particulates can be removed from smokestack emissions by which of the following methods? responses irradiation by uv light irradiation by uv light electrostatic precipitators electrostatic precipitators catalytic converters catalytic converters liquid chromatography liquid chromatography exhaust-stream aeration

Answer:

they are all true

Explanation:

Answer:

Every map is a representation of reality, thus a model in the broadest sense. Sometimes mapping is distinguished from modelling by stating that mapping is a simple representation of reality, while modelling is trying to cover more complexity in reality.

Explanation:

Answer:

Metabolism is a combination of biochemical processes that your body uses to convert food into energy. These metabolic processes include breathing, eating and digesting food, the delivery of nutrients to your cells through the blood, the use of energy by your muscles, nerves, and cells, and finally the elimination of waste products from your body.

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Metabolism is the chemical processes that occur within a living organism in order to maintain life.

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Answer: 140

Explanation:

Given the following :

Mass of metal = 18g = 0.018kg

Mass of water (calorimeter) = 21g = 0.021kg

Initial temperature of metal = 273 + 96 = 369k

Initial temperature of water = 273 + 24 = 297k

Final temperature inside calorimeter = 273 + 26 = 299k

Temperature change of metal = 299 - 369= -70k

Temperature change of water = 299 - 297 = 2k

H = mc ΔT

m = mass

c = specific heat capacity

ΔT = change in temperature

Heat lost by metal = heat gained by water

mc ΔT = mc ΔT

Specific heat capacity of water = 4200

18 * C * ( 299 - 369 ) = 21 * 4.2 * ( 299 - 297)

0.018 × C × -70 = 0.021 × 4.2 × 2

- 1.26 × C = 0.1764

C = 176.4/1.26

C = 140

This problem is providing the total volume of a graduated cylinder, 100 mL with 45.0 mL of water, but when adding a piece of steel, the volume rises to 55.5 mL so the volume of the metal is required and found to be 10.5 mL according to:

In chemistry, density experiments require the use of a well-measured volume of water in order to add the density-unknown object so the difference in the volume lead to the that of the object.

In such a way, since 45.0 mL of water is risen to 55.5 mL upon the addition of the steel, one can calculate the difference in order to get the volume of steel as 55.5 mL comprises both water and the object:

\(V^{steel}=55.5mL-45.0 mL\\\\V^{steel}=10.5 mL\)

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The periodic table is known to consist of different elements. According to the chart, the element is lithium with an atomic number of 3.

This element is mostly used in the production of rechargeable batteries for mobile phones, laptops, etc. and it is also used  non-rechargeable batteries for production of heart pacemakers, toys, etc.

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The option that best describes the outer shell of the atoms in Group 17 on the illustration of the Periodic Table is "They have 7 electrons."Group 17, also known as the Halogens, is a group of nonmetals that have seven valence electrons. The outermost shell of these atoms contains seven electrons, making them highly reactive. These elements readily

react with metals to form salts.There are seven elements in Group 17: fluorine, chlorine, bromine, iodine, astatine, tennessine, and oganesson. All of these elements have seven valence electrons, which is why they are classified

together in the same group of the periodic table. They all have similar properties, such as high electronegativity, reactivity, and the ability to form ionic compounds. Thus, the statement that "They have 7 electrons" best describes the

outer shell of the atoms in Group 17.

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Answer :  δg'o for the phosphorylation of glucose to form glucose 6-phosphate using atp as the source of phosphate are -3.1 kJ/mol and  K'eq  for the phosphorylation of glucose to form glucose 6-phosphate using atp as the source of phosphate are 8.2 × 10⁴

Calculation of δG'o: ΔG'o = -nFΔE'oΔG'o = -2 (2.303RT / F) log [Glucose 6-phosphate] / [Glucose][ATP] / [ADP] - 2 (2.303RT / F) log [H +] , Here, n = number of electrons transferred, R = gas constant (8.314 J/mol.K), F = Faraday constant (96485 C/mol), ΔE'o = standard cell potential.The standard free energy change (ΔG'o) for the reaction is calculated from the standard cell potential (ΔE'o) using the above formula.ΔG'o = -3.1 kJ/mol

Calculation of K'eq: K'eq = [Glucose 6-phosphate] / [Glucose][ATP] / [ADP]Here, K'eq is the equilibrium constant.The concentration of each reactant and product is divided by the activity coefficient of each substance, which depends on the concentration and nature of the ions present in the solution. The concentration of each substance is expressed in molarity, while the activity coefficient is dimensionless.K'eq = 8.2 × 10⁴

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The correct equilibrium constant expression for the given reaction equation is:

Kc = [N2][O2]/[N2O2]

The equilibrium constant expression is determined by the stoichiometry of the balanced chemical equation. In this case, the balanced equation is:

N2O2(g) ⇋ N2(g) + O2(g)

According to the Law of Mass Action, the equilibrium constant expression is given by the concentrations of the products divided by the concentrations of the reactants, each raised to the power of their respective stoichiometric coefficients.

Thus, for the reaction N2O2(g) ⇋ N2(g) + O2(g), the equilibrium constant expression is:

Kc = [N2][O2]/[N2O2]

Here, [N2] represents the concentration of nitrogen gas (N2), [O2] represents the concentration of oxygen gas (O2), and [N2O2] represents the concentration of dinitrogen tetroxide gas (N2O2) at equilibrium.

The equilibrium constant expression for the given reaction equation N2O2(g) ⇋ N2(g) + O2(g) is Kc = [N2][O2]/[N2O2]. This expression allows us to quantify the extent of the reaction at equilibrium based on the concentrations of the reactants and products.

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Answer:

There were originally 8 atoms of Potassium-40.

Explanation:

The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.

If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.

Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :

After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.

After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.

After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.

Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.

Answer:

independent variable -- different batteries

dependent variable -- the time that clock stop

Explanation:

In an experiment or a research study, there are two type of variables that can affect the result of the experiment or the conclusion. They are independent variable and the dependent variable.

An independent variable may be defined as that variable in an experiment which can be changed or can be controlled in the scientific experiment in order to test the effect on the dependent variable. It cannot be changed by other variables.

On the other hand, dependent variable are those are those which can be altered or change that can affect the experiment.

In the context, Emily uses  the different types of the batteries as an independent variable and the time where the clock stopped in the dependent variable in her research.

Answer:

18g

Explanation:

Molarity = n/V

Where;

n = number of moles (mol)

V = volume (L)

Based on the given information,

M = 2.0 M

V = 50 mL = 50/1000 = 0.05L

Using; Molarity = n/V

n = molarity × volume

n = 2.0 × 0.05

n = 0.1mol

Using mole = mass/molar mass

Molar mass of C6H12O6 = 12(6) + 1(12) + 16(6)

= 72 + 12 + 96

= 180g/mol

Mass = mole × molar mass

Mass = 0.1 × 180

Mass = 18g

Answer

changing from liquid to gas

Explanation

changing from liquid to gas

Answer:

2.0 x 10²³ atoms Au = 65.4g

1.5 x 10²³ atoms Pb = 51.6g

7.9 x 10²¹ atoms U = 3.1g

Explanation:

We want to convert each to grams.

We can use dimensional analysis to do so.

Kindly view the attached image for work.

1.) 2.0 x 10²³ atoms Au

Needed conversions:

Math: (2.0x10²³atoms)/(6.022x10²³atoms) x 196.966g = 65.4g

2.) 1.5 x 10²³ atoms lead

Needed conversions:

Math: (1.5x10²³atoms)/(6.022x10²³atoms) x 207.2g = 51.6g

3.) 7.9 x 10²¹ atoms U

Needed conversions:

Math: (7.9x10²¹atoms)/(6.022x10²³atoms) x 238.029g = 3.1g

The energy as heat needed to increase the temperature of 0.40 mol of tungsten by 10.0 K is 96.8J.

The energy of a substance can be calculated using the following formula;

Q = mc∆T

Where;

According to this question, the molar heat capacity of tungsten is 24.2 J/K•mol. The energy as heat needed to increase the temperature of 0.40 mol of tungsten by 10.0 K is as follows:

Q = 0.40 × 24.2 × 10

Q = 96.8J

Therefore, 96.8J is the energy of the tungsten metal.

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Answer:

See explanation

Explanation:

A gene mutation can be defined as a permanent change in the DNA sequence that composes a gene, resulting in the observation that the sequence differs from what is obtainable in most individuals that make up the  population. Mutations range from a change in a single DNA building block (change in the sequence of base pairs) to changes in a large segment of a chromosome that includes multiple genes.

Mutation in the color of the wings of the housefly can be passed on to the next generation. If this trait enhances survival of the butterflies, the orange winged butterflies will eventual become extinct and become entirely replaced by the white winged butterflies. This implies that gene pool has been completely modified.

If same kind of mutation of pigmentation of wings is observed in the butterfly then they will result in a white butterfly.

If a gene of the DNA get damaged or changes in such a way that it also results in the changing of genetic message carried by that gene and this process is known by the name of mutation.

In the given question by breeding orange butterfly with a white butterfly in the latest generation of animals, notices a mutation in the genes that calls for pigment in the wings. If the mutation of pigmentation of wings is passed to the next generations with the  same changes in the gene of DNA, then after some generation we would get white butterfly.

Hence, if the same changes observed in the mutation of pigmentation of wings then we get a white butterfly.

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A filter bubble involves the personalization of information through algorithms, while an echo chamber refers to the reinforcement of beliefs through interactions with like-minded individuals.

Filter bubbles and echo chambers are similar concepts, but they can be distinguished based on the mechanism by which information is filtered.

A filter bubble is a situation in which an individual is exposed only to information that is in line with their personal beliefs and opinions. This occurs when online algorithms, such as those used by search engines and social media platforms, prioritize content that is likely to be of interest to the user based on their previous behavior and preferences. This creates a personalized information environment that can limit exposure to diverse perspectives and ideas.

An echo chamber, on the other hand, refers to a situation in which individuals primarily interact with others who hold similar beliefs and opinions. This often occurs in online communities, such as social media groups or forums, where like-minded individuals gather to discuss and reinforce their shared beliefs. Within an echo chamber, it can be difficult for new or alternative viewpoints to penetrate and be heard.

An example that distinguishes filter bubbles and echo chambers is a person who only gets their news from a conservative news outlet, such as Fox News, and interacts primarily with friends who also share their political views on social media. This person is experiencing both a filter bubble, as the news source they use prioritizes content that aligns with their political beliefs, and an echo chamber, as they are only interacting with others who hold similar views.

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Answer:

427.5g

Explanation:

Given parameters:

Number of moles  = 4.5moles

Unknown:

Mass of MgCl₂  = ?

Solution:

To solve this problem;

     Mass  = number of moles x molar mass

Molar mass of MgCl₂  = 24 + 2(35.5) = 95g/mol

  Mass  = 4.5 x 95  = 427.5g

When the preexisting molecular links are broken and new bonds are created between oxygen and hydrogen atoms, hydrogen molecules react strongly with oxygen molecules.

The outcome is an explosive release of energy and the formation of water since the reaction's products are at a lower energy level than its reactants.

The most well-known instance of a synthesis reaction is the burning of hydrogen and oxygen to produce water.

Most of the water that was created was in the form of vapors, which mixed with cosmic dust on the way to the earth's surface. These water vapors condensed into oceans, seas, rivers, and lakes when the world first came into existence.

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(a) If the pressure is 10.0 atm, the temperature is 62.0 K.

(b) if the temperature is 225 k, the pressure is 36.3 atm.

a) In order to calculate the temperature, we need to use the ideal gas law, PV = nRT, where P is the pressure, V is the volume of the container, n is the number of moles of argon, R is the ideal gas constant, and T is the temperature.

We can calculate the number of moles, n, by using the molar mass of argon, which is 39.948 g/mol.

We have n = 186 g / 39.948 g/mol = 4.656 mol.

So we can plug in our values and solve for T:

T = (10.0 atm)(2.37 L) / (4.666 mol)(0.08206 L·atm/mol·K) = 62.0 K.

b) To calculate the pressure, we can again use the ideal gas law, PV = nRT. We know the values of n, R, and T from the previous question.

Since the volume of the container is given, we can plug in these values to solve for P:

P = (4.666 mol)(0.08206 L·atm/mol·K)(225 K) / 2.37 L = 36.3 atm.

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Compared to the average population around the world, North America has a (a) 24% greater percentage of people with access to safely managed drinking water facilities as of 2020.

According to the information provided, the percentage of the population with access to drinking water facilities in North America is higher than the average for the world.

The exact percentage varies depending on the option selected in the question, but the difference ranges from 16% to 98%. This difference may be attributed to several factors, including a more developed infrastructure and better regulation of water quality in North America.

However, it is important to note that access to drinking water is still a significant issue in some areas of North America, particularly among marginalized communities. Efforts to improve water access and quality must continue to ensure that everyone has access to this essential resource.

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We can use the ideal gas law, PV = nRT, to determine the new pressure of the gas when its volume increases. The ideal gas law relates the pressure, volume, and temperature of a gas to the number of moles (n) of gas and the gas constant (R).

First, we'll convert the temperature to kelvins:

\(T (K) = 24°C + 273 = 297 K\)

Next, we'll use the original pressure and volume to determine the number of moles of gas (n):

PV = nRT

n = PV / RT

n = (100 kPa * 5.0 L) / (8.31 J/mol K * 297 K) = 0.17 mol

Finally, we'll use the new volume, the number of moles of gas, and the temperature to determine the new pressure:

PV = nRT

P = (nRT) / V

P = (0.17 mol * 8.31 J/mol K * 297 K) / (20.0 L) = 46.5 kPa

So the new pressure of the gas is 46.5 kPa, when its volume increases from 5.0 L to 20.0 L while the temperature remains constant at 24°C.

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Explanation:

Copper (II) sulfate is usually present as a hydrous state, which is of the form CuSO4 * nH2O, where n is a whole number.

Mass of sample (CuSO4 * nH2O)

= 152.00g - 128.10g = 23.90g.

Mass of water loss during heating

= 152.00g - 147.60g = 4.40g.

Molar mass of H2O = 18g/mol

Moles of H2O in sample

= 4.40g / (18g/mol) = 0.244mol.

Mass of anhydrous sample (CuSO4)

= 23.90g - 4.40g = 19.50g

Molar mass of CuSO4 = 159.61g/mol

Moles of CuSO4 in sample

= 19.50g / (159.61g/mol) = 0.122mol.

Since mole ratio of CuSO4 to H2O

= 0.122mol : 0.244mol = 1:2, n = 2.

Hence we have CuSO4 * 2H2O.

Answer:

Copper(II) Sulphate (CuSO4.7H2O) is generally present in a hydrated form.

Mass of the CuSO4.7H2O sample before heating

(152.00-128.10)g = 23.90 grams

Mass of the water loss due to heating

(152.00-147.60)g = 4.40 grams

The phosphorylation of fructose 6-phosphate to fructose-1,6-bisphosphate is the committed step in glycolysis because. it is the rate-limiting step

The first step in the metabolism of carbohydrates is frequently their phosphorylation. Because the phosphate group stops the molecules from migrating back across the transporter, phosphorylation enables cells to store carbohydrates. Glucose phosphorylation is a crucial step in the metabolism of sugar. In the first phase of glycolysis, D-glucose is converted to D-glucose-6-phosphate using the chemical equation D-glucose + ATP D-glucose-6-phosphate + ADP G° = 16.7 kJ/mol (° signifies measurement under standard conditions).

The rate-limiting stage in the liver's metabolism of glucose is the initial rate of phosphorylation of glucose (ATP-D-glucose 6-phosphotransferase) and non-specific hexokinase. Hepatic cells are freely permeable to glucose (ATP-D-hexose 6-phosphotransferase).

encouraging certain glucose transporters to translocate to the cell membrane.

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Answer:

8.99×10^-7m

Explanation:

The wavelength can be calculated using the expression below

E=hcλ

Where E= energy= 2.21 x 10^-19 J.

C= speed of light= 3x10^8 m/s

h= planks constant= 6.626 × 10^-34 m2 kg / s

E=hcλ

λ= E/(hc)

Substitute for the values

λ=( 2.21 x 10^-19 )/(6.626 × 10^-34 × 3x10^8 )

= 8.99×10^-7m

Answer:

Look at the explanation this one is hard

Explanation:

show your work:

E = hc/ λ

E λ = hc

λ = hc/E

λ = 6.626 x 10^-34 x 3 x 10^8 / 2.21 x 10^-19  

=

8.994 x 10-7 m or 899.4 nm

800nm – 3mm is the range of wavelengths for infrared waves.

Night vision cameras use infrared waves.

The correct statement will be"The largest source of background ionizing radiation in the United States is Radon (Rn)which is formed in the decay series of uranium."

Generally, Ionizing radiation is simply defined as a state of energy that works by releasing electrons from their parent atoms or the molecules of materials.

In conclusion, Radon (Rn) a chemical element of Group 18 in the periodic table is the largest source of background ionizing radiation in the United States.

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