4.0 mol Na2S can form 4.0 mol Na2SO4
and 5.0 mol CuSO4 can form
5.0 mol Na2SO4. How many moles of
Na2SO4 can form?
[?] mol Na₂SO4
Round your answer to the tenths place.

The energy released inside the alpha decay for 238 92u is 5.5862 MeV in this equation.

Energy can take on a variety of shapes. Examples of these include: electric power, sound energy, energy source, nuclear or atomic energy, light energy, generate heat, mechanical energy, gravity force, and so on. Each form has the potential to migrate or transform into the others. Because it's a basic human necessity, energy plays a major role in our daily lives. Our human-made structures are not only heated by energy, but also cooled by it.

The deterioration is spelled as ²³⁸Pu→²³⁴U+⁴He

Its energy released, or its Q value, is provided by

Q=[238.04955−234.04095−4.002603]c(2)u

=0.005997×931.5MeV

=5.5862 MeV.

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The number of moles of propane that reacts when 294g of carbondioxide forms is 2.23 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, propane gas undergoes a combustion reaction with oxygen to form carbondioxide and water as follows:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Based on the balanced equation above, 1 mole of propane is required to produce 3 moles of carbondioxide.

moles of carbondioxide = 294g ÷ 44g/mol = 6.68mol

moles of propane needed = 6.68 × ⅓ = 2.23moles

Therefore, 2.23 moles of propane is required to produce 294g of carbondioxide.

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Molecular solid is a covalent bond and  Ionic solid is an electronic bond.

We employ the octet rule, which states that all atoms in a compound are expected to comply by, to confirm the accuracy of any chemical structure. Every atom in the carbon IV oxide model precisely complies with the octet rule. The valence shell of each atom in the molecule is surrounded by eight electrons. We can therefore conclude that this structure is accurate given the total number of bonds and electrons, as well as the fact that CO2 has sixteen valence electrons.

Its negative charge, which is 1.602176634 coulombs, the basic unit of electric charge, is comparable to its own negative charge. The rest mass of an electron is 9.1093837015 10-31 kg, or 1/1,836 the mass of a proton.

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The two main elements that are found in ceramics are Oxygen and silicon.

Ceramics are extra than pottery and dishes: clay, tiles, glass, as well as cement are in all likelihood the best-regarded examples. Ceramic substances are utilized in electronics because, relying on their composition, they'll be semiconducting, superconducting, ferroelectric, or an insulator. They are hard wearing, resistant to high temperatures and good corrosion resistance.

Therefore, option d is the correct choice as the two main elements are silicon and oxygen.

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According to VSEPR theory the shape of the molecule is trigonal bipyramidal.

The VSEPR theory postulates that the shape of a molecule can be predicted by the electron pairs that surround the central atoms of the molecule. The valence shell electron pair repulsion (VSEPR) uses 3-D molecular geometry.

The VSEPR is a geometry that minimizes repulsion between electrons. The shape of the molecule is "trigonal bipyramidal" because of the presence of 2 single bonds in the X atom atom attached to the Y atom. The 5 main shapes of VSEPR are linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral.

The full question is:

A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule would take in three dimensions. From the given Lewis structure and what you know about VSEPR theory, identify the shape of the molecule. A molecule with atom Y single bonded with 2 X substituents. The Y atom has two lone pairs.

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Alloy is a substance formed from the combination of two or more metals. It can be combinations of other elements also. To determine the chemical composition of an alloy (or any metal) are X-ray fluorescence spectroscopy (XRF) and optical emission spectroscopy (OES) are the two main methods used.  

How to find weight composition of an alloy?

Given data

The composition of alloy is:

CAg=94.1%, Ag=0.941C

Ccu=5.9%, Cu=0.059C

The atomic weight of Ag is: WAg=107.87g/mol

The atomic weight of Cu is: WCu=63.55g/mol

The percentage composition for Ag.

PCAg=CAgWAgCAgWAg+CCuWCu×100PCAg=CAgWAgCAgWAg+CCuWCu×100

Substitute the given value.

PCAg=0.941×107.87g/mol0.941×107.87g/mol+0.059×63.55g/mol×100

=96.43%PCAg

=0.941×107.87g/mol0.941×107.87g/mol+0.059×63.55g/mol×100

Thus main answer is =96.43%

The percentage composition for Cu.

PCCu=CCuWCuCAgWAg+CCuWCu×100PCCu=CCuWCuCAgWAg+CCuWCu×100

Substitute the given value.

PCCu=0.059×63.55g/mol0.941×107.87g/mol+0.059×63.55g/mol×100

=3.56%PCCu

=0.059×63.55g/mol0.941×107.87g/mol+0.059×63.55g/mol×100

Thus, main answer is =3.56%

Thus, the percentage composition of Ag is 96.43%96.43% and percentage composition of Cu is 3.56%3.56%.

So, the option (b) is correct.

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We use for fuel are hydrocarbons that burn easily in the presence of oxygen, Hydrogen and Carbon elements are found in these substances. These fossil fuels are found in the Earth’s crust and contain carbon and hydrogen, which can be burned for energy.

What is fossil fuel?

Fossil fuel is a hydrocarbon-containing substance formed naturally in the Earth's scab from the escapes of dead plants and animals that is liquid and burned as fuel. The major fossil fuels are coal, oil, and natural gas.

What is energy?

Energy is the quantitative possession that is changed to a body or to a physical system, identifiable in the performance of work and in the form of heat and light.

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In part A, the statement that incorrectly describes air masses is option C, Polar air masses form far from the equator where air becomes cool as it loses energy to the cold land or water.

Part B, the option that does not apply to the weather change if a cold front moves into an area at a front is option C, Rain is unlikely.

When boundaries between air masses or cold fronts moves they cause changes to the weather, wind becomes gusty, heavy rain that sometimes come with hails and thunder as well as drop in temperature occurs.

Polar air masses are known to form only in areas with high latitudes and near the equator.

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lewis structure for Hydrogen cyanide (hcn)is H-C≡N:  is based electrons present in molecule

Step 1: Determine the total number of valence electrons. Step 2: Write the skeleton structure of the molecule. Step 3: Use two valence electrons to form each bond in the skeleton structure. Step 4: Try to satisfy the octets of the atoms by distributing the remaining valence electrons as nonbonding electrons. Hydrogen cyanide has linear molecular geometry with bond angles of 180 degrees. As hydrogen and nitrogen tend to be far from each other, hydrogen cyanide HCN forms a linear shape.A colorless, quickly lethal vapor or liquid with the odor of bitter almonds, hydrogen cyanide is very deadly.production are a few notable applications.The atom's negatively charged particles are called electrons.

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4-Dimethylaminopyridine is the extended form of DMAP in chemistry. It boils at a temperature of roughly 162 degrees Celsius. A very little over 122 g/mol is the molecular weight.

What is nucleophilic substitution reaction?

When an electron-rich nucleophile replaces a leaving group by coming into touch with a positively charged electrophile, the process is known as a nucleophilic substitution reaction.

Explanation:

Step 1: DMAP and acetic anhydride initially react in a state of pre-equilibrium.

Acetate and acetyl pyridinium ion pair are produced in the first step of the reaction. They both have high resonance stabilization.

Highly electronegative oxygen delocalizes in a structure with equal resonance energy.

Step 2:

DMAP is removed in the second stage when the alcohol that is present combines with the acyl carbon of the acetyl pyridinium to form the ester.

Acetate acts as a base to remove the proton from the alcohol by nucleophilically adding to the activated acyl pyridinium. The catalyst and the ester are produced as a result of the acetyl group's break with the catalyst. The resulting acetic acid will subsequently protonate the DMAP.

Step 3:

In the final stage of the catalytic cycle, the auxiliary base (unusual triethylamine Et N:or pyridine) deprotonated the protonate DMAP, reforming catalysis. The idea of a DMAP-dependent reaction rate is defined by catalepsies.

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16.1g mass of WO3 was used.

What is mass?

The quantity of matter in an object is expressed in terms of mass. Grams (g) or kilograms are commonly used to measure mass (kg). Regardless of the object's position in the universe or the gravitational field acting on it, mass measures the amount of matter present.

Weight and mass are frequently conflated terms. Although they measure various things, they are closely related. Weight measures the force of gravity acting on an object, as opposed to mass, which measures how much matter is there in an object.

An object's gravitational pull is determined by its mass as well as the gravitational field's strength. An object's mass and weight are exactly related if the force of gravity is held constant (which it is everywhere on Earth). Therefore, an object with a higher mass will likewise weigh more.

The mass of tungsten obtained (11.4 g) is 89.4% of the theoretical yield. Therefore, to calculate the mass of WO3 used, we need to divide 11.4 g by 0.894 to find the theoretical yield and then multiply it by 1.00 to find the mass of WO3 used.

Therefore, the mass of WO3 used = (11.4 g / 0.894) x 1.00 = 16.1 g

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Benzodiazepine is taken for GAD. The least likely description would likely to apply to Ingeborg’s reaction is: C. Therapeutic effects may be no stronger than those obtained with a placebo.

Both benzodiazepine and placebo could help in treating GAD and other panic disorders in adults. Their therapeutic effects include anxiety reduction, maintenance of sleep, seizure prevention, and muscle relaxation. However, many authors and researchers agree that benzodiazepines are more effective and have a stronger effect than placebo. Therefore, the correct answer is C.

This question seems incomplete. The complete options of the query are as follows:

“Ingeborg is taking a benzodiazepine for GAD. Which description is least likely to apply to Ingerborg’s reaction?

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When the temperature is 5 k and there are 2 molecules per cm3, the pressure is 1.38*1016 Nm2.

What degree of heat is too much for people?

People frequently cite a 2010 study that concluded that the highest limit of safety, above which the human body can no longer cool itself by draining sweat from the body's surface, would be a wet-bulb temperature of 35 C, or 95 F at 100% humidity or 115 F at 50% humidity.

Where on earth is it the hottest?

The world's hottest air temperature was recorded at Death Valley: Temperatures in the California desert's aptly called Furnace Creek region peaked on July 10th, 1913, at

Briefing:

P = nKT/V

 = 2*1.38*10⁻²³*5/10⁻⁶

 = 1.38*10⁻¹⁶ Nm⁻²

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The balanced chemical reaction for the complete neutralization between HNO₃ and Ba(OH)₂ is given as,

2 HNO₃ (aq) + Ba(OH)₂ (aq) → Ba(NO₃)₂ + 2 H₂O

Balanced equations

In order to balance the equation, the component atoms in the reactants and products must be the same in terms of number and mass.

Thus, in the above chemical equation, the number atoms of H, N, O, and Ba in the reactants and the products must be equal.

Therefore, the overall equation for the chemical reaction is,

2 HNO₃ (aq) + Ba(OH)₂ (aq) → Ba(NO₃)₂ + 2 H₂O

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Potassium is positively charged inside the cell, sodium is positively charged outside the cell, phosphate is negatively charged inside the cell, and chloride is negatively charged outside the cell.

Blood clotting, muscular movements, acid equilibrium, and fluid control can all be affected when your body is low on electrolytes. Electrolytes aid in the regulation of your heartbeat because your heartbeat is a muscle.

Drinks like isotonic drinks, milk, apple juice, other juice drinks can all help with electrolyte balance and hydration. For the majority of people, maintaining electrolyte levels only necessitates a well-balanced diet and enough water to drink.

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The carbonic hardness is 131.1475 mg/L, non carbonic hardness is 243.442 mg/L and total hardness is 345.833 mg/L.

Anions - they're shaped when non-metal profits the electrons. They benefit one or a couple of electron. consequently, they own a net poor price. a few examples of anions are Iodide (I–), chloride (Cl–), hydroxide (OH–).

Calculation:-

Total hardness - is sue to multivalent cations.

The multivalent cations in the given questions are Ca²+ and Mg ²+.

= 237.5 + 108.33

= 345.833 mg/L of CaCo3.

Carbonceous hardness - is due to HCO3-

Therefore carbonaceous = 160/60/1 (100/2) as CaCO3

= 131.1475 mg/L

Non carbonaceous hardness - is due ti cl- and SO4- anions.

= 135/96/2 × 100/2

= 243.442 mg/L as CaCo3.

Carbonate is a polyatomic anion with the components CO2−3 and has a trigonal planar molecular shape which includes a carbon atom surrounded via 3 oxygen atoms. The carbonate ion is a reasonably sturdy base, so through definition of a Lewis base, it draws protons in aqueous solutions.

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The molarity of a 97.62 (m/m) % acetic acid solution given that the solution density is 1.05 g/ml is 17.5M.

Reason:

Glacial acetic acid is 100% acetic acid. The MW of acetic acid is 60. The density of acetic acid (100%) is 1.05. So in 1 L we have 1.05 Kg. The number of moles of acetic acid is then 1050 g divided by 60 = 17.5 mol. So the molarity is 17.5 mold/L or 17.5 M.

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The density of a gas with a molar mass of 28.011gmol at 281 k and 1.90 atm is 2.30 g/l or grams per liter.

The formula for the ideal gas constant is PV= nRT

[tex]\frac{P}{RT}= \frac{n}{V}[/tex] = molarity

[tex]\frac{n}{V}[/tex] = molarity

Using M = molar mass to multiply both sides, we obtain

[tex]\frac{PM}{RT} = \frac{nM}{V}[/tex]

We can write [tex]\frac{PM}{RT}[/tex]= ρ.......equation (i)

since density, ρ = [tex]\frac{mass}{volume}[/tex] and

density, ρ= [tex]molarity*molar mass (\frac{nM}{V})[/tex]

After plugging in all the numbers in equation (i), we get

ρ= [tex]\frac{ 1.90*28.011}{281*0.082}[/tex]

ρ= [tex]\frac{522090}{2304200}[/tex]

ρ= 2.30 g/l.

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The conversion factor that you will need to use is Avogadro's Number.

What is Avogadro's  number?

The number of units in a mole of any substance, which is determined by its molecular weight in grams, is equal to 6.02214076 1023. Depending on the composition of the substance and the characteristics of the reaction, the units may be electrons, atoms, ions, or molecules.

What is atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the central nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are relatively heavy particles, can be found in the positively charged nucleus.

Firstly, we will divide the given number of atoms by Avogadro's number to find the number of moles. After finding moles, we will multiply them with molar mass to find the weight of graphene containing given number of atoms.

Therefore, conversion factor that you will need to use is Avogadro's Number.

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It is acidic shampoo. Not basic, but in between acidic and neutral. Because basic shampoo would be harmful in this situation. The basic ph of soap is incorrect.

Once or twice will not harm your hair when you wash it with soap, but frequent washings with bar soap can lead to serious issues including roughness and severe tangles. Choose a shampoo instead to clean your hair. Dry shampoo is an excellent option for your hair if you wish to forgo shampoo.

You can wash your hair with soap, but if you're used to using liquid shampoo, the results will probably not be satisfactory.

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According to the statement you do every time you are setting up glassware for a vacuum filtration are:

1. Check that there are no cracks or defects in the glassware.

2. Ensure that the glassware is designed for use with a vacuum.

3. Inspect the tubing for any holes.

By removing the air beneath the filter paper, vacuum filtration maintains a pressure differential across the filter media. Filtration under a vacuum accelerates the process and exerts a force on the mixture in addition to gravity.

The collection of a particle (bacteria, precipitate, etc.) from with a liquid suspension typically involves vacuum filtration in microbiological and laboratory operations.

Vacuum and gravity filtering differ primarily in their efficiency and mode of operation. The filtration is powered by one technique, which employs a vacuum source, and by the other, which uses gravity. Vacuum filtering becomes quicker and more practical as a result. However, it doesn't apply to all experiments.

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When comparing the use of red cabbage indicator and phenolphthalein,  the one give more useful results is red cabbage indicator.

The red cabbage indicator is most useful . the red cabbage indicator gives different colors based on the solution whether it  is acidic solution , basic solution or neutral solution. the red cabbage indicate gives separate color for each the these different states. the red cabbage indicator contains the a chemical known as anthocyanin. the red cabbage give red or pink color when the solution is acidic. the  red cabbage indicator  give purple color when the solution is neutral. the  red cabbage indicator gives blue, green yellow color when the solution is basic.

Thus, the red cabbage indicator is more useful as compared to the phenolphthalein .

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To restore acid rain to its natural pH, Sulphur should be present in lower proportions in the atmosphere. Sulphur dioxide emissions mixed with nitrogen oxide emissions cause acid rain.

Both substances interact with airborne molecules including water, oxygen, and other molecules to produce this effect. Particularly when it comes to aquatic life, this phenomena is exceedingly hazardous for both people and other animals and plants. For example, the elevated pH prevents several kinds of freshwater fish from developing or growing. When the pH is even lower, however, in some situations, the organisms are unable to survive and eventually perish. Therefore, a decrease in atmospheric Sulphur concentrations could lessen acid rain and bring rain back to its normal pH in the atmosphere.

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Both Na and K use passive diffusion across the plasma membrane to leak channels.

The plasma membrane, also known as the cell membrane, is the membrane that separates the interior of a cell from its external environment. It may be found in all types of cells. A cell wall connects the plasma membrane to the outside of both bacterial and plant cells. The plasma membrane protects the cell from its surroundings while simultaneously controlling cellular mobility and sending signals. The plasma membrane, according to the fluid mosaic model, is a patchwork of phospholipids. Non-gated ion channels are ones that are always open. Because they simply allow ions to pass through the channel without causing any damage.

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These are the nuclear reactions of the unstable nuclide.

What is nuclear equation?

An equation that specifies the nuclides involved in the reaction, their mass numbers and atomic numbers, as well as the other particles involved in the reaction, is used to describe nuclear reactions.

What is unstable nuclide?

In their valence shell, they have two or eight electrons. They don't acquire, shed, or share electrons.

The ratio of the number of neutrons (N)

to the number of protons (Z)

determines the most likely mode of decay. The atomic number of an atom is represented as the number of protons (Z)

The difference between mass number(A)

and atomic number is represented as the number of neutrons(N). According to the (N/z)

value, the type of decay can be identified.

The nuclear stability belt is drawn between the number of neutrons taking at the y- axis and number of protons at the x- axis. Those lying above or below the belt are unstable nuclides while those lying at the belt are stable nuclides. This belt helps to determine the type of decay that occurs in a species, whether it is alpha decay, beta decay, positron decay or electron capture.

Number of protons (Z)= atomic number

Number of  neutrons (N) = mass number(A)-  atomic number(z)

If (N/z)

value is greater than 1, then it undergoes β decay. This is because the element has more neutrons and it can tend to convert into a proton by beta decay. The daughter nucleus produced from this decay has increased the atomic number by 1 unit compared to the parent nuclei and there is no change in the mass number.

X= parent nucleus

Y= daughter nucleus

If  (N/z)

value is less than 1, then it undergoes positron emission. This is because the element has less neutrons and it cannot tend to convert into a proton. Therefore, it undergoes positron emission in which the daughter nucleus produced from this decay has decreased the atomic number by 1 unit compared to parent nuclei and there is no change in the mass number.

X= parent nucleus

Y= daughter nucleus

If  (N/z)

ratio is too low with greater than atomic number of 82, there are too many protons and the nuclide will undergo alpha decay. The alpha decay for any element X is shown below.

A               A-4               4

       X                    Y+         a

Z                Z-2                2

The most likely mode of decay for the given unstable nuclide is as follows.

Therefore, these are the nuclear reactions of the unstable nuclide.

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Aqueous solutions of sodium sulfate ( Na₂SO₄ ) and barium chloride are mixed, then the precipitate formed is barium sulphate ( BaSO₄ ). Therefore, option 4 is correct.

The inorganic substance having the chemical formula BaSO4 is called barium sulfate. It is a tasteless, crystalline white substance that is insoluble in water. The main commercial source of barium and the materials made from it is the mineral barite, which is where it naturally occurs.

Barium sulfate and sodium chloride are created when barium chloride (BaCl2) and sodium sulfate (Na2SO4) react. The above-mentioned reaction produces a white precipitate as a result of the creation of barium sulphate.

Thus, option 4 is correct,

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The number of kilowatt-hours of electricity required to produce 4.60kg of metallic sodium from the electrolysis of molten NaCl(s) is 3.13 kWh when the applied emf is 4.50V

An equation for the reaction can be given as follows;

[tex]Na^{+} + e^{-} ---- > Na (s)[/tex]

Hence, the moles of Na is equal to the moles of electron used

Therefore, we can calculate the number of moles of sodium as follows;

No of moles = mass ÷ molar mass

No of moles = 4600 g ÷ 23 g/mol     (As 1 kg = 1000 g)

No of moles =  200 mol

As Q = n × F;  where F represents  Faraday's constant

Q = 200 mol × 96500 C

Q = 19,300,000 mol C

The relation between electrical energy and Q is as follows;

E = Q × V

Now we can substitute the given values into the above formula and then calculate the value of electricity as follows;

E = 19,300,000 × 4.50

E = 86,850,000 J

As 1 J = 2.77 × 10^-7 kWh

Therefore;

86,850,000 ÷ 2.77 × 10^-7  kWh = 3.13 kWh

Hence, we can conclude that 3.13 kilowatt-hours of electricity is required to produce 4.60kg of metallic sodium from the electrolysis of molten NaCl(s)

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it false john weighs 85 pounds. jeff weighs 105 pounds. jake weighs 115 pounds. two of them standing together on the same scale could weigh 200 pounds.

A pounds is defined as 16 ounces, 7,000 grains (or 0.45359237 kg) of avoirdupois weight and 12 ounces, 5,760 grains (or 0.37324171216 kg) of troy and apothecaries' weight. The letter lb comes from the Roman libra, which was the forerunner of the modern pound. The pound, also known as pound-mass, is a unit of mass that is used in both the British imperial and American customary measurement systems.

Balance Analytical These are most frequently discovered in laboratories or other locations where weighing items requires a high level of sensitivity. In analytical balances, mass is measured. Chemical analysis is always based on mass, so the results are never based on localized gravity, which would have an impact on the weight.

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Its pressure distribution (in kpa) for 65 °C is P=13.32atm after 18.7 l n2 with 41. 9 l o2 and 25 °C and 125 kpa was transported to a container with such a capacity of 7. 00 l.

A physical force applied to an object is known to as pressure. For unit area, a perpendicular force is delivered to a surface of the objects. T r is the fundamental formula for pressure. Phases of project are a unit of pressure (Pa). Absolute, ambient, differential, and gauge pressures are different types of pressure.

That number of molecules of N2 is now determined,

P₁.V₁=n₁.R.T₁

1.233×18. 7=n₁×0.0821×298

n₁=0.822 mol

In a similar manner, we determine the quantity of O2 moles.

P₂.V₂=n₂.R.T₂

1.233×41. 9=n₁×0.0821×298

n₂=1.628mol

The total number of moles of gas that must be pumped into the vessel with the dimensions of V = 4.50 L and T = 298 K equals

n=n₁+n₂

=0.822+1.628mol

=2.45mol

Let P represent the gas's final pressure,

PV=nRT

P×4.50=2.45×0.0821×298

P=13.32atm

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Answer:

650cm

Explanation:

1m = 100cm

6.50m = 650cm