also used as a solvent for fats, oils, waxes, resins, and inks. Benzene is classified as a carcinogen and its exposure can cause a variety of adverse health effects, including acute myelogenous leukemia, lymphomas, and other forms of cancer.

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Answer: Vanadium(III) Sulfide.

Explanation:

The amount of energy required to heat the given amount of lead from 18°C to 44°C is 638.976 J.

The specific heat capacity of lead is 0.128 J/g°C.

To calculate the amount of heat energy required to heat 192 grams of lead from 18°C to 44°C, we can use the formula:

Q = m × c × ΔT

where:

Q = heat energy (in Joules)

m = mass of the substance (in grams)

c = specific heat capacity of the substance (in J/g°C)

ΔT = change in temperature (in °C)

Plugging in the given values:

m = 192 g

c = 0.128 J/g°C

ΔT = (44°C - 18°C) = 26°C

Q = 192 g × 0.128 J/g°C × 26°C

Q = 638.976 J

So, the amount of heat energy required to heat 192 grams of lead from 18°C to 44°C is 638.976 Joules.

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A mineral is a substance such as tin, salt, or sulphur that is formed naturally in rocks and in the earth. Minerals are additionally observed in small portions in food and drink.

Minerals are integral for three essential reasons: building robust bones and teeth. controlling physique fluids inside and outdoor cells. turning the meals you devour into energy.

Minerals are necessary for your body to remain healthy. Your physique uses minerals for many one of a kind jobs, which include maintaining your bones, muscles, heart, and talent working properly. Minerals are additionally necessary for making enzymes and hormones. There are two types of minerals: macrominerals and hint minerals.

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If u click on all of them it gives u an A+ and doesn’t even read what u wrote. So u never really have to try hard on the writing parts just tell them u included them all

Answer:An image will not be formed.

Rays do not converge to or diverge from a common point.

/select all that apply

Explanation:

The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

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False, using changes in tempo and dynamics can make a musical cliché more effective. Hence, option C is correct.

Tempo in a music refers to pace of the music especially in high pitch sound waves. The most common unit of measurement for tempo is beats per minute (BPM), which is just the quantity of beats that may be captured in a minute at a certain pace.

A musical segment or composition is slower when the beats per minute  is lower than when the BPM is greater. While a higher BPM is more likely to make the listener feel excited, a lower BPM is more likely to have a calming and/or sad effect on the listener.

Changing dynamics is some more effective way to make musical cliché. Hence, option C is correct.

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Answer:

A wave is a form of energy therefore, it travels through matter in the form of packets of energy. Examples of waves include light, heat and sound waves. Matter from where the waves travel is known as a medium such as if waves travel through ocean then water is the medium.

Explanation: hope this helps

Answer:

Na, K

Explanation:

From the given choices, the two elements that will react similarly are Na and K.

This is because, Na and K are in the same group on the periodic table.

Na and K are both called Alkali metals and they have just one electron in their outermost shell.

The number of electrons in the outermost of an atom determines their chemical properties.

Since Na and K are in the same group, they chemically combine with other atoms in similar fashion.

Answer:

hello hi what's up

Explanation:

ok bye

Answer:

to make it cold

Explanation:

To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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Explanation

Colloidal solutions, or colloidal suspensions, are nothing but a mixture in which the substances are regularly suspended in a fluid. A colloid is a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance.

Hence, the solute in a colloidal system is also known as the dispersed particle phase

The number of moles in Palladium is 0.00037 moles.

Given that,

Reacting mass of palladium = 0.039g

Molar mass of palladium = 106.42 g/mol

Therefore,

Number of moles = Reacting mass ÷ Molar mass

                             = 0.039 ÷ 106.42

                             = 0.00037 moles.

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The percent yield of CO₂ In the reaction CH₄ + 2O₂ → 2H₂O + CO₂ if 1600g of methane reacts with excess oxygen to produce 2200 is 67.5%.

To calculate the percent yield of CO₂ in the given reaction, we need to first calculate the theoretical yield of CO₂. This can be done by stoichiometric calculations using the balanced chemical equation:

CH₄ + 2O₂ → 2H₂O + CO₂

The molar mass of CH₄ is 16.04 g/mol. Therefore, 1600 g of CH₄ is equivalent to 100 moles of CH₄. According to the stoichiometry of the reaction, 1 mole of CH₄ produces 1 mole of CO₂. Therefore, the theoretical yield of CO₂ is also 100 moles.

The molar mass of CO₂ is 44.01 g/mol. Therefore, the theoretical yield of CO₂ in grams is 4401 g.

The actual yield of CO₂ given in the problem is 2200 g.

Therefore, the percent yield of CO₂ is:

Percent yield = (actual yield / theoretical yield) x 100%

Percent yield = (2200 g / 4401 g) x 100%

Percent yield = 0.499 x 100%

Percent yield = 49.9%.

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Answer:

-198 kJ

Explanation:

Hello there!

In this case, as the reaction is not given but we can see that HBr is formed, we can infer that reaction is:

\(H_2+Br_2\rightarrow 2HBr\)

Whereas the -72 kJ per moles of HBr are:

\(\frac{-72kJ}{2molHBr}\)

Thus, by multiplying by the formed 5.5 moles of HBr, the total energy release is:

\(\frac{-72kJ}{2molHBr} *5.5molHBr\\\\=-198kJ\)

Best regards!

Ionic bonding is a type of chemical bond that occurs when electrons are transferred between atoms to form ions. The resulting ions are attracted to each other by their opposite charges and form an ionic compound. Here is a summary of the information you provided:

Element: Na (sodium)

Number of valence electrons: 1

Dot structure: Na

Transfer of electrons: Na loses 1 electron to become Na+

Ions formed: Na+ and Cl-

Compound formed: Sodium chloride (NaCl)

Name of compound: Salt

Element: F (fluorine)

Number of valence electrons: 7

Dot structure: F

Transfer of electrons: F gains 1 electron to become F-

Ions formed: F- and Mg2+

Compound formed: Magnesium fluoride (MgF2)

Element: O (oxygen)

Number of valence electrons: 6

Dot structure: O

Transfer of electrons: O gains 2 electrons to become O2-

Ions formed: Ba2+ and O2-

Compound formed: Barium oxide (BaO)

Element: Li (lithium)

Number of valence electrons: 1

Dot structure: Li

Transfer of electrons: Li loses 1 electron to become Li+

Ions formed: Li+ and Cl-

Compound formed: Lithium chloride (LiCl)

Element: P (phosphorus)

Number of valence electrons: 5

Dot structure: P

Transfer of electrons: P gains 3 electrons to become P3-

Ions formed: Al3+ and P3-

Compound formed: Aluminum phosphide (AlP)

Element: N (nitrogen)

Number of valence electrons: 5

Dot structure: N

Transfer of electrons: N gains 3 electrons to become N3-

Ions formed: Al3+ and N3-

Compound formed: Aluminum nitride (AlN)

Answer:

Kc = [B₃]²/[A₂]³  = 0.40

Explanation:

3A₂ ⇄ 2B₃  

Given at equilibrium =>  [A₂] =2.5 and [B₃] = 2.5

Kc = [B₃]²/[A₂]³ = (2.5)²/(2.5)³ = (2.5)⁻¹ = 0.40

The correct options that will result in mole are option B, C, and H

To know the options that will result in mole, do the following:

Ideal gas law states as follow:

PV = nRT

Where

PV = nRT

Make n the subject by dividing both sides by RT

n = PV / RT (option B)

Mole, mass and molar mass are related according to the following formula:

Mole = mass / molar mass (option C)

Molarity is defined as mole per unit volume as shown below:

Molarity = mole / volume

Make mole the subject by cross multiplying.

Mole = Molarity × volume (option H)

Thus, from the above illustrations, we can conclude that the correct options which will result in mole are option B, C, and H

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1. 5 moles

2. 75.6 grams

3. 2 moles

4.  1.806 x 10²⁴ particles

Given

mass and moles of compound

Required

mass, moles and number of particles

Solution

1. 530 g Na2CO3

mol = 530 g : 106 g/mol

mol = 5

2. 4.2 moles H2O

mass = 4.2 moles x 18 g/mol

mass = 75.6 grams

3. 12.04 x 10²³ O2

mol =   12.04 x 10²³ : 6.02  x 10²³

mol = 2

4. 3 moles of Mg

particles = 3 x 6.02  x 10²³

particles = 1.806 x 10²⁴

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products.

Endothermic reactions quickly and efficiently take up heat-based energy from their surroundings. In contrast, an exothermic process transfers energy into the system's surroundings. A common illustration of an endothermic chemical reaction is photosynthesis.

Chemists refer to the process of boiling water as being endothermic since heat must be added. It follows that since certain processes need heat, others must also produce heat as they operate. They are referred to as exothermic.

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The concept Avogadro's law is used here to determine the moles of gas present in the sample. Avogadro's law is also known as the Avogadro's principle or Avogadro's hypothesis. It is closely related to the ideal gas equation.

According to Avogadro's law, equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules. It follows that the volume of the gas is directly proportional to the number of molecules.

The equation is:

V₁n₁ = V₂n₂

n₂ = V₁n₁ / V₂

3.80 × 1.70 / 1.45 = 4.45

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Answer:

nebula

Explanation:

I am well informed

Organic transformation sequential equation using catalysts will be as follows:

2CH3-CH2-O => (alc. KOH) => CH2=CH2 + KCl + H2O => (Br2/CCl4) => CH2Br-CH2Br + Zn

CH2Br-CH2Br + Zn => (HBr /Pd) => CH2=CH2+ZnBr2

As can be visualized from above organic transformation equation, conversion of dry ether in presence of alkaline potassium hydroxide results in formation of unstable ethene. This dry unsaturated compound of ethene is stabilized by reaction that happens in presence of bromine or calcium tetrachloride as the catalyst which results in formation of ethylene bromide which in presence of highly efficient palladium as catalyst results in formation of stable ethene as byproduct. Thereby with formation of stable compound of ethylene, it releases zinc bromide as byproduct resulting completion of reaction equation. This stable product ethene is a double bonded carbon structure that is chemically extremely flammable and has planar structure.

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The ranking of boiling point is based on the molecular weight and intermolecular forces between molecules.

2 central carbons, each with CH3 bonded to them. A central C has H bonded left, above, behind to the right, and in front to the right. A carbon chain with 5 central carbons, with CH3 bonded to the first, second, and last carbons in the chain. 2 central carbons with CH3 bonded to the outside, and CH3 bonded to the leftmost inside carbon.

In this case, all compounds are hydrocarbons, meaning they are non-polar molecules and exhibit van der Waals forces. However, the length of the carbon chain and the arrangement of atoms in the molecule affect the magnitude of these forces.

The first compound has only two carbons and exhibits weak intermolecular forces, so it has the lowest boiling point. The second compound has three carbons and a more complex arrangement of atoms, resulting in slightly stronger van der Waals forces and a higher boiling point.

The third compound has a longer carbon chain, which increases the molecular weight and results in stronger intermolecular forces, giving it a higher boiling point than the previous two. The fourth compound has the longest carbon chain and has multiple branches, which increases the surface area of the molecule and the strength of the intermolecular forces, giving it the highest boiling point.

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Answer:

The answers are 4, 2, 3, 1

Explanation: