help with this question please i will mark you brainliest!!!

Answer:

beryllium, magnesium, calcium, strontium, barium, radium

Explanation:

glad to help

The correct answer is Oe. Thermal capacitance, with respect to a tank process, is defined as the product of the mass of the tank wall and the specific heat capacity of the material of the tank wall.

Thermal capacitance refers to the ability of a system or object to store thermal energy. In the context of a tank process, the tank wall plays a significant role in storing and releasing heat. The thermal capacitance of the tank is determined by the mass of the tank wall and the specific heat capacity of the material composing the tank wall.

The greater the mass of the tank wall and the higher the specific heat capacity of the material, the higher the thermal capacitance of the tank.

Thermal capacitance refers to the ability of a system or object to store thermal energy. In the case of a tank process, the thermal capacitance is determined by the tank wall's characteristics.

The tank wall acts as a barrier between the contents of the tank and the surrounding environment. When the tank is subjected to heating or cooling, the tank wall absorbs and stores thermal energy. This stored energy helps maintain the temperature of the tank's contents.

The thermal capacitance of the tank is calculated by multiplying the mass of the tank wall by the specific heat capacity of the material composing the tank wall. The mass represents the amount of material present in the tank wall, while the specific heat capacity indicates the amount of heat energy required to raise the temperature of the material.

By understanding the thermal capacitance of the tank, engineers can determine how much heat energy is needed to raise or lower the temperature of the tank's contents and how long it will take for the tank to reach a desired temperature. This knowledge is crucial for designing and optimizing tank processes in various industries, such as chemical processing, food production, and energy storage.

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Answer:

influence of a business invironment

Answer Scientist

Explanation:

The pentose phosphate pathway (PPP) is a metabolic pathway that generates NADPH and ribose 5-phosphate (R5P) in mammalian cells. The pathway provides cells with the products they need for biosynthesis, such as nucleic acids, amino acids, and fatty acids.

This pathway is essential for the cell's anabolic processes and is involved in redox homeostasis. It is primarily regulated by the cell's energy requirements. If there is a greater need for NADPH, the PPP flux will increase, and if there is a greater need for R5P, the flux will decrease. When the need for R5P is greater than the need for NADPH, most of the ribulose 5-phosphate is converted into fructose 6-phosphate.

This reaction is catalyzed by the enzyme phosphopentose isomerase, which converts ribulose 5-phosphate to ribose 5-phosphate and then to fructose 6-phosphate. This conversion is irreversible, and the process is known as the oxidative phase of the PPP.

Overall, the pentose phosphate pathway is a crucial metabolic pathway for maintaining redox balance and providing cells with the biosynthetic products they require.

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Solid waste can be disposed by open dumping, landfill and incineration. Here, Incineration system is one of the methods of disposing solid waste. The system utilizes combustion processes to convert solid waste into ash and gases where the ash is later taken to the landfill.

Incineration is considered as a technology for ex situ thermal treatment which is based on the application of high temperature (870–1200 °C) to soil for burning harmful organic chemicals. Metals cannot be destroyed by using this technique. The efficiency of a properly operated incinerator is very high, especially for PCBs and dioxins. Incineration differs from the thermal desorption system in that incineration needs higher temperatures to chemically oxidize or decompose the contaminants, whereas the second method only volatilizes them.

The Advantages of incineration system of solid waste disposal includes:

1. Reduction in the volume of waste ,Incineration reduces the volume of waste to 10% to 20% of its original size.

2. Generation of electricity Incineration plants generate electricity by harnessing the heat energy that is generated by burning solid waste.

The Disadvantages of incineration system of solid waste disposal includes:

1. Production of toxic fumes Incineration of certain materials can lead to the production of toxic fumes such as dioxins.

2.  The installation of incineration plants is quite expensive. The plants require regular maintenance to remain in good working condition. For this reason municipalities and cities that have to bear the cost.

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Answer:

N2O is an empirical formula

Explanation:

A.) P4O10   NO:  Can be reduced to P2O5

B.) C2H4    NO:  Can be reduced to CH2

C.) H2O2     NO:  Can be reduced to H O

D.) N2O     YES, the formula cannot be reduced any further.

Answer:

centrioles

Explanation:

i learned this a few yrs back. hope it helps! :)

Answer:

it's answer is 24 yards

hope it helps you friend

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Answer:

If you were to divide any object into small pieces of unit volume, the density would be the mass of each small piece. Everything is made up of molecules, which in turn are made up of atoms. So every object is created from the aggregation of atoms and molecules.

:)

Answer:

No Specific question

Explanation:

Answer:

A: heating solid

B: melting

C: heating liquid

D: boiling

E: heating gas

F: melting point

Explanation: got it right

Answer:

1.36 Myr or 717 kyr.

Explanation:

Answer:

Half life of quartzs means natural decay of radioactive material.

Explanation:

Answer:

uhm

Explanation:

Structural and Organic Formula of Acetone: Acetone Formula (C3H6O) (Propanone) So, Both propanal and propanone are isomers of the substance having the chemical formula C 3 H 6 O.

A substance in science that is created through the chemical joining of two or more distinct elements Table salt (NaCl), which is derived from the elements sodium and chloride, and water (H2O), which is created from the elements hydrogen and oxygen, are two examples of compounds.

Because water molecules make up its composition, water is a compound. Atoms made of water don't exist. Hydrogen and oxygen atoms are found in a certain ratio of two hydrogen atoms to one oxygen in the structure of water molecules.

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The Correct option is :

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The particles diffuse from the region of higher concentration to the region of lower concentration.

for example :

during Inhalation, oxygen is in higher concentration in our lungs but in lower concentration blood capillaries, so oxygen diffuses into the blood and carbon dioxide which is in higher concentration in blood diffuses out from the blood capillaries.

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The ratio of hydronium ion concentration in the effluent to the hydronium ion concentration in the river is  100.

Hydronium is the not-unusual call for the aqueous cation H₃O⁺, the type of oxonium ion produced with the aid of protonation of water. it is frequently viewed because of the advantageous ion gift when an Arrhenius acid is dissolved in water, as Arrhenius acid molecules in solution surrender a proton to the encompassing water molecules.

Calculation:-

pH of water = 6

concentration =  1 × 10 ⁻⁴

PH of food processing plant = 4

concentration = 1 × 10 ⁻⁴

The ratio of hydronium ion concentration =  1 × 10 ⁻⁴/ 1 × 10 ⁻⁶

                                                                     = 100.

Its chemical formulation is H3O+. it is able to also be fashioned via the combination of an H+ ion with an H2O molecule. The hydronium ion has a trigonal pyramidal geometry and consists of three hydrogen atoms and one oxygen atom.

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Answer:

Option C

Explanation:

In Lewis dot structure the valence electrons are represented as dots around the symbol.

For example,

In hydrogen valence electron is only one it can be represented as,

H·

We know that in covalent bonding atoms share their electron to complete the octet. Thus, their Lewis dot structure would be represented as,

H:H

This is the Lewis dot structure of H₂.

In given atom X their are  2 valence electrons (3s²) thus its Lewis dot structure contain two dots around the symbol.

Option C is correct answer because it has only two dots which actually represent valence electrons.

Other options are incorrect because symbol X has more than two electrons/dots.

The percent yield in this reaction is 46.3%, which means that only 46.3% of the expected amount of AlCl3 was produced.

To balance the equation, we need to make sure there is an equal number of atoms on both sides.
Al(OH)3 (s) + 3HCl (aq) → AlCl3 (aq) + 3H2O (l)
Now, to calculate the percent yield, we need to use the formula:
Percent Yield = (Actual Yield / Theoretical Yield) x 100
The theoretical yield is the amount of product that should be produced based on the amount of reactant used. We can find the theoretical yield by using stoichiometry and the balanced equation.
From the equation, we can see that 1 mole of Al(OH)3 produces 1 mole of AlCl3. To convert grams of Al(OH)3 to moles, we need to divide by its molar mass (78.0 g/mol):
50.3 g Al(OH)3 / 78.0 g/mol = 0.644 moles Al(OH)3
Therefore, the theoretical yield of AlCl3 is also 0.644 moles.
To convert moles of AlCl3 to grams, we need to multiply by its molar mass (133.3 g/mol):
0.644 moles AlCl3 x 133.3 g/mol = 85.3 g AlCl3
This is the theoretical yield. Now we can calculate the percent yield:
Percent Yield = (Actual Yield / Theoretical Yield) x 100
Percent Yield = (39.5 g / 85.3 g) x 100
Percent Yield = 46.3%

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A recurrence relation for an is an equation that expresses the nth term of a sequence in terms of previous terms.

A recurrence relation provides a way to define the terms of a sequence recursively. It allows us to calculate each term based on one or more previous terms in the sequence.

To identify a recurrence relation for an, we need to find a pattern or relationship between consecutive terms. This can be done by examining the given sequence or problem statement.

For example, let's say we have a sequence {a1, a2, a3, a4, ...} and we notice that each term is the sum of the two previous terms: an = an-1 + an-2. In this case, we have identified a recurrence relation for the sequence.

The recurrence relation expresses the nth term, an, in terms of the previous terms an-1 and an-2. By knowing the initial terms of the sequence (a1, a2), we can use the recurrence relation to find any term in the sequence.

It is important to note that there can be different recurrence relations for the same sequence, depending on the pattern or relationship observed. The recurrence relation should capture the defining characteristic or rule of the sequence.

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Answer:

2,3–dimethylpentane

Explanation:

To know which option is correct, we shall determine the name of the compound.

To obtain the name of the compound, do the following:

1. Determine the longest continuous carbon chain. This gives the parent name of the compound.

2. Identify the substituent group attached to the compound.

3. Locate the position of the substituent group by giving it the lowest possible count.

4. Combine the above to obtain the name of the compound.

Now, we shall determine the name of the compound as follow:

1. The longest continuous carbon chain is 5. Thus, the parent name of the compound is pentane.

2. The substituent group attached is methyl (–CH₃)

3. There are two methyl group attached to the compound. One is located at carbon 2 and the other at carbon 3.

4. Therefore, the name of the compound is:

2,3–dimethylpentane

None of the options are correct.

Answer:

2.016E24 same as 2.016 × 10^24

Explanation:

we have to use 2 conversion facts

22.4 and 6.02E23

1. Convert to moles of NH3 from liters of NH3

75.0 ÷ 22.4 = 3.348 moles of NH3

2. Convert to molecules of NH3 from moles of NH3

3.348 × 6.02E23 = 2.016E24 molecules of NH3

please let me know if i need to further eloborate :)

Answer:

d

Explanation:

To apply the concept of partial pressure, Dalton's law of partial pressures. Dalton's law states that mixture of non-reacting gases, the total pressure is equal the sum of partial pressures.

The partial pressure of a gas can be calculated by multiplying its mole fraction in the mixture by the total pressure.

First, we need to find the mole fractions of CH4 and Xe in the mixture. To do this, we calculate the moles of each gas by dividing their masses by their respective molar masses.

Molar mass of CH4 (methane) = 12.01 g/mol + 4(1.01 g/mol) = 16.05 g/mol

Moles of CH4 = 8.0 g / 16.05 g/mol = 0.498 mol

Molar mass of Xe (xenon) = 131.29 g/mol

Moles of Xe = 8.0 g / 131.29 g/mol = 0.061 mol

Next, we calculate the total moles of gas in the mixture:

Total moles = moles of CH4 + moles of Xe = 0.498 mol + 0.061 mol = 0.559 mol, Now we can calculate the mole fractions:

Mole fraction of CH4 = moles of CH4 / total moles = 0.498 mol / 0.559 mol = 0.89

Mole fraction of Xe = moles of Xe / total moles = 0.061 mol / 0.559 mol = 0.11.

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Option (1) represents the Lewis electron-dot diagram correctly containing nitrogen in the equation.

Lewis Structure is a very simplified representation of the valence shell electrons in a molecule.  It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.

Valence electrons are given by hydrogen atoms = \(1\times3=3\)

Valence electrons are given by nitrogen atom = \(5\times1=5\)

Total valence electrons = 3 + 5 = 8

So, the calculation above is shown only the first option. So, (1) Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation.

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Answer:

The control variable in a comparison of cleaning teeth with baking soda and toothpaste would be the toothbrush used, as it is the constant factor in both conditions. The toothbrush should remain the same in both experiments to ensure that any observed differences in cleaning effectiveness are due to the baking soda or toothpaste and not the toothbrush.

The conjugate base of an acid does not always carry a negative charge. To understand this, let us first define the terms 'acid' and 'conjugate base'.An acid is a substance that releases H+ ions when dissolved in water.

An example of an acid is hydrochloric acid (HCl) which releases H+ ions and chloride ions (Cl-) when dissolved in water. HCl + H2O → H3O+ + Cl-.A conjugate base is the substance that is formed when an acid loses a proton (H+ ion). It can be formed from any acid, whether it is weak or strong. The conjugate base of an acid is the species that remains after an acid has donated a proton to another species. In the case of HCl, Cl- is the conjugate base, and it carries a negative charge because it has gained an electron and has a greater number of electrons than protons.Conversely, the conjugate base of a weak acid may not carry a negative charge. For example, the conjugate base of acetic acid (CH3COOH) is acetate ion (CH3COO-) which does not carry a negative charge. Acetate ion has a greater number of electrons than protons, but its net charge is zero. Thus, the conjugate base of an acid does not always carry a negative charge.

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The melting point of tin is approximately 231.93 degrees Celsius or 449.47 degrees Fahrenheit. This means that when tin reaches this temperature, it becomes a liquid.

Melting of a substance happens when temperature it's at makes it change it's state from solid to liquid. For tin, this temperature would be 231.93 degrees Celsius or 449.47 degrees Fahrenheit. When tin is heated to this temperature, the forces holding its inner particles weaken, allowing it to transform from a solid tin to a liquid state

It is important to note that the temperature may vary slightly depending on the purity of the tin and other factors.

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Answer:

the atomic number of the element with 77 as atomic weight and 55 neutrons is 22