a
A flying plane with a total surface area of 200 m2., air acts on the plane body with a force
of 8000000N. Find the air
pressure.

Answer:

answer is option a..............

Answer:

nitrogen because it has less number of protons and electrons, thus a samller atomic mass

Explanation:

Explanation:

The molecular formula of the compound is (d) \(S_2O_6\).

The molar mass of a compound represents the mass of one mole of that compound. To determine the molecular formula, we need to find the ratio between the empirical formula and the molecular formula. The empirical formula gives the simplest whole-number ratio of atoms in a compound. In this case, the empirical formula is \(SO_2\), indicating that for every one sulfur atom, there are two oxygen atoms.

To find the molecular formula, we need to compare the molar mass of the empirical formula with the given molar mass of the compound. The molar mass of the empirical formula \(SO_2\) can be calculated by adding the atomic masses of sulfur (S) and oxygen (O):

Molar mass of \(SO_2\) = (32.07 g/mol for S) + (2 × 16.00 g/mol for O) = 64.07 g/mol.

Since the molar mass of the empirical formula matches the given molar mass of the compound, the empirical formula is also the molecular formula. Therefore, the molecular formula of the compound is \(S_2O_6\).

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In salt hydrolysis, the conjugate bases of weak acids yield basic solutions, while the conjugate acids of weak bases yield acidic solutions. This phenomenon occurs because the hydrolysis of a salt produces either hydroxide ions or hydronium ions, depending on the nature of the salt.

For example, when the salt of a weak acid and a strong base is hydrolyzed, the conjugate base of the weak acid is formed, which acts as a weak base. This weak base can then react with water to produce hydroxide ions, leading to an increase in the pH of the solution and a basic solution. Conversely, when the salt of a weak base and a strong acid is hydrolyzed, the conjugate acid of the weak base is formed, which acts as a weak acid. This weak acid can then react with water to produce hydronium ions, leading to a decrease in the pH of the solution and an acidic solution.

It is important to note that the strength of the acid or base will also influence the pH of the solution, as stronger acids and bases will have a greater impact on the pH. Additionally, the concentration of the salt and the water will also impact the degree of hydrolysis and the resulting pH of the solution.

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A) The expression for the reaction rate law can be written as: Rate=k[NO2][F2]

B) To calculate the value for the rate constant, we need to choose any set of concentrations and corresponding rates from the data provided and substitute them in the rate law expression. Let's use the first set of concentrations and rates:

Rate = k[NO2][F2]

0.026 mol L^-1 s^-1 = k(0.1 mol L^-1)(0.1 mol L^-1)

k = 0.026 mol L^-1 s^-1 / (0.1 mol L^-1)(0.1 mol L^-1)

k = 2.6 L^2 mol^-2 s^-1

C) The overall order of the reaction is the sum of the orders with respect to each reactant. In this case, the reaction rate law is first order with respect to both [NO2] and [F2]. Therefore, the overall order of the reaction is 1 + 1 = 2.

In summary, the expression for the reaction rate law is Rate=k[NO2][F2], the rate constant (k) was calculated to be 2.6 L^2 mol^-2 s^-1 using the initial rate data, and the overall order of the reaction is 2 since it is the sum of the orders with respect to each reactant.

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Answer: you have to be sure to cite evidence

The percentage composition of each element in the compound can be determined from the molar ratio of elements or from the measured masses of each element in a compound. So both ways are accurate and exact regarding the respective calculations of percentages.

In general, in a compound, the mass percentage of each element can be determined by calculating the mass of the element. In this way, we can see that both quantities are interrelated to each other. So, is a user does the exact calculation then there are high chances of accuracy of both methods.

In Chemistry, the calculations of mass percentage as well as the calculation of the mass of the chemical compound has their own significance as both are applicable to various fields of Chemistry. So, a comparison between their accuracies always leads to a neutral answer as both methods are exact and accurate.

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Answer:

temperature

Explanation:

Answer:

It is made up of 2 elements. The elements are calcium and chlorine.

Explanation:

I just know

\(K_c = \frac{[NH_2]^{1}[H_2S]^{1}}{[NH_2HS]^{1}}\) is the equilibrium constant expression for

NH₂HS(S)   →   NH₂(g) + H₂S(g). Hence, option A is correct.

A number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.

Equilibrium constant for the NH₂HS(S)   →   NH₂(g) + H₂S(g) will be:

\(K_c = \frac{[Product]^{coefficient}}{[Reactantt]^{coefficient}}\)

\(K_c = \frac{[NH_2]^{1}[H_2S]^{1}}{[NH_2HS]^{1}}\)

Hence, option A is correct.

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Nuclear fission occurs when a nucleus breaks up into two equal fragments that release and separate more atoms. So, the correct option is B.

Nuclear fission is a process in which the nucleus of an atom breaks apart into two or more smaller nuclei. This process releases a significant amount of energy.

This energy is utilized in various applications, including nuclear power generation and nuclear weapons. Nuclear fission reactions are carefully controlled in nuclear power plants to ensure the sustained release of energy without leading to uncontrolled chain reactions. Hence the correct option is B.

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Answer:

q=m*c*•

Explanation:

•=50-2

m=25

c=4.18

q=?

use this

Answer:

4834.20 ml or 4.8342 L

Explanation:

Gold has density of 19.30 g/ml

so according to d = m/V

V = m/d = 93,300/19.30 = 4834.19689119 = 4834.20 ml or 4.8342 L

The volume of nuggets of gold that has a mass of 93,300g is 4834.20 ml or 4.8342 L.

Volume is the space occupied by a three-dimensional object.

Density is the mass per unit volume. Density is a scalar quantity. It is denoted by d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.

Density is directly proportional to mass and inversely proportional to volume. Thus, with an increase in density, mass increases and volume decreases, and vice-versa

Gold has a density of 19.30 g/ml

so according to density = mass/ volume

V = m/d = 93,300 / 19.30 = 4834.19

4834.20 ml or 4.8342 L

Therefore, the volume of nuggets of gold that has a mass of 93,300g is 4834.20 ml or 4.8342 L.

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A mature chicken of about 10 months of age is almost always cooked by Braise or Stew cooking method.

A mature chicken, which is over 10 months old and weighing in the range of 4 to 7 pounds. Their meat is very flavorful but tougher than that of the broiler-fryers and roasters.

They are best used for stews and soups, or should be cooked slowly with a moist heat method such as simmering or braising.

The main cooking method for Mature birds should be Braise or stew,

Braising involves cooking large pieces of meat or chicken partially covered in liquid, while stewing uses smaller pieces of meat totally immersed in liquid.

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The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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H₃PO₃ could be the unknown substance.

NaOH and NH₃are all basic so they must not be the unknown solute since the solution is acidic.

CH₃COCH₃ is a nonelectrolyte, which means it does not dissociate into ions when it dissolves in water. Acetone must not be the unknown since the solution is weakly conducted.

The two remaining candidates, HNO₃ and H₃PO₃ are both acids. The unknown solution does not conduct electricity as well as a solution of NaCl of the same concentration, which means that the unknown acid must not dissociate to the same extent as NaCl. Both NaCl and HNO₃ (a strong acid) dissociate 100%. Thus, the unknown solute must be H₃PO₃, which is known to be a weak acid (doesn't dissociate 100%).

What is the H3PO3 name?

Phosphorous acid (or phosphonic acid (singular)) is the compound described by the formula H3PO3. This acid is diprotic (readily ionizes two protons), not tricrotic as might be suggested by this formula.

What are the two colors of litmus paper?

Litmus paper is a strip of paper extracted from lichens, which is dipped into a solution to determine if it is an acid or base. Litmus papers are available in two colors, red and blue. Acidic solutions will change the color of the blue litmus to red strips.

Thus, the unknown substance is H3PO3.

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Answer:

Metallic character of the element

Explanation:

Answer:

Pb(NO

3

)

2

+

2

KI

→

PbI

2

+

2

KNO

3

Explanation:

Answer:

5.0

Explanation:

Answer:

The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.

Explanation:

Answer: The number of electrons in the outermost shell of an atom determines its reactivity.

To calculate the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL, we need to follow a few steps. Here's how to calculate the flow rate in gtt/min:First, we need to convert 2 L 05 NS to mL. 1 L = 1000 mL, so 2 L = 2000 mL. Since we have 50 mL left, we can add it up to get a total volume of 2050 mL.

Next, we need to calculate the total time in minutes, since the flow rate is in gtt/min. 20 hours = 20 × 60 = 1200 minutes.The formula for calculating the flow rate is: Flow rate (gtt/min) = Volume (mL) ÷ Time (min) ÷ Drop factor (gtt/mL)Now we can substitute the given values into the formula:

Flow rate (gtt/min) = 2050 mL ÷ 1200 min ÷ 16 gtt/mLFlow rate (gtt/min) = 0.10677 ≈ 0.11 gtt/min (rounded to 2 decimal places)Therefore, the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL is approximately 0.11 gtt/min.

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To make 2 moles of C6H12O6, we would need 12 moles CO2

Mole can be defined as the unit of amount of substance in the International System of Units. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object.

According to the balanced chemical equation:

6CO2 + 6H2O → C6H12O6 + 6O2

The molar ratio between CO2 and C6H12O6 is 6:1. This means that for every 6 moles of CO2 used, 1 mole of C6H12O6 is produced.

Therefore, to make 2 moles of C6H12O6, we would need:

6 moles CO2/1 mole C6H12O6 × 2 moles C6H12O6 = 12 moles CO2

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a. DNA samples are the most similar (A-F) are sample C and Sample E. These similarities could mean that these two samples may have a closer genetic relationship than the other samples.

b. If Band 8 in Sample F represents the mutated gene that causes baldness, the other DNA samples that may also have the baldness gene are Samples A, C, and E.

Based on the electrophoresis sample provided, it appears that Sample C and Sample E have the most similar DNA bands. This suggests that these two samples may have a closer genetic relationship than the other samples. However, it is important to note that this similarity does not necessarily indicate the presence or absence of the baldness gene.

If Band 8 in Sample F represents the mutated gene that causes baldness, it is possible that Samples A, C, and E may also have the baldness gene. This is because they all have a similar band pattern to Sample F in the same region where Band 8 is located. However, further genetic testing would be necessary to confirm the presence of the baldness gene in these samples.

Your question is incomplete, but most probably your figure can be seen in the Attachment.

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Answer:

yup!

Explanation:

i dont know what else to say.

Answer: -1.4633

Explanation:

The significant figure in the answer should be 2 here, since the number 1.5 contains only two  significant figure. Hence, the answer is - 1.4.

Significant figures are digits in a quantity with certain values along with some uncertain digits. The counting of significant figures of a number should follow some rules.

The zeros after the decimal point which is not following a nonzero number are not significant. Therefore, there are only three significant figure in the number 0.0367.

The number of significant figures in the result  for any arithmetic operation should be equal to the one in operation that is with least significant figures.

Here.  0.0367 have 3 significant figures and 1.5 have two. Therefore, the result should contain only two significant figure.

0.0367 - 1.5  =-  1.4633

Then the result with correct significant figures is rounded to - 1.4 .

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Answer:

Butanoic acid

Explanation:

Pollution is a significant environmental issue that affects various aspects of our planet.

Here are some general observations and descriptions of different types of pollution:

Air Pollution: Air pollution refers to the contamination of the air by harmful substances, such as particulate matter, gases (e.g., nitrogen dioxide, sulfur dioxide), and volatile organic compounds. Common sources include industrial emissions, vehicle exhaust, burning of fossil fuels, and agricultural activities. Air pollution is often visible as smog or haze, and it can have detrimental effects on human health, ecosystems, and climate.

Water Pollution: Water pollution occurs when pollutants enter bodies of water, including rivers, lakes, oceans, and groundwater. It can result from industrial waste discharge, sewage contamination, oil spills, agricultural runoff, and improper disposal of chemicals. Water pollution can lead to the depletion of oxygen levels, the loss of biodiversity, and the contamination of drinking water sources, impacting both aquatic life and human communities.

Soil Pollution: Soil pollution refers to the degradation of soil quality due to the presence of harmful substances. It can occur through the accumulation of industrial waste, agricultural chemicals (e.g., pesticides, fertilizers), mining activities, and improper waste disposal. Soil pollution can affect plant growth, contaminate food crops, and pose risks to ecosystems and human health.

Noise Pollution: Noise pollution is the excessive or disturbing noise that disrupts the environment and causes discomfort or harm to humans and wildlife. Sources of noise pollution include transportation (e.g., road traffic, airplanes), industrial activities, construction sites, and recreational activities. Prolonged exposure to high levels of noise can lead to hearing loss, stress, and other health issues.

Light Pollution: Light pollution refers to the excessive or misdirected artificial light that brightens the night sky and disrupts natural light patterns. It is primarily caused by streetlights, outdoor advertising, and excessive illumination of buildings. Light pollution can have adverse effects on ecosystems, disrupting wildlife behavior, and obscuring our view of stars and other celestial objects.

These are just a few examples of pollution types and their general impacts. It's important to note that the specific observations and severity of pollution can vary significantly depending on geographical location, industrial activities, local regulations, and the level of environmental awareness and action taken by communities and governments.

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