A 0.026 mº tank contains 0.083 kg of Nitrogen gas (N) at a pressure of 2.87 atm. Find the temperature of the gas in °C. Take the atomic weight of nitrogen to be N= 28 g/mol Number: "C

The new pressure of a nitrogen gas at STP is 0.021atm.

The pressure of a gas can be calculated by using the combined gas law equation as follows:

P₁V₁/T₁ = P₂V₂/T₂

Where;

At STP, a gas has the following:

0.073 × 1/273 = 4.53 × P/353

0.0002674 × 353 = 4.53P

P = 0.021atm

Therefore, 0.021atm is the pressure of the nitrogen gas.

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The new pressure of the gas would be  0.0208 atm.

According to the general gas law, the ratio of the product of the pressure and volume to its temperature is constant.

The general gas law is summarily expressed as the following equation:

\(p_1v_1/t_1\) = \(p_2v_2/t_2\). where:

\(p_1\) = initial pressure of a gas

\(v_1\) = initial volume of the gas

\(t_1\) = initial temperature of the gas

\(p_2\) = final pressure of the gas

\(v_2\) = final volume of the gas

\(t_2\) = final temperature of the gas

In this case:

\(p_1\) = standard pressure = 1 atm

\(v_1\) = 73 mL or 0.073 L

\(t_1\) = standard temperature = 273 K

\(p_2\) = ?

\(v_2\) = 4.53 L

\(t_2\) = 80 + 273 = 353 K

\(p_2\) = \(p_1v_1t_2/t_1v_2\)

   = 1x0.073x353/273x4.53

   = 25.769/1236.69

    = 0.0208 atm

Thus, the new pressure of 73.0 mL nitrogen that was heated to a volume of 4.53 L at STP is 0.0208 atm.

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Answer:

Ernest Rutherford's atomic models the basis of our understanding of atoms. The model describes the atom as a tiny and dense with a positively charged core called a nucleus with neutral subatomic particles called neutrons. The model includes negative-charged subatomic particles called electrons that orbit the nucleus.

Ernest Rutherford and his fellow scientist created an experiment in which they bombarded very thin sheets of gold foil with fast moving alpha particles. Alpha particles are a type of radioactive particles that are positively charged. During their time, the current atomic model showed that an atom’s mass and charge are uniformly distributed throughout the atom. Using that model, they expected that the alpha particles would pass through the gold foil with slight deflection or even none at all. While the experiment did show that they were undeflected, they were surprised to see that a small amount bounced of the the foil a large angles.

This experiment led Rutherford to conclude that the particles that were highly deflected must have experienced powerful enough force within the atom to be deflected. He concluded that all of the positive charges and the majority of the mass of the atom must be condensed in a very small space in the atom’s interior, which he called the nucleus.  In the nuclear model, the proton and  neutrons are in the nucleus, the center of the atom. Electrons a distributed throughout the atom, orbiting the nucleus.

I hope you understand! :)

Ernest Rutherford's  model describes the atom as a tiny and dense with a positively charged core called a nucleus with neutral subatomic particles called neutrons. The model includes negative-charged subatomic particles called electrons that orbit the nucleus.

Ernest Rutherford and his fellow scientist created an experiment in which they bombarded very thin sheets of gold foil with fast moving alpha particles. Alpha particles are a type of radioactive particles that are positively charged. During their time, the current atomic model showed that an atom’s mass and charge are uniformly distributed throughout the atom. Using that model, they expected that the alpha particles would pass through the gold foil with slight deflection or even none at all. While the experiment did show that they were undeflected, they were surprised to see that a small amount bounced of the the foil a large angles.

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A dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.

A chemical reaction is the process by which substances called reactants are transformed to another substance known as products through the breaking up or building up of bonds between the reactants.

There are different types of chemicals reaction which includes condensation reaction.

Condensation reaction involves the combination of two smaller molecules known as monomers to for one larger molecule known as polymer with the loss of water molecule.

Condensation reaction is specifically called dehydration reaction due to the loss of water molecule that is involved.

Therefore, a dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.

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Answer:

46860.8 joules of heat

Explanation:

Use the formula ΔQ = mcΔT

ΔQ = gain or loss of heat (in joules)

M = mass (in grams),

C = specific heat (in J/g°C)

ΔT = change in temperature (in °C)

Substitute the known values into the formula:

ΔQ = (320.0 g)(4.184 J/g°C)(35.0˚C)

ΔQ = 46860.8 J

The statement that best describes the main function of the digestive system is to break down and absorb food, option (D) is correct.

When we eat, our food must be broken down into smaller molecules so that our bodies can absorb the nutrients we need for energy, growth, and repair. The digestive system is responsible for this process, which begins in the mouth with chewing and continues through the esophagus, stomach, small intestine, and large intestine.

In addition to breaking down food, the digestive system also plays a role in eliminating waste products from the body. The large intestine absorbs water and electrolytes from undigested food, while the rectum and anus eliminate solid waste from the body, option (D) is correct.

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The complete question is:

Which of the following best describes the main function of the digestive system?

A To provide an external boundary for the body

B To transport oxygen to body cells while removing waste

C To send and receive chemical messages

D To break down and absorb food

Answer:

Ammonium lauryl sulfate, like any other surfactant, makes a good base for cleansers because of the way it disrupts the hydrogen bonding in water. Hydrogen bonding is the primary contributor to the high surface tension of water. In hydrogen bonding with the water surrounding them.

Answer:

don't know

Explanation:

try it your self

try it your self

try it your self

try it your self

try it your self

try it your self

Good nucleophiles and powerful bases are organometallic reagents. Since they contain a link between a metal and a nonmetal, organometallic reagents are ionic.

Chemicals with carbon-metal linkages are called organometallic reagents. Only compounds where M = Li or Mg will be taken into consideration for the sake of the discussion that follows. A substance is referred to be an organolithium reagent when M=Li. Grignard reagents are what you get when M = Mg.

An organic molecule's carbon atom is bonded to at least one metallic element through an organometallic complex, which is a type of chemical compound. In some industrial chemical reactions, organometallic compounds made of metalloid elements including silicon, tin, and boron are employed.

Traditional definitions of organometallic compounds include those with bonds between one or more metal atoms and one or more carbon atoms of an organyl group. By prefixing the metal with "organo-," organometallic compounds are categorised (e.g., organopalladium compounds).

Therefore, the correct answer is option

A. Organometallic reagents are good nucleophiles and strong bases.

B. Organometallic reagents are ionic since they contain a bond between a metal and a nonmetal.

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In order to find the answer we need to set the equation up first, so the reaction for photosynthesis is:

6 CO2 + 6 H2O + energy -> C6H12O6 + 6 O2

Now by checking the molar ratio between water and glucose we see that for every 6 moles of H2O we will end up having 1 mol of C6H12O6, so we have a 6:1 molar ratio, now in order to produce 0.500 we will find out by doing the following calculation:

6 H2O = 1 C6H12O6

x H2O = 0.500 C6H12O6

x = 3.00 moles of H2O are needed to produce 0.500 moles of glucose

The partial pressure of carbon dioxide gas in the collected sample is 709 mmHg, and the fraction of the mixture that is CO2 is 0.974 or about 97.4%.

The method used to find the density of carbon dioxide gas is by collecting the gas by displacing water in a bottle.

To find the partial pressure of carbon dioxide gas in the collected sample, we need to subtract the partial pressure of water vapor from the total pressure of the mixture:

Partial pressure of CO2 = Total pressure - Partial pressure of water vapor

Partial pressure of CO2 = 730 mmHg - 21 mmHg

Partial pressure of CO2 = 709 mmHg

To find the fraction of the mixture that is CO2, we need to use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Assuming that the volume of the sample is constant and that the temperature is constant at room temperature (around 298 K), we can simplify the ideal gas law to:

P = nRT/V

Since the pressure of the mixture is equal to the sum of the partial pressures of the gases, we can write:

P(total) = P(CO2) + P(H2O)

Solving for n/V for carbon dioxide, we get:

n/V(CO2) = P(CO2)/RT

Substituting the values we have

n/V(CO2) = (709 mmHg)/(0.0821 L atm/K mol x 298 K)

n/V(CO2) = 0.0285 mol/L

Now, we need to find the total number of moles in the sample. We can do this by using the ideal gas law again, this time for water vapor:

P(H2O) = n(H2O)RT/V

Solving for n/V(H2O), we get:

n/V(H2O) = P(H2O)/(RT)

Substituting the values we have:

n/V(H2O) = (21 mmHg)/(0.0821 L atm/K mol x 298 K)

n/V(H2O) = 0.00083 mol/L

Since the volume of the sample is constant, the total number of moles is equal to the sum of the number of moles of CO2 and water vapor:

n(total) = n(CO2) + n(H2O)

Substituting the values we have:

n(total) = (0.0285 mol/L)(V) + (0.00083 mol/L)(V)

n(total) = (0.0293 mol/L)(V)

The fraction of the mixture that is CO2 is:

Fraction CO2 = n(CO2)/n(total)

Fraction CO2 = (0.0285 mol/L)(V)/(0.0293 mol/L)(V)

Fraction CO2 = 0.974

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Answer:

The first agrument.

Explanation:

Because only heat can be transfered. Thats why if you put something hot in a refridgerator the heat energy will go off in the fridge and powers the cold energy. Im pretty sure this is right this is what my teachers tought me so i hope they right

Since the exact values of the service times are not provided, it is not possible to calculate the 3-sigma control limits. Therefore, the correct answer is "None of the other options."

The 3-sigma control limits are used in statistical process control to determine the acceptable range of variation in a process. To calculate the 3-sigma control limits, we need to first find the mean and standard deviation of the service times for the 20 randomly selected customers.

Step 1: Find the mean (average) of the service times.
Add up all the service times and divide by the total number of customers (20).

Step 2: Find the standard deviation of the service times.
Calculate the difference between each service time and the mean, square each difference, sum up all the squared differences, divide by the total number of customers (20), and then take the square root of the result.

Step 3: Calculate the 3-sigma control limits.
Multiply the standard deviation by 3 and add/subtract the result to/from the mean. This will give you the upper and lower control limits.

Since the exact values of the service times are not provided, it is not possible to calculate the 3-sigma control limits. Therefore, the correct answer is "None of the other options."

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The ratio strength (w/v) of the diluted solution is 1:1000 or 0.1% w/v.

The original solution is a 1:20 w/v solution, which means that for every 1 gram of solute, there is 20 mL of solution. Using this information, we can calculate the amount of solute in the original 50 mL of solution:

1 gram / 20 mL = x grams / 50 mL

x = 2.5 grams of solute

When this 50 mL of solution is diluted to 1000 mL, the amount of solute remains the same, but the volume of the solution increases. The new ratio can be calculated by dividing the weight of the solute by the volume of the solution:

2.5 grams / 1000 mL = 0.0025 grams/mL

Converting this to a percentage w/v:

0.0025 grams/mL x 100 = 0.25% w/v

Therefore, the ratio strength is 1:1000 or 0.1% w/v.

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The symbol that goes in the gap is OH-. This is because the equation represents the reaction between the acid, \(HNO_{3}\)(nitric acid), and the alkali, NaOH (sodium hydroxide). The reaction between an acid and an alkali is known as a neutralization reaction and produces a salt and water. In this case, the salt produced is \(NaNO_{3}\)(sodium nitrate) and water, \(H_{2} O\). The reaction can be represented as follows:

\(HNO_{3}  + NaOH  -  NaNO_{3} + H_{2} O\)

The hydroxide ion, OH-, is a common component of alkalis and reacts with the hydrogen ion, H+, from the acid to form water. This neutralizes the acid and produces the salt. The balanced chemical equation for the reaction is:

\(HNO_{3}  + NaOH\) → \(NaNO_{3}  + H_{2} O\)

2H+ + 2OH- → \(2H_{2} O\)

Overall, the reaction involves the transfer of protons (H+) from the acid to the alkali, resulting in the formation of water and a salt. The symbol OH- represents the hydroxide ion, which is a key component of alkalis and plays a crucial role in the neutralization reaction with acids.

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Answer:

salad

Explanation:

Answer:

Explanation:

The number of carbon dioxide molecules can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 3.25 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer:

If there is a decrease in the amount of carbon dioxide or methane, the amount of energy leaving the Earth system increases, so less energy enters than exits. When less energy enters than exits, Earth's surface absorbs less energy.

Explanation:

The total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol is 300.0036 mL.

To calculate the total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol, multiply the volume of the liquor with the percent volume % (v/v):

Total volume of ethanol = Volume of liquor × % (v/v) ethanol

First, convert 25.4 fl. oz to mL.

1 fl. oz = 29.5735 mL

Therefore, 25.4 fl. oz = 25.4 × 29.5735 = 750.0089 mL

Using the formula above,

Total volume of ethanol = Volume of liquor × % (v/v) ethanol = 750.0089 mL × 40 / 100 = 300.0036 mL

Therefore, the total volume of ethanol in a standard 25.4 fl. oz (750 mL) bottle of liquor (e.g., whiskey, vodka, rum, etc.), which is typically 40% (v/v) ethanol is 300.0036 mL (approximately 300 mL).

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Answer: its D

Explanation: i just got the question right

In scientific notation, often known as power-of-10 notation, extremely big and small numbers are written. Scientists write very large numbers by express the numbers using scientific notation.

Numbers that are either too large or too little to be readily stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.

The main goal of scientific notation is to simplify computations using numbers that are abnormally big or tiny. The following examples demonstrate how all the digits in a number in scientific notation are relevant, since zeros are no longer utilized to set the decimal point.

When working with very big or very small numbers, scientists, mathematicians, and engineers employ scientific notation. Large and tiny numbers can be represented in a form that is simpler to read using exponential notation.

Thus, option D is correct.

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The thalidomide catastrophe led to stricter rules for medication approval in numerous nations. Thalidomide is a racemic combination of the (R)- and (S)-enantiomers and exists in two mirror-image forms. The (S)-isomer is teratogenic, whereas the (R)-enantiomer has sedative properties.

Enantiomer theory enters the picture at this point. The thalidomide molecule can be found in two different forms in nature, (R)-thalidomide and (S)-thalidomide, which are enantiomers, or molecules that are mirror images of one another.

While the (S)-form is a teratogen, an agent that can result in birth abnormalities, the (R)-form possesses therapeutic qualities.

Therefore, It is extremely difficult and dangerous to isolate pure (R)- thalidomide because the two enantiomers of the drug regularly interconvert in the body to create a mixture that contains both enantiomers.

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When pentanoyl chloride (CH3CH2CH2CH2COCl) is treated with a reagent, the products formed will depend on the specific reagent used. Since you did not provide the reagent in your question, I cannot give you the exact product(s) formed. However, I can provide you with a general outline of how to approach this type of problem:

1. Identify the reagent: Determine the reagent that you are using to treat pentanoyl chloride. Common reagents include alcohols, amines, water, and Grignard reagents.

2. Determine the reaction: Based on the reagent, determine the reaction that will take place with pentanoyl chloride. For example:
 a. Alcohol: Esterification
 b. Amine: Amide formation
 c. Water: Hydrolysis
 d. Grignard reagent: Ketone formation

3. Draw the product(s): Based on the reaction determined in step 2, draw the structure(s) of the product(s) formed.

Please provide the specific reagent, and I will be happy to help you determine the product(s) formed when pentanoyl chloride is treated with that reagent.

Answer:

wheres the options?

Explanation:

from google, so I think the answer to that question is the second one

The dissociation curve of hemoglobin is influenced by various factors, including the partial pressure of carbon dioxide, temperature, pH, and the presence of 2,3-DPG.

High partial pressure of carbon dioxide (CO2): An increase in the partial pressure of carbon dioxide shifts the dissociation curve to the right. This is known as the Bohr effect. Elevated CO2 levels indicate increased metabolic activity or higher levels of carbon dioxide produced during respiration. The shift to the right allows for more efficient release of oxygen from hemoglobin in tissues where oxygen demand is high.

Increasing temperature: An increase in temperature also shifts the dissociation curve to the right. Higher temperatures typically occur in metabolically active tissues, where oxygen demand is increased. The shift to the right enhances the unloading of oxygen from hemoglobin, facilitating oxygen delivery to the tissues.

Decreasing pH (acidic conditions): A decrease in pH, resulting in increased acidity (e.g., during exercise or in tissues with high metabolic rates), causes a rightward shift of the dissociation curve. This phenomenon is also known as the Bohr effect. The decrease in pH decreases the affinity of hemoglobin for oxygen, facilitating oxygen unloading in acidic environments.

Presence of 2,3-Diphosphoglycerate (2,3-DPG): 2,3-DPG is a molecule that is present in red blood cells and helps regulate the affinity of hemoglobin for oxygen. Higher levels of 2,3-DPG, which can occur in conditions such as chronic hypoxia or anemia, shift the dissociation curve to the right. This shift allows for more efficient unloading of oxygen from hemoglobin, ensuring that oxygen is delivered to tissues in need.

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The best estimate for the amount of energy released in this hypothetical nuclear decay process is approximately 1.503 x 10^-10 joules.

The amount of energy released in a nuclear decay process can be calculated using Einstein's famous equation:

E = mc^2

where E is the energy released, m is the mass that is transformed, and c is the speed of light.

In this hypothetical nuclear decay process, the mass of one proton is transformed into energy. The mass of a proton is approximately 1.0073 atomic mass units (amu) or 1.6726 x 10^-27 kg. Using this value for m, and the speed of light, c = 299,792,458 m/s, we can calculate the energy released:

E = (1.6726 x 10^-27 kg) x (299,792,458 m/s)^2

E = 1.503 x 10^-10 joules

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Answer:

I think the answer is, 100.

Explanation:

but i dont know try

The mass of magnesium is 11.551 g in 45.3 grams of mgcl2.

Sulfide and magnesium have molar weights of 32.065 g/mol and 24.305 g/mol, respectively. Step 2: Use the molar mass to translate mass into moles. The amount of magnesium sulfide in 12.5 grams is therefore 0.222 moles.

Now, the substance, magnesium chloride, is shown to us. Its chemical formula is MgCl2. While chlorine has an atomic mass of 35.5 u, magnesium has an atomic mass of 24 u. Consequently, 95 u is the magnesium chloride formula unit mass.

Molar mass of

Mg = 24.3 g/mol

Cl = 35.5 g/mol

Molar mass of \(Mgcl_{2}\)=24.3 g/mol+(2×35.5 g/mol)=95.2 g/mol

43.5g \(Mgcl_{2}\)=(24.3÷95.2)*43.5=11.551

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