The barometer at an indoor pool reads 105.00 kPa. If the temperature in the room is 26c, what is the patial pressure of the "dry" air??
a. 30.88 kPa
b. 101.60 kPa
c. 108.40 kPa
d. 357.00 kPa

Answer:

Indian culture is the heritage of social norms, ethical values, traditional customs, belief systems, political systems, artifacts and technologies that originated in or are associated with the Indian subcontinent.

IN SIMPLE WORDS: The culture of India refers to a collection of minor unique cultures. The culture of India comprises of clothing, festivals, languages, religions, music, dance, architecture, food, and art in India. Most noteworthy, Indian culture has been influenced by several foreign cultures throughout its history.

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Explanation:

Answer:

Indian culture is the heritage of social norms, ethical values, traditional customs, belief systems, political systems, artifacts and technologies that originated in or are associated with the Indian subcontinent.

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In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

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T he H2 + CH2=CH2-------- CH3CH3 is the reducing and oxidizing agents .

What is reducing agents?

The electron donor is a reducing substance, which is usually in one of its lower oxidation states. Because it gives up electrons in the redox reaction, a reducing agent becomes oxidized. The earth metals, formic acid, and sulfite compounds are a few examples of reducing agents.

What is oxidizing agents?

A substance or element that participates in an oxidation-reduction (redox) reaction and receives electrons from a separate species is known as an oxidizing agent. An oxidant is a chemical molecule that readily exchanges oxygen or other material atoms for an electron.

Therefore,  H2 + CH2=CH2-------- CH3CH3 is the reducing and oxidizing agents.

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Answer:

B. Coal

Explanation: Coal is mined to produce energy.

11.) Non polar, equally, Charged.

12.) Ionic, Cation, Positive, anion, negative

13.) electronegative, Polar

14.) So

15. weak, HCl or N2

A covalent bond between C and H is Non Polar. It is called that,because electrons are shared Equally between these two atoms.C and H,are not Charged

12. An Ionic bond is formed when an electron is transferred from one atom to another.

The atom that loses an electron is called Cation and has charge positive. The

atom that gains an electron is called anion and has negative charge.

13. A hydrogen bond is formed between a H in one molecule and an Electronegative atom in

another molecule. The H can make an H-bond only if it is found in a Polar covalent

bond, in its own molecule.

H-bonds give So many of its special properties.

A van der Waals interaction is the Weak type of bond. All molecules form these

bonds. These interactions become important when found in great numbers. The often help the

3D shape of large molecules such as HCL or N2

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Answer:

arms

Explanation:

because arms can be metric system of our body

Answer:

nose and the tip of an outstretched middle finger.

Ph 2 will ahve more strength due to the fact that its more acidic compared to pH 5.

the lower the number of a pH, the more it is heading towards being acidic, but the higher the number, the more it heads towards being an alkali. here is a ppt i made along time ago. hope it can help you . have a nice day

Answer:

Altaïr is an ancestor (on the maternal side) of Desmond Miles, a modern-day assassin. He was trained in the Masyaf Castle in Syria by Al Mualim, his guardian since childhood.

Explanation:

In comparison to modern, highly accurate density meters or pycnometers, hydrometers are far less accurate and temperature.

Thus,  Although they require very large sample sizes, hydrometers are rather simple to operate. Usually, 300 to 500 ml per measurement are required. Hydrometers frequently require calibration off-site as well.

With measurements taken by eye, user error is a major issue, and temperature management is especially challenging. Inaccurately bringing and maintaining samples at temperature might take a long time, and once more, user perception of temperature levels is used to determine temperature levels.

Pycnometers and hydrometers have a further problem in that the findings of alcohol measurement are challenging to evaluate and record.

Thus, In comparison to modern, highly accurate density meters or pycnometers, hydrometers are far less accurate and temperature.

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As you can see the picture, in the three given compounds i.e. ethane, ethene and ethyne, ethyne have shortest bond. Bond length of ethyne is very short when compared to the ethane and ethene. Shorter the bond, bond strength will be more. Hence, our answer is ethyne.

Answer:

ethyne has shortest bond

The nonessential saturated fatty acid with four double bonds is called Palmitoleic Acid, and its structural formula is CH₃(CH₂)₅CH=CH(CH₂)₇COOH. Its IUPAC name is (Z)-hexadec-9-enoic acid.

Nonessential saturated fatty acids are fatty acids that can be synthesized by the human body and are not required to be obtained from the diet. The human body has the ability to produce these fatty acids through de novo synthesis.

The structure of a nonessential saturated fatty acid with four double bonds is as follows:

Name: Palmitoleic Acid

Structural Formula: CH₃(CH₂)₅CH=CH(CH₂)₇COOH

IUPAC Name: (Z)-hexadec-9-enoic acid

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If the efficiency of a machine increases, it means that the machine is able to convert a higher percentage of its input energy into useful work output.

This could happen due to various factors, such as reducing friction, improving the design of the machine, or using more efficient components. The machine requires less energy input to perform the same amount of work. This could result in cost savings, reduced energy consumption, and lower environmental impact.

The output of the machine increases while the input remains constant. This could result in increased productivity, faster production rates, and improved performance. The wear and tear on the machine may decrease, as it is working more efficiently and experiencing less stress. This could result in longer machine life and reduced maintenance costs. Increasing the efficiency of a machine can have many positive effects, including cost savings, improved performance, and reduced environmental impact.

The complete question is

If the efficiency of a machine increases, what happen?

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The heat of formation, or enthalpy of formation, of a compound, can be found in a reference such as the appendix of a textbook or a thermochemistry table. The heat of the formation of Fe2O3(s) is -824 kJ/mol. It represents the heat change that occurs when one mole of Fe2O3 is formed from its elements under standard state conditions. So the answer is 824 kJ will be released.

The heat of formation, also known as enthalpy of formation, is the heat energy change that occurs when a substance is formed from its element under standard state conditions. It is usually expressed in kJ/mol.

When we are dealing with the combustion of a substance, this value is used to determine how much heat is released or absorbed in the process. In this case, the substance is iron and we need to form Fe2O3.

To find the amount of heat released, we can use the heat of formation value of Fe2O3, which is -824 kJ/mol.

Since the value is negative, this means that 824 kJ of heat is released when 1 mole of Fe is burned to form Fe2O3 under standard state conditions.

It is also important to note that these values are usually provided at a specific temperature, usually at 25 degrees Celsius, and standard pressure.

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Answer:

The balanced equation for the reaction of NH3 and O2 is: 4 NH3 + 5 O2 -> 4 NO + 6 H2O.

From the balanced equation, it can be determined that for every 4 moles of NH3, 5 moles of O2 are needed to react.

To convert 14.8 g of NH3 to moles, the following calculation can be used: 14.8 g NH3 / 17.03 g/mol = 0.87 moles NH3.

Therefore, the number of moles of O2 needed to react with 14.8 g of NH3 is: 0.87 moles NH3 * (5 moles O2 / 4 moles NH3) = 1.09 moles O2.

To convert moles of a substance to grams, the following calculation can be used: moles x molar mass (in g/mol)

Therefore, the number of grams of O2 needed to react with 14.8 g of NH3 is: 1.09 moles O2 * (32.00 g/mol) = 35.1 g O2

Answer:

16.85 K

Explanation:

-256.3°C + 273.15 = 16.85K

The values of Δs for the water, the surroundings, and the universe for the evaporation of water from an open pan at 25°c is Positive, Negative, Positive.

What is spontaneous process?

A spontaneous process in thermodynamics is one that happens without the system receiving any outside input.

According to the second law, a spontaneous process,

ΔS\(universe > 0\)

As it transitions from a liquid to a gaseous form, water. Entropy changes in favor whenever a phase transition occurs from a liquid to a gas,

So ΔS \(water > 0\)

The amount of thermal energy required to cause water to evaporate is determined by multiplying the molar enthalpy of vaporization by the amount of evaporating water in moles. The surrounding provides this thermal energy,

So Δq \(surroundings < 0\).

We know that: As long as this thermal energy is transferred reversibly,

\(Delta S surr = Delta q surr/T\)

T is always positive since it is being measured in kelvins, which is the thermodynamic scale. The fact that

\(Delta q surr < 0 so Delta S surr < 0.\)

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Answer:

The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion.

Explanation:

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A radioactive source's half-life is 8 hours if 60 g of it drops voluntarily to 15 g in 16 hours.

The number of protons in the atomic nuclei of the constituent atoms of a given chemical is constant, whereas the number of neutrons changes. Radioisotopes are the name for an element's radioactive constituents. They can also be referred to as unstable neutron-proton pairings or atoms with too much electrical energy in their nucleus. The Contributes to the continuing (Bq), the international unit, or the Cobalt (Ci), the official machine in the United States, are used to report actual radiation levels.

Complete life divided by half.

Half-life equals 16/2

8 hours is the half-life.

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Answer:

1.) 2H2 + O2=2H2O

2.)Cl2 + 2KBr= 2KCl + Br2

4.)C4H12 + 7O2= 6H2O + 4 CO2

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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After 2 half-lives there will be 25% (1/4th) of the original isotope, and 75% (3/4 th) of the decay product

A half life is a measurement of the slope of an exponential decay function.

It is also defined as, the time it takes to halve the concentration of something in a process.

Each half life you will have half of what you had at the beginning of a given half life.

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The representation is showing potassium atom (K) and Chlorine atom (Cl) when it ought to show their ions i.e potassium ion (K⁺) and Chlorine ion (Cl¯)

When potassium chloride, KCl dissolves in water, it dissociate to produce potassium ion (K⁺) and Chlorine ion (Cl¯) as shown below:

KCl(aq) —> K⁺(aq) + Cl¯(aq)

The representation given in the question is only showing potassium atom (K) and Chlorine atom (Cl). This makes it wrong as dissolution of ionic compounds in water will results in the corresponding ions of the element that makes up the compound

Please see attached photo

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This problem is providing the average speed at which an argon atom moves at 25 °C and asks for the average wavelength it exhibits. At the end, the answer turns out to be 23.15 pm.

In chemistry, when analyzing the wavelength of objects or substances, one can use the Broglie's wavelength formula in order to relate the average speed, mass and wavelength with:

\(\lambda = \frac{h}{mv}\)

Where h stands for the Planck's constant, m for the mass and v for the average speed. Now, since an argon atom has a mass of 39.948 amu

and 1 amu = 1.6605 x10⁻²⁷ kg, one can plug in these numbers to obtain:

\(\lambda = \frac{6.626x10^{-34}kg*\frac{m^2}{s} }{39.948amu*\frac{1.6605x10^{-27}kg}{1amu}*431.5\frac{m}{s} }\\\\\lambda=2.315x10^{-11}m*\frac{1x10^{12}pm}{1m}\\ \\\lambda=23.15pm\)

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Answer:

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.

Explanation:

The required tubular length for 99.9% conversion is 116.84 meters.

On Earth, the rate at which cyclohexane reacts with benzene and methylcyclopentane is constrained by high mass transfer.

A tubular reactor with an internal diameter of 5 cm and a length of 20 m will be used to conduct the reaction, and cylindrical pellets with dimensions of 0.5 cm in diameter and 0.5 cm in length will be placed within the reactor's pipes.

Only the exterior surface of the pellets are coated.

The packed bed has a 40% porosity and a 60 dm3/min intake flow rate.

When the intake gas stream includes 5% cyclohexane and 95% hydrogen at 2 atm and 500°C, the tubular length vs. conversion graph should be drawn.

The graph may be used to identify the minimum length of tube necessary for 99.9% conversion.

For cyclohexane diffusion in hydrogen, the Fuller, Schettler, and Giddings Correlation is as follows:

a = 0.8854,

b = 1.764102,

C = 6.0231023.

The tube length vs. conversion graph may be displayed at 2 atm and 500°C when the incoming gas stream includes 5% cyclohexane and 95% hydrogen.

The following equation may be used to determine the rate of reaction:

ra=2.31011 exp[-88580/RT]C_A(1X)/3

The mole balancing equation for an isothermal tubular reactor is given as

dX/dL = -ra/C A,

where X is the conversion and L is the length.

To determine the length of the tubular reactor needed for a specific conversion X, we can integrate the aforementioned equation from X = 0 to X = X.

We must numerically calculate the following equation to obtain the necessary tube length for 99.9% conversion:

∫0.999L0−ra/CA 

dL=0.999XEq L 

for X=0.999

After rearranging the equation above, we get:

0.999L0ra/CA

dL=XX Eq

The aforementioned equation is integrated to give us

L = 116.84 m.

Therefore, the required tubular length for 99.9% conversion is 116.84 meters.

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Answer:

C

Explanation:

Well Its called reaction force,  so that helps you figure out what direction she would go towards. When you use anything that has reaction force what way are they normally going? So thats why she stayed still.

1. It is also known as the dark reaction of photosynthesis: Off.

2. Primary acceptor of carbon is Photosystem I and II: On.

3. Site of the process is in the stroma: Off.

4. Photolysis of water does not occur: Off.

5. Process type is both cyclic and non-cyclic processes: On.

6. It is a release of oxygen that gives off aldehydes and hydrogen upon dehydrogenation: On.

7. It is a process that converts solar energy into chemical energy: On.

8. It is a light dependent process: On.

9. Process type is cyclic only: Off.

10. Primary acceptor of carbon is Rubiscobisphosphate: Off.

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The number of volume of the oxygen that would be consumed is 2.8 L.

Let us recall that what we have here is the process of the use of the stoichiometry of the reaction so as to be able to obtain the mass and the volume of the reactants that are taking place in the reaction as we are going to have in the case that is at hand.

What we now need to do so that we can be able to use the stoichiometry of the reaction would just be to write down the equation of the reaction and this is going to give us the reaction; \(2Mg(s) + O_{2} (g) ---- > 2MgO\).

In this case we know that;

Number of moles of the magnesium = 6g/24 g/mol

= 0.25 moles

Now we know that;

If 2 moles of the magnesium reacts with 1 mole of the oxygen then

0.25 moles of the magnesium would react with 0.25 * 1 /2

= 0.125 moles

Volume of oxygen that is consumed is; 0.125 moles * 22.4 L
=2.8 L

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Answer:

24,901 x 1609.34 = 40074275

40074275/100 equals

400742.75 s

divided by 3600

111.31

Explanation: