Combustion engines that power vehicles indirectly give rise to which gas that is beneficial in the atmosphere, but also harmful in the troposphere? Select one: a. N2O, nitrous oxide b. CFC, chlorofluorocarbon c. O3, ozone d. CO, carbon dioxide

The quantity of heat released in kJ when 15.7 g of benzene in the liquid phase at 50.0 °C is converted to solid benzene at 2.0 °C is 3.32 kJ.

The quantity of heat released is calculated using the formula below:

The following values apply to benzene:

Moles of benzene = 15.7/78/11 = 0.20 moles

Heat evolved from 50 °C to 5.4 °C = 15.7 * 1.8 * (50 - 5.4) = 1260.4 J = 1.26 kJ

Latent heat of fusion = 0.2 * 9.9 = 1.98 kJ

Heat evolved on cooling from 5.4 °C to 2.0 °C = 15.7 * 1.51 * (5.4 - 2.0) = 80.6  J = 0.08 kJ

quantity of heat released = 1.26 + 1.98 + 0.08 = 3.32 kJ

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Answer: Malleability

Explanation: Is because metals have mobile electrons in their s orbitals.

Hope this helps..

Answer:

The answer to this question is mobile electrons in s orbitals.

The answer to the following question on edg is directional electrons in p orbitals.

Explanation:

Answer: The answer is False

Explanation: They can be the same element yet have different numbers of neutrons i'm pretty sure they are called isotopes

Answer:

It is B. Budding

Explanation:

Hope this helped have an amazing day!

Answer:

try use Google search

Explanation:

you need to use it

The formula for the compound formed between Ca and Te is CaTe₂.

The formula for the compound formed between Ba and Cl is BaCl₂.

Lewis theory, also known as the Lewis electron dot structure or Lewis structure, is a model used to represent the bonding and electron distribution in molecules and ions. It was given by chemist Gilbert N. Lewis.

According to Lewis theory, atoms in a molecule are represented by their atomic symbols, and valence electrons are represented as dots around the atomic symbols. The valence electrons are the outermost electrons which is involved in chemical bonding.

PART A:

According to Lewis theory, calcium (Ca) has two valence electrons and tellurium (Te) has six valence electrons. To form a stable compound, they need to share or transfer electrons.

Ca (2 valence electrons) + Te (6 valence electrons)

Since calcium needs to lose two electrons to achieve a stable octet and tellurium needs to gain two electrons to achieve a stable octet, they can form an ionic compound with a 2:2 ratio of Ca to Te.

The formula for the compound formed between Ca and Te is CaTe₂.

PART B:

Barium (Ba) has two valence electrons, and chlorine (Cl) has seven valence electrons. Again, according to Lewis theory, they will either share or transfer electrons to achieve stability.

Ba (2 valence electrons) + Cl (7 valence electrons)

Barium can lose two electrons to achieve a stable octet, and chlorine needs to gain one electron to achieve a stable octet. They can form an ionic compound with a 1:2 ratio of Ba to Cl.

The formula for the compound formed between Ba and Cl is BaCl₂.

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Answer:

D. The flesh should return to normal after you press it.

Explanation:

The water content stored in the flesh of the fish, paired with the elasticity are both indicators of freshness, and will cause the flesh to return to normal after its been pressed.

Answer

b. It produces carbon dioxide when burned in pure oxygen.

Explanation

The reaction between diamond and oxygen, producing carbon dioxide is not a physical property of diamond, it is a chemical property because breaking and synthesis of chemical bonds occur.

To calculate the mass of silicon dioxide needed, we need to use its molar mass and the given number of moles.

The molar mass of silicon dioxide (SiO2) can be calculated by adding the atomic masses of silicon (Si) and two oxygen (O) atoms:

Molar mass of Si = 28.09 g/mol

Molar mass of O = 16.00 g/mol

Molar mass of SiO2 = (28.09 g/mol) + 2(16.00 g/mol) = 60.09 g/mol

Now, we can calculate the mass of silicon dioxide needed:

Mass = Number of moles × Molar mass

Mass = 3.002 mol × 60.09 g/mol

Mass ≈ 180.3 g

Therefore, the student should obtain approximately 180.3 grams of silicon dioxide for the experiment.

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A 0.425g sample of propane was mixed with excess oxygen in a calorimeter containing 98.72 g of water. The system was ignited and the temperature rose from 18.29ºC to 26.85ºC.  the molar enthalpy of propane is 393851.1 J/mol

The mass of propane = 0.425 g

molar mass of propane = 44 g/mol

moles = mass / molar mass

         = 0.425 / 44

         = 0.009 mol

ΔH = mc ΔT

ΔH  = n ΔHsol

ΔHsol = mc ΔT / n

          = 98.72 × 4.18 ( 26.85 - 18.29 ) / 0.009

molar enthalpy of solution = 393851.1 J/mol

Thus, A 0.425g sample of propane was mixed with excess oxygen in a calorimeter containing 98.72 g of water. The system was ignited and the temperature rose from 18.29ºC to 26.85ºC.  the molar enthalpy of propane is 393851.1 J/mol

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Answer:

hydrochloric acid

Explanation:

These anions usually have the ending “-ide.” As acids, these compounds are named starting with the prefix “hydro-,” then adding the first syllable of the anion, then the suffix “-ic.” For example, HCl, which is hydrogen and chlorine, is called hydrochloric acid. More complex acids have oxygen in the compound.

Answer:

Nucleic acids determine the types of protein synthesis synthesized within cells.

What are nucleic acids synthesized by?

Viral nucleic acid synthesis is catalyzed by both viral and host enzymes, the relative contribution of which is determined by the type of virus and the specific molecule. Viruses with RNA genomes, except for the retroviruses, synthesize mRNA and replicate their genomes using virus-encoded RNA-dependent RNA polymerases.

See an example below:

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Nucleic acids determine the types of proteins synthesized within cells.

In a cell, nucleic acids such as DNA and RNA play crucial roles in storing and transmitting genetic information. This genetic information serves as instructions for producing proteins, which are essential for numerous cellular processes and functions.

The process of protein synthesis begins with the transcription of DNA into RNA, specifically messenger RNA (mRNA). The mRNA then carries this genetic information from the cell nucleus to the ribosomes in the cytoplasm. At the ribosomes, the mRNA's genetic code is translated into a sequence of amino acids, which are the building blocks of proteins. This process is called translation.

The specific order of amino acids in a protein determines its structure and function. Since the genetic information in nucleic acids dictates the amino acid sequences in proteins, nucleic acids are responsible for determining the types of proteins synthesized within cells.

In summary, nucleic acids are essential for the storage and transmission of genetic information that determines the types of proteins synthesized in cells. These proteins play vital roles in cellular structure, function, and regulation, contributing to the overall health and maintenance of an organism.

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The mass percent (m/m) of glucose in a solution that contains 30.0 g of water and 5.8 g of glucose is 16.2%.

Thus, the correct option is A.

Mass percent is a term used to describe the concentration of a solution. It is defined as the mass of the solute in grams divided by the total mass of the solution in grams, multiplied by 100 percent.

To find the mass percent of glucose in the given solution, we need to calculate the total mass of the solution. The total mass of the solution is given by the sum of the mass of glucose and water:

30.0 g (water) + 5.8 g (glucose) = 35.8 g (total mass of solution)

The mass percent of glucose in the solution is then calculated as follows:

Mass percent (m/m) = (mass of glucose ÷ total mass of solution) × 100 percent

= (5.8 ÷ 35.8) × 100 percent= 16.2 percent

Therefore, the mass percent (m/m) of glucose in the solution is 16.2%.

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The total mass of the protons is 1.338 * 10^-23 g

A proton is the positively charged particle in an atom. It is found in the nucleus along with the neutrons and are collectively called the nucleons.

The hydrogen atom has only one proton while the nitrogen atom has seven protons. Thus makes a total of eight protons in the ammonia molecule.

Hence, the total mass of protons in the ammonia molecule =

8 ( 1.673 × 10^-24 g) = 1.338 * 10^-23 g

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When utilizing the gravimetric method, it is crucial to completely dissolve your sample in 10 mL of water. A quantitative technique called gravimetric analysis employs the selective precipitation of the component under study from an aqueous solution.

A group of techniques known as gravimetric analysis are employed in analytical chemistry to quantify an analyte based on its mass. Gravimetric analysis is a quantitative chemical analysis technique that transforms the desired ingredient into a substance (of known composition) that can be extracted from the sample and weighed. This is a crucial point to remember.

Gravimetric water content (g) is therefore defined as the mass of water per mass of dry soil. To calculate it, weigh a sample of wet soil, dry it to remove the water, and then weigh the dried soil (mdry). Dimensions of the sample Water is commonly forgotten despite having a density close to one.

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To determine the concentration of citric acid in a soda, we can use the concept of acid-base titration.

In this case, we are given the volume and concentration of the sodium hydroxide (NaOH) solution used to titrate a known volume of soda. Using this information, we can calculate the concentration of citric acid in the soda. The balanced chemical equation for the reaction between citric acid and sodium hydroxide is: 3 NaOH + H3C6H5O7 → Na3C6H5O7 + 3 H2O. From the balanced equation, we can see that 3 moles of NaOH react with 1 mole of citric acid (H3C6H5O7). Therefore, the number of moles of citric acid in the soda is: moles of citric acid = (moles of NaOH) / 3, moles of NaOH = concentration of NaOH x volume of NaOH used, moles of NaOH = 0.0148 M x 32.27 mL = 0.4757 mmol, moles of citric acid = 0.4757 mmol / 3 = 0.1586 mmol. Next, we can calculate the concentration of citric acid in the soda using the equation: concentration of citric acid = moles of citric acid / volume of soda used, concentration of citric acid = 0.1586 mmol / 25.00 mL = 0.006344 M. Therefore, the concentration of citric acid in the soda is 0.006344 M or 6.344 mM.

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The major organic product obtained from the following sequence of reactions is option b. 2 OCH3.

Explanation:
The sequence of reactions is as follows:
1. The first step is the reaction of OH with OCH3 to form Loom 2 OCH.
2. The next step is the reaction of Loom 2 OCH with CH3ONa to form CH3OH and OCH.
3. The final step is the reaction of CH3OH and OCH with OCH to form the final product, 2 OCH3.
Therefore, the major organic product obtained from the sequence of reactions is 2 OCH3, which is option b.
I hope this helps! Let me know if you have any further questions.

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When 1.00 g of aluminum reacts with excess potassium hydroxide solution, how many grams of hydrogen are released assuming a 100% yield? What is aluminum? Aluminum is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic, and ductile metal in the boron group.

Its atomic mass is 26.98, and it is the third-most abundant element, after oxygen and silicon. Potassium hydroxide is an inorganic compound with the formula KOH, commonly known as caustic potash. It is a strong base, and its chemical properties are similar to those of sodium hydroxide, the more well-known caustic soda.1.00 g of aluminum reacts with potassium hydroxide solution as follows:2Al + 2KOH + 6H2O → 2KAl(OH)4 + 3H2From the balanced chemical reaction above, two moles of aluminum react with two moles of potassium hydroxide and six moles of water to produce two moles of potassium tetrahydroxy aluminate and three moles of hydrogen. Therefore, one mole of aluminum reacts with one mole of potassium hydroxide and three moles of water to produce one mole of potassium tetrahydroxy aluminate and 1.5 moles of hydrogen. Using the periodic table, we can determine the molar mass of aluminum to be 26.98 g/mol. Therefore, one mole of aluminum weighs 26.98 g. Using the balanced equation, we can see that one mole of aluminum produces 1.5 moles of hydrogen. Since one mole of hydrogen weighs 1.008 g, we can determine the mass of hydrogen released by 1.00 g of aluminum by using the following formula: Mass of hydrogen = Number of moles of hydrogen × Molar mass of hydrogen Mass of hydrogen = 1.5 × 1.008Mass of hydrogen = 1.51 g Therefore, 1.51 g of hydrogen are released by the reaction of 1.00 g of aluminum with excess potassium hydroxide solution assuming 100% yield. Answer: 1.51 grams

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Answer:

Explanation:

The notations for electronic structure of the atom is based upon the application of quantum numbers which specifies the order of filling of atomic orbitals by electrons. There are 4 quantum numbers that include...

Principle QN (n) => specifies location of electron as to major energy level or, ring about the atom of interest.

Orbital QN (l) => specifies the shape of the orbital containing the electron

   s => sphere => holds 2 electrons

   p => figure eight => holds up to 6 electrons

   d => overlapping figure eights => holds up to 10 electrons

   f => multiple overlapping figure eights => holds up to 14 electrons

The order of filling follows the Aufbau Principle that electrons enter the atomic orbital with the lowest available energy content. This order of filling from low energy to higher energies follows the Aufbau Diagram.

This order theoretically can go to infinity, but the scientific community only knows of 7 major energy levels; i.e., the 7 rows of the periodic table. See attached Aufbau diagram and follow the arrows in order from low energy to high energy. Use superscripts for number of electrons equal to atomic number of element of interest.  

H: 1s¹

O: 1s²2s²2p⁴

Al: 1s²2s²2p⁶3s²3p³

Ag: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁹

Answer:

159.808 g/mol

Answer:

159.80 g/mol

Explanation:

79.90×2=159.80g/mol

Answer:

ohh... it's time vs air that's all

The exponential function is always positive, we can conclude that there is no solution to this equation. This implies that the given data is not consistent with a first-order system.

The transfer function of a system describes the relationship between the input and output signals of the system in the frequency domain. However, the boiling process itself does not have a standard transfer function because it is a complex and dynamic phenomenon influenced by various factors such as temperature, pressure, fluid properties, and heat transfer mechanisms.

To derive the transfer function of the boiling process, we need to understand the dynamics of the system. In this case, we have a first-order system where the water in a beaker is heated from a temperature of 20 °C to the boiling point of 100 °C. The time taken for the temperature to reach 100 °C is given as 120 seconds.
To begin, let's define the input and output variables of the system. The input variable is the heating power or energy applied to the beaker, and the output variable is the temperature of the water.
The transfer function is a mathematical representation of the relationship between the input and output of a system. In this case, the transfer function describes how the temperature of the water changes in response to the heating power.
Let's assume the transfer function is represented as G(s), where s is the complex frequency variable.
To derive the transfer function, we can use the time-domain response data provided. The first-order system response to a step input can be described by the following equation:
y(t) = K(1 - e^(-t/τ))
where y(t) is the output (temperature of the water), K is the steady-state gain, t is time, and τ is the time constant.
Given that the temperature reaches 100 °C after 120 seconds, we can substitute the values into the equation:
100 = K(1 - e^(-120/τ))
Simplifying the equation, we have:
1 - e^(-120/τ) = 100/K
Now, let's consider the initial condition where the water temperature is 20 °C at t = 0. Plugging these values into the equation, we have:
20 = K(1 - e^(-0/τ))
20 = K
Substituting this value of K into the previous equation, we get:
1 - e^(-120/τ) = 100/20
1 - e^(-120/τ) = 5
Now, let's solve for τ. Rearranging the equation, we have:
e^(-120/τ) = 1 - 5
e^(-120/τ) = -4
In summary, based on the provided information, it is not possible to derive the transfer function of the boiling process as a first-order system. Further information or clarification is needed to accurately determine the transfer function.

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Answer:

See attached image.

Explanation:

Answer

The mass (in grams) of oxygen present = 1.79 grams.

Explanation

Given

Volume, V = 3.0 L

Temperature, T = 34 °C = (34 + 273.15 K) = 307.15 K

Pressure, P = 0.472 atm

What to find:

The mass (in grams) of oxygen present.

Step-by-step solution:

Step 1: Calculate the moles of oxygen present.

Using the ideal gas law:

R is the molar gas constant = 0.0820574 L•atm/mol•K.

The moles of oxygen present is 0.056 mol.

Step 2: Convert 0.056 mol oxygen to mass in grams.

The molar mass of oxygen gas = 31.998 g/mol

Using the mole formula below, the mass of oxygen can be calculated as follows:

The mass (in grams) of oxygen present = 1.79 grams.

The answer is 67 108.0888km/s.

A compound containing iron and sulfur was formed by combining 2.233 g of iron with 1.926 g of sulfur. Fe\(_2\)S\(_3\) is the empirical formula of the compound.

While the molecular formula provides the precise number of each unique atom present in a molecule, the empirical formula for a compound provides the simplest ratio for the total amount of different atoms present. It constitutes an empirical formula if it has been simplified. The empirical formula is multiplied by the widely used molecular formula.

number of moles of sulfur =  1.926/ 32=0.06

moles of iron = 2.233/56=0.04

the simplest atomic ratio of the sulfur and iron atoms

S=0.06/0.04=1.5

Fe = 0.04/0.04=1

the whole number atomic ratio

S=1.5×2=3

Fe=1×2=2

empirical formula is Fe\(_2\)S\(_3\).

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