Flammability, and the ability to corrode, are examples of
F properties of noble gases
G physical properties
H physical changes
J chemical properties

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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The addition of ice at the end of the heating process is important because it increases the solubility of the aspirin product.

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Answer:ionic radius increases down the

Explanation:

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Chlorinated fluorocarbons are considered hazardous substances due to their detrimental impact on the ozone layer, but they are not explicitly listed as hazardous waste.

Chlorinated fluorocarbons (CFCs), despite not being on the list of hazardous waste, are nonetheless regarded as toxic due to their detrimental impact on the ozone layer and the environment. The Montreal Protocol has phased out CFCs, which were once widely used in sectors like refrigeration and as aerosol propellants.

They cause ozone depletion when they are released into the atmosphere. Although CFCs are not classified as hazardous waste, they can have a severe impact on the environment and people's health if they are improperly disposed of or leaked.

The ecosystem and public health may be in danger since CFCs persist in the environment and contribute to air pollution. It's critical to handle and dispose of CFCs properly to reduce their harmful effects on the environment and to prevent further ozone layer damage.

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A 355-ml can of soda pop contains 41 g of sucrose the molarity of the solution with respect to sucrose is 0.337 M

Given that 41g of sucrose

Number of moles = amount in g/ molar mass

Number of moles= 41 g / 342.2965 g/mol

Number of moles= 0.12 moles Sucrose

Volume = 355 ml or 0.355 L

Thus,

Molarity = 0.12 moles / 0.355 L

Molarity= 0.337 M

The term "molarity of the solution" refers to how many moles of solute there are in a liter of solution. M served as its symbol. The ratio of moles of solutes per liter of solution is known as the molarity of any solution. The following formula captures it.

Molarity (M) = moles of solute/liter of solution

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The average speed in miles per hour, given the data is 13 miles per hour

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

This is the total distance travelled divided by the total time taken to cover the distance.

Average speed = total distance / total time

The following data were obtained from the question:

The average speed can be obtained as follow:

Average speed = total distance / total time

Average speed = 6.5 / 0.5

Average speed = 13 miles per hour

Thus, the average speed is 13 miles per hour

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Answer:

CH₃CH₂CH₂OH → CH₃CH=CH₂ + H₂O

Explanation:

La ecuación que representa la reacción del alcohol 1-butílico (también llamado como 1-butanol o n-butanol) con H₂SO₄ como catalizador a altas temperaturas es:

CH₃CH₂CH₂OH → CH₃CH=CH₂ + H₂O

Los productos son agua y buteno.

When there is the two of the same element on the product side, you can balance chemical reactions by placing the coefficient in front of the element.

It should be noted that coefficients are whole numbers and should be chosen in such a way that they give the smallest possible whole numbers in the ratio of atoms.

Before that, let us revise how to balance chemical equations and then we will learn how to balance equations when there are two of the same element on the product side.

Balancing chemical equations:When we write an equation for a chemical reaction, the number of atoms on both sides of the equation should be equal. Balancing the equation is the process of making the number of atoms equal. 

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To determine the numerical value of Q for the given reaction, we need to calculate the reaction quotient using the partial pressures provided.

Part 1:

The reaction quotient Q is calculated by taking the ratio of the partial pressures of the products to the partial pressures of the reactants, each raised to their respective stoichiometric coefficients. For the given reaction:

\(Q = (PCl5 / PCl3 * Cl2)\)

Substituting the given partial pressures:

\(Q = (0.29 / (0.21 * 0.41)) ≈ 3.858\)

Part 2:

To determine whether the reaction mixture is at equilibrium, we compare the value of Q to the equilibrium constant Kp at the given temperature.

If Q < Kp, it means the reaction has not reached equilibrium, and the reaction will proceed in the forward direction to reach equilibrium. This means that more PCl5 will be formed, leading to an increase in the partial pressures of PCl5 and a decrease in the partial pressures of PCl3 and Cl2.

If Q > Kp, it means the reaction has exceeded equilibrium, and the reaction will proceed in the reverse direction to reach equilibrium. This means that PCl5 will decompose, leading to a decrease in the partial pressures of PCl5 and an increase in the partial pressures of PCl3 and Cl2.

Since Q = 3.858 and Kp = 3.8, Q is slightly greater than Kp. Therefore, the reaction mixture is not at equilibrium, and the reaction will proceed in the reverse direction to achieve equilibrium.

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1) Write the chemical equation.

2) List the known and unknown quantities.

Sample1: H2O2.

Mass: 8.33 g.

Sample2: N2H4.

Mass: 6.48 g.

Sample3: N2

Mass of N2 produced: unknown

3) Convert mass to moles.

3.1-Convert the mass of H2O2 to moles of H2O2.

The molar mass of H2O2 is 34.01468 g/mol.

We have 0.244894 mol H2O2.

3.2-Convert the mass of N2H4 to moles of H2O2.

The molar mass of N2H4 is 32.04516 g/mol.

We have 0.202215 mol N2H4.

4) Limiting reactant.

4.1-How many moles of N2H4 do we need to use all of the H2O2?

The molar ratio between N2H4 and H2O2 is 1 mol N2H4: 2 mol H2O2.

We need 0.122447 mol N2H4 and we have 0.202215 mol. We have enough N2H4. This is the excess reactant.

4.1-How many moles of H2O2 do we need to use all of the N2H4?

The molar ratio between N2H4 and H2O2 is 1 mol N2H4: 2 mol H2O2.

We need 0.40443 mol H2O2 and we have 0.244894 mol H2O2. We do not have enough H2O2. This is the limiting reactant.

5) Moles of N2 produced from the limiting reactant.

Limiting reactant: We have 0.244894 mol H2O2.

The molar ratio between H2O2 and N2 is 2 mol H2O2: 1 mol N2.

6) Convert moles of N2 to mass of N2.

The molar mass of N2 is 28.01340 g/mol.

The mass of N2 produced in the reaction is 3.43 g N2.

.

Answer:

A.) An equation that can be used to accurately calculate the pull of gravity between two objects.

Explanation:

I just took the quiz on ap3x, I hope this helped!

The phrase that describes the scientific law is an equation that can be used to accurately calculate the pull of gravity between two objects. The correct option is A.

Scientific laws, also known as laws of science, are statements that describe or predict a variety of natural phenomena based on repeated experiments or observations.

In many cases, the term law is used in a variety of contexts across all fields of natural science.

Scientific laws, the same as theories, characterize phenomena that the research establishment has proven to be accurate.

Laws, in broad sense, characterize what will happen in a given situation as demonstrated by a math formula, so even though theories describe how the phenomenon occurs.

Repeated observations or experiments result in the formation of scientific laws.

They begin with a scientific hypothesis and progress through scientific research that provides empirical data and data analysis. There are numerous instances of scientific laws.

Thus, the correct option is A.

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There are two types of chemical compound one is covalent compound other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, NaBr is a ionic compound and has a crystalline structure.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Ionic compounds are formed by cation and anion. Sodium bromide is an ionic compound. Sodium is a metals so it act as cation as Na⁺ and Chlorine is a non metal so it act as anion as Br⁻. Both ions combine to form NaBr. sodium bromide has crystalline structure.

Therefore, NaBr is a ionic compound and has a crystalline structure.

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The process by which water vapor loses heat and transforms into liquid water, releasing latent heat in the process, is known as condensation.

The release of latent heat from water molecules is known as "condensation". It occurs when water vapor, which is a gaseous state of water, loses heat and transforms into liquid water. During this process, the energy that was previously used to change the state of water from liquid to gas (latent heat) is released. This process is essential to many natural phenomena, such as the formation of clouds, rain, and dew. It also plays a critical role in various industrial processes, including power generation, refrigeration, and air conditioning.

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The amount of heat evolved when 27.0 g of glucose is burned according to the equation is (A) 421 kJ.

The balanced chemical equation for the combustion of glucose is

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O.

To determine the amount of heat evolved when 27.0 g of glucose is burned, we need to use the molar mass of glucose and the given heat of combustion (ΔHcomb) in kJ/mol. The molar mass of glucose (C₆H₁₂O₆) can be calculated as follows:

Molar mass of C = 12.011 g/mol

Molar mass of H = 1.008 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of glucose = (6 x 12.011) + (12 x 1.008) + (6 x 15.999) = 180.156 g/mol

So, 27.0 g of glucose is equal to 27.0/180.156 = 0.1499 mol of glucose.

The amount of heat evolved when 1 mol of glucose is burned is ΔHcomb = -2808 kJ/mol.

So, the amount of heat evolved when 0.1499 mol of glucose is burned is:

ΔHcomb x 0.1499 mol = -2808 kJ/mol x 0.1499 mol = -420.8 kJ (rounded to one decimal place)

Therefore, the amount of heat evolved when 27.0 g of glucose is burned is 420.8 kJ. However, since the answer choices are given in kJ and not in kJ/mol, we need to round the answer to the nearest whole number. The correct answer is therefore (a) 421 kJ.

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That oil sands executive is greedy and heartless and therefore can't be trusted when she claims is Ad hominem attack. So, Option B is correct.

4-  The argument in question 4 is an example of an ad hominem attack. This is due to the argument's focus on the character of the oil sands executuive rather than the actual problem, which is how to improve the company's environmental record.

The argument holds that the executive cannot be believed when she says she wants to improve the company's environmental record because she is avaricious and callous. This is an error in logic, though, as the executive's character may not necessarily be related to the company's environmental policies.

5-  The argument in question 5 is an example of an appeal to ignorance. This is because the argument states that there is no proof that humans are causing climate change, so it must be natural causes. Just because there is no conclusive proof that humans are causing climate change, it does not mean that they are not.

The argument assumes that just because there is no evidence to the contrary, the argument must be true. This is a logical fallacy.

So, Option B is correct.

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The sum of 3(3)/(8) and 6(1)/(2) is 5(5)/(8), which is a mixed number representing 5 whole units and 5/8 of another unit.

To find the sum of mixed numbers, we need to add the whole numbers and the fractions separately. Add the whole numbers: 3 + 6 = 9

Add the fractions: For the fractions 3/(8) and 1/(2), we need to find a common denominator. The least common multiple of 8 and 2 is 8.

Converting 3/(8) to have a denominator of 8:

3/(8) = (3 x 1)/(8 x 1) = 3/(8)

Converting 1/(2) to have a denominator of 8:

1/(2) = (1 x 4)/(2 x 4) = 4/(8)

Now, we can add the fractions:

3/(8) + 4/(8) = (3 + 4)/(8) = 7/(8)

Combine the whole numbers and fractions:

The whole numbers sum was 9 and the fractions sum was 7/(8). We can write this as a mixed number by dividing the numerator (7) by the denominator (8). The quotient is 0 with a remainder of 7. Therefore, the mixed number is 0(7)/(8), which can be simplified to 7/(8).

Therefore, sum of 3(3)/(8) and 6(1)/(2) is 5(5)/(8).

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Answer:

The mass left after 24.6 years is 25.0563 grams

Explanation:

The given parameters are;

The mass of the hydrogen-3 = 100 grams

The half life of hydrogen-3 which is also known as = 12.32 years

The formula for calculating half-life is given as follows;

\(N(t) = N_0 \times \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{\frac{1}{2} }} }\)

Where;

N(t) = The mass left after t years

N₀ =  The initial mass of the hydrogen-3 = 100 g

t = Time duration of the decay = 24.6 years

\(t_{\frac{1}{2} }\) = Half-life = 12.32 years

\(N(24.6) = 100 \times \left (\dfrac{1}{2} \right )^{\dfrac{24.6}{12.32}} } = 25.0563\)

The mass left after 24.6 years = 25.0563 grams.

From thermal comfort point of view, thick walled structures are beneficial in hot and humid climates is the statement that is true.The correct option is C.

Thick walled structures are beneficial in hot and humid climates from the thermal comfort point of view.How do thick walled structures help in hot and humid climates - In hot and humid climates, thick walls tend to absorb the heat present in the environment. This absorption helps to keep the interior of the structure cool.

Additionally, thick walls take more time to heat up and more time to cool down. Thus, in hot and humid climates, thick walls are a better choice than thin walls because they provide thermal comfort.

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Answer:

It is critical to understand how the numbers allocated to entities, objects, and events are to be interpreted. Data collection, analysis, and presentation all need the use of a measurement scale. We should utilize the correct diagram for the data collection, which is highly important for expressing summaries and conclusions to the audience quickly and simply.

I- (aq) + 6H₂O(l) + 6H+(aq) → IO₃-(aq) + 3H₂O(l) + 2e-; 2 electrons are needed and the reaction is an oxidation.

The half-reaction is:

i- (aq) → IO₃- (aq)

To balance this half-reaction of Iodine, we need to add water and hydrogen ions on the left-hand side and electrons on one side to balance the charge. In acid solution, we will add H₂O and H+ to the left-hand side of the equation. The balanced half-reaction in acid solution is:

I- (aq) + 6H₂O(l) + 6H+(aq) → IO₃-(aq) + 3H₂O(l) + 2e-

Therefore, 2 electrons are needed to balance this half-reaction.

The half-reaction involves iodine changing its oxidation state from -1 to +5, which means that it has lost electrons and undergone oxidation. Therefore, this half-reaction represents an oxidation process.

In summary, the balanced half-reaction in acid solution for the oxidation of iodide to iodate is I- (aq) + 6H₂O(l) + 6H+(aq) → IO₃-(aq) + 3H₂O(l) + 2e-. This process involves the loss of two electrons, representing an oxidation process.

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Answer:

\(1.7137\ \text{mg/L}\)

Explanation:

Chlorine gas available = 27 lbs = \(27\times 453.59237=12247\ \text{g}\)

Amount of water used each day = 750000 gal = \(750000\times3.785411784=2839058.84\ \text{L}\)

Rate at which chlorine gas used = 2.6 mg/L

Chlorine gas used

\(2839058.84\times 2.6\times 10^{-3}=7381.55\ \text{g}\)

Residual content of chlorine = \(12247-7381.55=4865.45\ \text{g}\)

Concentration of the residual chlorine is given by

\(\dfrac{4865.45}{2839058.84}=0.0017137\ \text{g/L}=1.7137\ \text{mg/L}\)

Concentration of the residual chlorine is \(1.7137\ \text{mg/L}\).

Answer: 3.83

Explanation:

Answer:

3.83 :)

Explanation:

:)

The target enzyme inhibited by arsenate in glycolysis is the enzyme phosphofructok---inase

An important stage in glycolysis is the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, which is catalyzed by phosphofruc---tokinase, a crucial regulatory enzyme in the glycolytic system.

The structural resemblance of arsenate to inorganic phosphate is thought to be the mechanism of inhibition. In order to complete the process, phosphofructokinase binds to the substrate fructose-6-phosphate and needs inorganic phosphate as a cofactor. However, because  and arsenate have comparable chemical characteristics, arsenate can also attach to the enzyme in its place. An arsenate-enzyme complex is created as a result.

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Answer:

I think physical but I could be wrong

Answer:

Chemical

Explanation:

Fire has chemicals in side of it and physical is to a living thing.(sorry if im wrong)

The equilibrium constant for the un-catalyzed reaction is 0.9

The enzyme triose phosphate isomerase catalyzes the reaction in the forward direction as part of the glycolytic pathway. It follows simple Michaelis-Menten kinetics.

Typical cellular concentrations:

triose phosphate isomerase = 0.1 nM

dihydroxyacetone phosphate = 5 µM

glyceraldehyde-3-phosphate = 2 µM

So, equillibrium constant is

K = \(\frac{[P]}{[S]}\)

K = \(\frac{ glyceraldehyde-3-phosphate}{dihydroxyacetone phosphate}\)

Therefore, The equilibrium constant for the un-catalyzed reaction is 0.9

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If a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite, fizzing will occur because carbon dioxide is produced.

Effervescence observes whenever any gas tried to escape out from an aqueous solution, that's why CO₂ show effervescence.

Reaction between dolomite and acetic acid will be represented as:

MgCO₃ + 2CH₃COOH → CO₂ + H₂O + Mg(CH₃COO)₂

From the above reaction it is clear that carbon dixide gas is produced by showing the effervescence and fizzing behavior.

Hence, option (2) is correct.

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Answer:

B

Explanation:

on edge2022

Answer:

10.

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

.......

Explanation:

\( \frac{6.900 \times {10}^{10} }{4.000 \times {10}^{8} } \\ 1.725 \times {10}^{10 - 8} \\ 1.725 \times {10}^{2} \)

Hope it will help you :)

Answer:

A

Explanation:

i think A is correct answer because

A has 8 Electrons& Protons

and it's electronic configuration ns² np⁶.

which allow it to gain 2 electrons to reach stability.