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Answer:

m = 673 g

Explanation:

We need to find the mass of 5.90 mol of \(C_8H_{18}\)

Molar mass of \(C_8H_{18}\) is:

\(M=8\times 12+1\times 18\\\\=114\ g/mol\)

Let m be the mass of 5.90 mol of \(C_8H_{18}\). Using mole concept to find it.

No of moles = mass/molar mass

\(m=5.9\times 114\\\\=672.6\ g\\\\\approx 673\ g\)

So, the required mass is 673 g. Hence, the correct option is (d).

Answer:

673 g

Explanation:

Answer:

Subconscious - psychic activity just below the level of awareness

Election - the act of electing someone

Explanation:

I hope this helped enough, good luck in chemistry!

Sodium (Na) and chlorine (Cl) are the largest dissolved components in ocean water due to the abundance of sodium and chloride ions in the Earth's crust and the continuous input of these elements into the oceans through various processes. Sodium is one of the most common elements in the Earth's crust, and chlorine is widely distributed in rocks, minerals, and salts.

Over millions of years, weathering of rocks, volcanic activity, and erosion release these elements into rivers and ultimately into the oceans. The combination of sodium and chlorine ions results in the formation of sodium chloride, which is commonly known as table salt and contributes to the salinity of seawater.

The most abundant dissolved gas in ocean water is carbon dioxide (CO2). Carbon dioxide dissolves in the surface waters of the ocean through gas exchange with the atmosphere. It plays a crucial role in regulating the pH of seawater and is an essential component of the carbon cycle. Carbon dioxide is involved in various biological and chemical processes in the ocean, including photosynthesis by marine plants and the formation of calcium carbonate shells by marine organisms. Additionally, the increase in atmospheric carbon dioxide due to human activities has led to ocean acidification, which is a significant concern for marine ecosystems.

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Due to the fact that they combine to form the ionic compound sodium chloride (NaCl), also known as salt, sodium (Na) and chlorine (Cl) are the two most abundant dissolved elements in ocean water.

Thus, Salts are among the many dissolved compounds that water from rivers and streams transports into the ocean.

In particular, sodium and chloride ions have accumulated in the ocean throughout time, leading to the high concentration of these elements in seawater. Magnesium, calcium, potassium, and sulphate ions are among the other dissolved substances in ocean water.

Oxygen  is the dissolved gas that is most prevalent in ocean water.

Thus, Due to the fact that they combine to form the ionic compound sodium chloride (NaCl), also known as salt, sodium (Na) and chlorine (Cl) are the two most abundant dissolved elements in ocean water.

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Answer:

20%

Explanation:

10.0 = 100%

8.00 = 80%

100-80= 20

Answer:

The water cycle is a series a of reversible changes. The sea water under the action of heat get vaporised which in turn changes into clouds. These clouds provide rain. The rain water then flows to the streams and rivers which eventually falls back to the oceans and seas.

The particle that makes the atom an unstable isotope is the neutron. When there is an excess or a deficiency of neutrons in an atom's nucleus, it becomes an unstable isotope.

Unstable isotopes are isotopes that decay and emit radiation until they reach a stable state. They are also known as radioactive isotopes. The radioactive isotopes are unstable and have an unpredictable lifespan because they have an unstable ratio of neutrons to protons. This excess of neutrons in the nucleus results in a greater electrostatic repulsion between protons, causing instability and eventually decay.Neutrons are the particles that are responsible for making atoms unstable isotopes. The excess or deficiency of neutrons in an atom's nucleus leads to an unstable state and eventually decay. Radioactive isotopes are important for various practical applications such as nuclear power, radiography, and cancer treatment.

Therefore, neutrons makes the atom an unstable isotope. The decay of unstable isotopes can be used for many practical applications such as nuclear power, radiography, and cancer treatment.

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The NSN test search is used to locate test reports that provide comprehensive information about the testing and evaluation of specific products or items.

The National Stock Number (NSN) test search is used to locate test reports on various products or items. Test reports provide detailed information about the testing and evaluation of a particular product's performance, quality, safety, or compliance with specific standards or requirements. These reports are often conducted by independent testing laboratories or organizations to assess the characteristics and capabilities of the product.

The NSN test search allows users to search for test reports based on the NSN, which is a unique identification number assigned to each item in the federal supply system. By inputting the NSN into the search, individuals or organizations can access relevant test reports associated with that specific item or product.

The test reports obtained through the NSN test search can be valuable for various purposes, such as quality assurance, product development, procurement decisions, or regulatory compliance. They provide important insights into the performance and reliability of the item being tested, allowing users to make informed decisions based on objective evaluation and testing data.

In summary, the NSN test search is used to locate test reports that provide comprehensive information about the testing and evaluation of specific products or items.

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The activation energy for this reaction is - 55.5 kJ/mol

Calculation,

Given data,

First temperature \(T_{1}\) =  302°C = 302+273 = 575 K

Second temperature \(T_{2}\) =  508°C =  508+273 = 781 K

rate constant at  302°C = 2. 45 × \(10^{-4}\) lit/mol s

rate constant at 508°C =  0. 0965 lit/mol s.

Value of universal gas constant = 8.3145 J/k mol.

Apply Arrhenius equation,

㏒\(K_{1} /K_{2}\) = \(E_{a}/2.203R\) [1/ 575 K - 1/781 K]

㏒2. 45×\(10^{-4}\) lit/mol s/0.0965 lit/mol s = \(E_{a}\) /2.303×8.3145 J/k mol[781-575/575K×781 K]

\(E_{a}\) = - 55.5 kJ/mol

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Molar mass of H_2SO_4

\(\\ \rm\hookrightarrow Mass=No\:of\:moles\times Molar\:mass\)

\(\\ \rm\hookrightarrow Mass=0.5(98)\)

\(\\ \rm\hookrightarrow Mass=49g\)

The maximum height above the point of release that the block reaches is approximately 11.32 meters.

To determine the maximum height above the point of release that the block reaches, we need to analyze the conservation of mechanical energy.

Given:

Mass of the block (m) = 0.243 kg

Force constant of the spring (k) = 4,950 N/m

Compression of the spring (x) = 0.104 m

Potential Energy of the Spring:

The potential energy stored in the compressed spring can be calculated using the formula:

Potential energy (PE) = (1/2) × k × x²

Substituting the given values:

PE = (1/2) × 4,950 N/m × (0.104 m)²

PE = 27.027 J (Joules)

Maximum Potential Energy at the Highest Point:

At the highest point, the block momentarily comes to rest, converting all its potential energy into gravitational potential energy.

Gravitational potential energy (GPE) = m × g × h

At the highest point, the velocity of the block is zero, so its kinetic energy is zero.

Substituting the known values:

GPE = m × g × h

27.027 J = 0.243 kg × 9.8 m/s² × h

27.027 J = 2.3886 kg·m²/s² × h

Simplifying the equation:

h = 27.027 J ÷ (2.3886 kg·m²/s²)

h ≈ 11.32 m

Therefore, the maximum height above the point of release that the block reaches is approximately 11.32 meters.

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Answer:

sp3.

.....................

It is important to use an appropriate instrument in measuring the distance of an object because it gives precise and exact measurements and also, it ensures that the measurement taken is accurate, consistent and reliable. (option A and C)

This is important because it helps people process data accurately. If measurements are not precise or exact, it can lead to errors in data analysis, research findings, and decision-making. Both A and C are correct as an appropriate instrument ensures that the data collected is precise, which leads to more accurate data analysis and decision-making. Hence, using an appropriate instrument is crucial to obtain accurate and reliable data. (options A and C)

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The elementary reaction equation H2O2(g) ⟶ H2O(g) + O(g) is given below. Order with respect to H2O2:The order of the reaction is the power of the concentration term in the rate law. The power of the concentration of H2O2 in the given equation is 1. Therefore, the order with respect to H2O2 is 1.

Overall order of the reaction: It is the sum of the powers of the concentration terms in the rate law. In this case, the sum of the power of the concentration of H2O2 and O is 1 + 1 = 2. Therefore, the overall order of the reaction is 2.Classification of the reaction:

The classification of a reaction depends on the number of molecules colliding to give products in a single step. The given equation has two molecules of H2O2 colliding to give products in a single step, and hence, it is a bimolecular reaction.

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Answer:

losses a single valence electron to the fluorine atom, which has just enough space to accept it.

- Lumen Learning

The substances that have Delta Hf = 0 kJ/mol are O2(g), Br2(l), He(g), Fe(s).

Delta Hf = 0 is the standard enthalpy of any element in its most stable form is equal to zero.

When enthalpy is negative, the delta Hf is minus zero, which means the system releases heat.

When the system gains heat, the delta Hf is positive.

Thus, the substances are O2(g),  Br2(l), He(g), Fe(s).

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Answer:

1,4,5,6

Explanation:

Surface-activated silicon wafers were bonded firmly and void-free by MMR Howlader from room temperature to annealing at 600 °C, followed by analysis of the interface's optical, electrical, mechanical, and nanostructure properties.

What is annealing?

In the fields of metallurgy and materials science, annealing is a heat treatment that modifies the physical and occasionally chemical properties of a material to enhance its ductility and decrease its hardness, making it more workable.

Annealing is a heat-treatment procedure that modifies a material's physical, and occasionally chemical, properties to improve ductility and decrease hardness to make it more workable.

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The new rock-like material is classified as a type of true mineral because It is not the naturally occurring substance.

The mineral can be described as the naturally occurring homogeneous solid with a definite chemical composition and an organized atomic arrangement, which is usually produced by the inorganic processes.

Mineral elements compose the earth, either alone or in several combinations called the compounds. A mineral can be defined as the inorganic element that exists naturally and has the particular chemical composition.

Minerals aren't even alive and are formed by the fitting the atoms that make up a mineral. While impurities may be present in the given kind of crystal, are the same for all the crystals. Some common minerals are gold, diamonds, rock salt, and  graphite, etc.

If a mineral is synthesized in  laboratory, it cannot be found in nature itself. That mineral can be classified as the true mineral.

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Answer:

I answered the 1 and 2 question.................

Explanation:

The third one is a link

The hydrocarbons, which include alkanes, alkenes, and alkynes, are nonpolar and insoluble in water because of their nonpolar covalent bonds. High melting points are not typically observed in hydrocarbons. Most hydrocarbons have low boiling points, which means they are volatile and tend to vaporize at room temperature.

Option A: High melting points are not typically observed in hydrocarbons. Hydrocarbons have weak intermolecular forces and low melting points due to nonpolar covalent bonds. As a result, hydrocarbons are commonly referred to as volatile compounds.

Option B: Poor solubility in water is due to hydrocarbons' nonpolar nature. Water, a polar solvent, cannot dissolve nonpolar substances like hydrocarbons. Polar substances dissolve in polar solvents, and nonpolar substances dissolve in nonpolar solvents.

Option C: Most hydrocarbons have low boiling points, which means they are volatile and tend to vaporize at room temperature.

Option D: Covalent bonding is a characteristic of hydrocarbons, which are made up of carbon and hydrogen atoms.

High melting points are not typically observed in hydrocarbons. Option A is the correct answer.

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Answer: D: You will have excess gas for this reaction

Explanation: I just took the test

Answer:

Elements are arranged from left to right and top to bottom in order of  increasing atomic number. As, The modern periodic law tells that the Elements in the modern periodic table are arranged by increasing atomic numbers.

Answer:

See below ~

Explanation:

Properties used to arrange elements

The gas in the tank has a final temperature of roughly 480.5 K.

Gas molecules interacting with an object's surface generate force, which is what creates gas pressure. Although though there is very little force involved in each impact, any surface with a sizeable area is subject to many of them quickly, which can lead to a high pressure.

As per the ideal gas law,

PV = nRT

We can write: Provided that the volume and quantity of moles of gas remain constant.

P1/T1 = P2/T2

where the initial pressure and temperature are P1 and T1, and the ultimate pressure and temperature are P2 and T2.

With the values provided, we have:

P1 = 7.571 atm

T1 = 283.2 K

P2 = 12.846 atm

We can solve for T2:

T2 = (P2/P1) * T1

= (12.846 atm / 7.571 atm) * 283.2 K

= 480.5 K

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Answer:

Proteins have different functions within living beings: Cellular transport. Structure of hair, muscle, nails, cell components and cell membranes. Biological catalysts or enzymes.

Explanation:

I hope this answer has helped you

Answer:

The answer is that 2-ethyl-3-oxo hexanal gets reduced in this experiment. This is because reduction involves the gain of electrons, and in this experiment, 2-ethyl-3-oxo hexanal is being reduced to 2-ethyl-1,3-hexanediol.

Reduction is a chemical reaction that involves the gain of electrons. In this experiment, we can see that 2-ethyl-3-oxo hexanal is being reduced to 2-ethyl-1,3-hexanediol. This means that 2-ethyl-3-oxo hexanal is losing electrons and becoming more positively charged, while 2-ethyl-1,3-hexanediol is gaining electrons and becoming more negatively charged. The other species listed, acetic acid and hypochlorous acid, are not directly involved in the reduction reaction and do not get reduced themselves.

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Answer:

You can view more details on each measurement unit: molecular weight of Potassium or grams The molecular formula for Potassium is K. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium, or 39.0983 grams.

Explanation:

Based on the given information, the structure for the compound C10H13NO2 can be drawn as follows:

     H        H
      |        |
H - C - C - C - C - C - C - C - C - C - N - C - O - O - H
    |     |    |    |     |    |
    H     H    H    H     H    H

This structure represents a molecule with a carbon chain of 10 carbons, attached to a nitrogen atom and a carboxyl group (COOH).

The IR spectrum indicates the presence of N-H (3285 cm-1), C=O (1659 cm-1), and C-N (1246 cm-1) bonds.

The 1H NMR spectrum shows several peaks, including a triplet at 1.4 ppm (3H, J = 7 Hz), a large singlet at 2.01 ppm (3H), a quartet at 4.0 ppm (2H, J = 7 Hz), two doublets at 6.8 and 7.38 ppm (2H each, J = 9 Hz), and a weak singlet at 7.6 ppm (1H).

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Increasing the pressure or decreasing the volume of the system would increase the molar concentration at equilibrium of the product N₂O₄(g).

According to Le Chatelier's principle, if a change is applied to a system at equilibrium, the system will shift in a way that partially offsets the change. In this case, increasing the pressure or decreasing the volume of the system would cause the system to shift towards the side with fewer moles of gas to reduce the overall pressure. The reaction 2NO₂(g) ⇌ N₂O₄(g) involves a decrease in the number of moles of gas, as two molecules of NO₂ combine to form one molecule of N₂O₄.

Therefore, by increasing the pressure or decreasing the volume, the equilibrium will shift towards the product side, resulting in an increase in the molar concentration of N₂O₄(g) at equilibrium. This change can be achieved by, for example, reducing the volume of the container or increasing the total pressure by adding an inert gas or increasing the number of moles of reactants.

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ANSWER

Option C

EXPLANATION

Given that;

In the reaction above, we have the following data

At the reactants side;

3 atoms of manganese

4 atoms of nitrogen

1 atom of sodium

1 atom of fluorine

At the products side

1 atom of manganese

4 atoms of fluorine

3 atoms of sodium

1 atom of nitrogen

To balance the above equation, apply the law of conservation mass

Law of conservation of mass states that matter can neither be created nor destroyed but can e transformed from one formato another.

To balance the equation, 1 mole of Mn3N4 reacts with 12 moles of Na Tto give 3 moles of MnF4 and 4 moles of Na3N

So, the new equation becomes

The following data can be deduced in the above equation

At the reactants side

3 atoms of Mn

4 atoms of N

12 atoms of Na

12 atoms of F

At the products side

3 atoms of Mn

12 atoms of F

12 atoms of Na

4 atoms of N

Looking atthe vabove data, the number of atoms of each element at the reactants side is equal to the number of atoms of same elements at the products side.

Hence, the correct answer is option Ce

u

Answer:

Caesium atoms will form positively charged ions.

Explanation:

Due to them having one electron in their outer orbit, it is very likely that they will give that electron away to form an octet and become stable. Hence, since they lose an electron, they lose a negative charge, and in comparison to their former non-ion self, they have gained a positive charge.

Hence, they will form positively charged ions.

Hope this helped!

Answer:

Because Lucy is not in motion causing her to have potential energy instead of kinetic.