A temperature of 15 oc a quantity of oxygen has a volume of 250ml if it’s perature is raised 45 oc what will be it’s volume

Answer:

1. C.3

2. A. Continental shelf

Explanation:

Ocean water contains about 3% salt

When you are at the beach, you are playing in the sand of the Continental Shelf

Answer: Nitrogen, Oxygen, Argon, Helium and Neon are elements.

Explanation:

The main components of air are:

Nitrogen (78%)

Oxygen (21%)

Carbon dioxide (0. 04%)

Argon (0. 93%)

Trace amounts of helium, neon, methane, hydrogen and water vapour.

Out of all these components here, Nitrogen, Oxygen, Argon, Helium and Neon are elements. We can tell that because element is a chemical substance that cannot be broken down into other substances, and here we can see that unlike methane(CH₄), Carbor dioxide (CO₂) or water vapor(H₂O) , these elements cannot be broken down into anything simpler.

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The work done here  on throwing the ball straight upwards to a height of 4 m is the change in its potential energy. Hence, here the change in potential energy is 6.66 J.

Work done is a physical quantity that measures the how much the force is effective in making a displacement. Hence it is the product of force and displacement.

The work done in bringing an object from one place to the other is called its potential energy. Here, the work done on throwing the ball straight upwards tp a height of 4 m is equal to its potential energy at this height.

Potential energy = mgh

g = 9.8 m/s²

m = 0.170 kg

h = 4 m

p =  9.8 m/s² × 4 m × 0.170 kg = 6.66 J.

Therefore, the work done in throwing the ball is 6.66 J.

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a. The dissolution process is endothermic.The entropy of solution is likely highly positive.the temperature of the solution quickly drops.

Endothermic is a type of chemical process in which energy is absorbed from the surroundings in order to cause a reaction. A common example of an endothermic reaction is the dissolution of anhydrous ammonia in water. When this happens, the reaction absorbs energy from the surrounding environment in the form of heat. This is because the ammonia molecules need to break apart in order to dissolve in the water. It is also possible for reactions to be endothermic without the need to absorb heat; in this case, the reaction absorbs energy from the environment in the form of light or electricity. Endothermic reactions can be used to create energy efficient products such as insulation, air conditioners, and refrigerators. In addition, endothermic reactions are used in many industrial processes.

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The water in a garden hose flows at a rate of 10.0 liters per minute. Therefore, 158 gal/hr is the flow rate in gallons per hour.

Flow rate is the amount of liquid that travels in a given length of time. Furthermore, the flow rate is affected by the channel through which the liquid is travelling, the area of the pipe, as well as the velocity of something like the liquid. Furthermore, the formula is. Fluid dynamic rate = pipe or channel area x liquid velocity.

The volume flow value is the rate of liquid (water flow rate formula) passing through every place in an area over time.

1 gal = 3.79 L

60 min = 1 hr

10.0 L/min x 60 min/hr x 1 gal/3.79 L = 158 gal/hr

Therefore, 158 gal/hr is the flow rate in gallons per hour.

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Answer:

All of the industries listed can provide jobs and boost the economy through product sales and advertising. However, "Communications" and "Electronics" are particularly noted for their significant impact in providing jobs and boosting the economy through product sales and advertising. The communications industry includes the telecommunications and media sectors, which generate revenue through product sales and advertising. The electronics industry is a major contributor to the global economy, with products such as smartphones, laptops, and other electronics driving product sales and generating revenue through advertising.

"Tourism" is another industry that can contribute to job creation and economic growth through product sales and advertising, as it involves the sale of travel-related products and services and can generate significant revenue through advertising.

"Oil and Gas" is also an important industry that can provide jobs and boost the economy through product sales and revenue generated from the production and sale of oil and gas products.

The flow of water in a pipe and the flow of electrons in a wire are both examples of fluid flow and are caused by different physical phenomena.

The flow of water in a pipe is caused by a pressure difference, also known as a pressure gradient, between two points. If the pressure at one end of the pipe is higher than the pressure at the other end, water will flow from the high-pressure end to the low-pressure end. The flow rate will depend on the pressure difference, the diameter of the pipe, and the viscosity of the fluid.

The flow of electrons in a wire, on the other hand, is caused by a difference in electrical potential, also known as a voltage difference, between two points. If the voltage at one end of the wire is higher than the voltage at the other end, electrons will flow from the high-voltage end to the low-voltage end. The flow rate will depend on the voltage difference, the resistance of the wire, and the number of electrons available to flow.

In summary, the cause of the flow of water in a pipe is a pressure difference, while the cause of the flow of electrons in a wire is a voltage difference.

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The volume of the solution is 2600 L

The first step is to determine how much solute you need to dissolve in the solvent. This will depend on the desired concentration of the solution and the volume of solvent you plan to use then measure the amount of solute needed for the solution. Be sure to use the correct units of measurement.

We know that;

Number of moles of the NaCl = 30.2 g/58.5 g/mol

= 0.52 moles

Now;

Number of Moles = Concentration * volume

Volume = Number of moles/Concentration

= 0.52 moles/0.200 M

= 2.6 L or 2600 mL

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Electron capture is the process where the number of protons in a nuclide is decreased while the mass number remains constant.

What is the process of electron capture?

During electron capture, an electron in an atom's inner shell is drawn into the nucleus where it combines with a proton, forming a neutron and a neutrino. The neutrino is ejected from the atom's nucleus. Since an atom loses a proton during electron capture, it changes from one element to another.

What happens to the mass number during electron capture?

Following electron capture, the atomic number is reduced by one, the neutron number is increased by one, and there is no change in mass number.

Why does electron capture decrease atomic number?

When a nucleus captures an electron, a proton changes into a neutron, and an electron-type neutrino is emitted. The atomic number goes down by one unit, accounting for the loss of a proton, and the total number of protons plus neutrons stays unchanged, accounting for the gain of a neutron.

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The balanced equation is; 2MnO2 + 3H2O2 + 2OH − →2MnO4− +4H2O

A balanced chemical equation is a chemical equation in which the number of atoms of each element is equal on both sides of the equation. This means that the same number of atoms of each element are involved in the reactants (the starting materials) and the products (the substances formed).

Balancing a chemical equation ensures that the law of conservation of mass is obeyed, as the total mass of the reactants must equal the total mass of the products.

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Answer:

The wavelength of the wave in the diagram is 6 meters. This can be calculated by measuring the distance between points A and B and dividing it by the number of waves. In this case, there is one wave, so the wavelength is equal to the distance between points A and B, which is 6 meters.

The moles of Cl atoms in 0.0395 g of C₂H₄Cl₂ is  1.28 x10⁻⁴ There are two chlorine atoms in a mole of chlorine. since chlorine has two atoms.

1 mole of C₂H₄Cl₂ has 2 Cl atoms per 99g, or x moles,

                                    n = (0.0649/99).

You would get the number of Cl atoms in 0.0649 g of C₂H₄Cl₂ by multiplying by 2x.

First, find the molecular weight of C₂H₄Cl₂.  Look up in your chemistry book the atomic weights in g/mole of C, H, and Cl.  The molecular weight is

                                  2(C) + 4(H) + 2(Cl).

Dividing  the given mass of C₂H₄Cl₂ by the molecular weight.  Which  gives the number of moles of C₂H₄Cl₂.

Finally, we have to multiply the number of moles of C₂H₄Cl₂ by 2 to get required number of moles of Cl atoms.

The mole is the amount of a system's substance that is equal to the number of elementary entities in 0.012 kilograms of carbon 12; Mol is its symbol. A mole is the amount of a substance that has the same number of discrete entities (like atoms, molecules, and ions) as a sample of pure 12C that weighs exactly 12 g.

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For conversion degree Celsius into kelvin we have to add the value 273 in given value.The temperature in kelvin of 73°C is 346 K.

A temperature converter helps change over the temperature between Fahrenheit and Celsius scale. Temperature is measured using a thermometer.

While Kelvin (K) is the SI unit of temperature, people generally use Centigrade or Celsius (°C) and Fahrenheit (°F) to measure temperature.

For conversion degree Celsius into kelvin we have to add the value 273 in given value.

We have to convert  73°C into kelvin.

Therefore,

= 73 + 273

= 346 Kelvin

Thus, The temperature in kelvin of 73°C is 346 K.

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Answer:

Explanation:

To determine the empirical formula of binary ionic compounds, we need to balance the charges of the cations and anions.

Zn2+ and Cl-: Since Zn2+ has a charge of 2+ and Cl- has a charge of 1-, we need two Cl- ions to balance the charge. Therefore, the empirical formula is ZnCl2.

Zn2+ and S2-: Since Zn2+ has a charge of 2+ and S2- has a charge of 2-, we only need one of each ion to balance the charge. Therefore, the empirical formula is ZnS.

Au3+ and Cl-: Since Au3+ has a charge of 3+ and Cl- has a charge of 1-, we need three Cl- ions to balance the charge. Therefore, the empirical formula is AuCl3.

Au3+ and S2-: Since Au3+ has a charge of 3+ and S2- has a charge of 2-, we need two S2- ions to balance the charge. Therefore, the empirical formula is Au2S3.

The empirical formulas of the binary ionic compounds formed from Zn2+, Au3+, Cl-, and S2- are ZnCl2, ZnS, AuCl3, and Au2S3.

The freezing point of the solution is: 9.19 °C and the boiling point of the solution is: 102.54 °C.

To determine the freezing point of the solution, we can use the equation Δ[tex]T_{f}[/tex] = Kf x molality  

The mass of the solvent in the solution is given as 92.8 mL, so we convert it to grams:

mass of solvent = 92.8 mL x 1.00 g/mL = 92.8 g

mass of solvent = 92.8 g / 1000 g/kg = 0.0928 kg

The moles of solute (ethylene glycol) can be calculated using its molar mass:

moles of solute = 28.2 g / (62.07 g/mol) = 0.4556 mol              

molality = 0.4556 mol / 0.0928 kg = 4.92 m

And the change in freezing point is:  

Δ[tex]T_{f}[/tex] = Kf x molality = 1.86 °C/m x 4.92 m = 9.19 °C

Freezing point of the solution is:

[tex]T_{f}[/tex]= [tex]T_{f}[/tex]- Δ[tex]T_{f}[/tex] = 0 °C - 9.19 °C = -9.19 °C  

To determine the boiling point of the solution, we can use the equation ΔTb = Kb x molality

ΔTb =0.52 °C/m x 4.92 m = 2.54 °C

Boiling point of the solution is:

Tb = Tb + ΔTb = 100 °C + 2.54 °C = 102.54 °C    

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There are more particles (including particles in the gas state) in the reactants than in the product, thus ΔSrxn<0. Because ΔH is large and negative, the reaction will be thermodynamically favorable at low temperatures explain whether or not  reaction is thermodynamically favorable. THe correct answer is A.

The reactants include more particles (including particles in the gaseous state) than the product, therefore ΔSrxn<0.  The reaction will be thermodynamically advantageous at low temperatures since H is big and negative.

ΔS<0. Because  ΔG=ΔH−TΔS<0 is the need for a process to be thermodynamically advantageous, ΔG must be negative for -TS to be substantially lower than ΔH in size. At low temperatures, this will be accurate.

Your question is incomplete but most probably your full question was

  4Fe(s)   +   3O2(g)   ⇋    2Fe2 O3(s) ΔH = −1,650 kJ/molrxn  

The oxidation of Fe(s) is represented by the chemical equation above. Which of the  following correctly explains whether or not the reaction is thermodynamically favorable?

A There are more particles (including particles in the gas state) in the reactants than     in the product, thus ΔSrxn < 0 . Because ΔH is large and negative, the reaction will be    thermodynamically favorable at low temperatures.

B There are more particles (including particles in the gas state) in the reactants than   in the product, thus ΔSrxn < 0. Because ΔH is large and negative, the reaction will   not be thermodynamically favorable at any temperature.

C There are more particles (including particles in the gas state) in the reactants than   in the product, thus ΔSrxn > 0. Because ΔH is large and negative, the reaction will be    thermodynamically favorable at all temperatures.

D There are more particles (including particles in the gas state) in the reactants than in    the product, thus ΔSrxn > 0. Because ΔH is large and negative, the reaction will   not be thermodynamically favorable at any temperature

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The Diels-Alder reaction gives a product containing a conjugated diene and a dienophile.

Stereochemistry depends on the arrangement of the substituents on the starting materials - if the dienophile has a cis configuration relative to the diene, the reaction will give a cis product, and if they are in a trans configuration, then the reaction will give a trans product. In an irreversible reaction, the product is a single dienophile, and can be determined by examining the relative configurations of the starting materials. two single-bonded oxygen atoms, with the newly-formed double-bonded oxygen now attached to a hydrogen atom. This new structure is the carboxyl group, which can be seen in the products of the hydrolysis reaction illustrated above.

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Answer: C

Explanation:

Covalent bonds are formed when atoms share electrons.

Two hydrogen atoms sharing electrons with one oxygen atom are covalent bonds.

A 7.90 L container holds a mixture of two gases at 51 °C. The partial pressures of gas A and gas B, respectively, are 0.292 atm and 0.676 atm. If 0.110 mol of a third gas is added with no change in volume or temperature, the total pressure become 1.25atm.

The Ideal Gas Law states that under the same temperature, pressure and volume all gases contain the same number of molecules.The Ideal Gas law not apply when the temperature and pressure are near the point of transubstantiate into a liquid or solid.

Partial pressure of A gas = 0.292atm

Partial pressure of B gas = 0.676atm

Total pressure=(0.292+0.676)atm

= 0.968atm

Volume = 7.90L

Temperature = 324K

Calculate the number of moles as follows:

PV = nRT

0.968 × 7.90 = n 0.0821L × 324

n =  0.968 × 7.90/ 0.0821L × 324

= 7.64 / 26.6

=0.28 mol

Moles of A and B = 0.28mol

Moles of third gas = 0.110mol

Total moles=(0.28+0.110)mol

=0.39mol

Calculate the total pressure as follows:

P(7.90L)=(0.39mol)(0.0821L.atm/mol.K)(324K)

P=(7.90L)

(0.39mol)(0.0821L.atm/mol.K)(310K)

= 1.25atm

Thus, the total pressure become 1.25atm.

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The reaction is a substitution reaction of a chlorobenzene with bromine in the presence of iron(III) bromide (FeBr3) as a catalyst. The two major products in this reaction are ortho-brominated and para-brominated derivatives of the chlorobenzene.

The structures of these two products can be represented as follows:

Ortho-brominated product and Para-brominated product.

It's worth noting that the ortho- and para-brominating of chlorobenzene is a two-step reaction. First, the iron(III) bromide catalyst reacts with bromine to form iron(III) bromide hexahydrate (FeBr3•6H2O), which acts as a source of electrophilic bromine. The electrophilic bromine then reacts with the chlorobenzene to form the ortho- and para-brominated derivatives.

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E) are inert gases. Inert gases have full outer shells of electrons, making them unreactive and unlikely to form compounds.

Elements that have full outer shells of electrons, also known as noble gases, are highly unreactive and unlikely to form compounds. This is because their electrons are fully occupied in the outermost energy level, so they have no desire to bond with other elements. As a result, they are referred to as "inert gases". Examples of inert gases include helium, neon, argon, krypton, xenon, and radon. Inert gases are often used in a variety of applications due to their stability and lack of reactivity, such as filling the space inside light bulbs, in cooling and refrigeration systems, and as shielding gases in welding.

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The correct option is the option (b) .

What is temperature ?

Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).

What is pressure ?

The definition of pressure is the amount of force that is exerted to a certain region. It can be calculated mathematically as P=FA, where F is the force applied perpendicular to surface area A. The pascal (Pa), or one newton per square metre (N/m 2), is the accepted unit of pressure..

In a constant volume bomb calorimeter change in temperature is ∆T= 30C and as the volume is constant so change in volume ∆V= 0.

So we have work done= P×∆V= P×0= 0

Where P is the pressure.

Again burning calcium metal with oxygen is an exothermic reaction and heat is released.

So "q= -". And we have according to first law of thermodynamics ," energy can neither be created nor be destroyed" So q= ∆E+ W and W=0

So "q=∆E= -".

Hence, q= - , W=0, ∆E= -

So correct option is option-B

Therefore, The correct option is the option (b) .

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The given statement is true. Superficial fascia refers to the fatty hypodermis below the skin.

The lamina propria of mucous membranes is created by areolar connective tissue. In contrast to the deep fascia, which are the sheets of tissue that wrap around muscles, big blood arteries, etc., the superficial fascia is the fatty hypodermis beneath the skin. The hypodermis contains a sizable portion of the body's fat tissue.

Directly beneath the epidermis and the topmost adipose layers is the superficial fascia. It can exhibit stratification both macroscopically and grossly. It is typically defined as consisting of loosely packed interwoven collagen and elastic fibers in membranous layers.

Bones, muscles, nerves, and blood arteries are encircled by deep fascia. Compared to the other kinds, it frequently has a more fibrous nature and is rich in hyaluronan.

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Answer:

water os solvent answer option 3

The molal concentration of the resulting solution is 0.492 m. The concentration number of moles of solute in one kg of solvent.

It is the measure of the concentration number of moles of solute in one kg of solvent.

To calculate the molal concentration first calculated the mass of,

                             mass = density × volume

Put the values,

m = 1 g/mL   19.7 mL

m = 19.7 g     or

m = 0.0197 kg

Calculate the moles of LiCl:

[tex]n = \frac{0.411 m }{42.395 g} * 1 mol[/tex]

n = 9.69 × [tex]10^{-3}[/tex] moles

So, now the molal concentration,

[tex]m = \frac{9.69 * 10^{-3} mol }{0.0197}[/tex]

m = 0.492

Therefore, the molal concentration of the resulting solution is 0.492 m.

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Depending on the reaction conditions, the reaction between selenium (Se) and sodium (Na) can result in a variety of compounds. However, sodium selenide is a frequently formed product (Na2Se).

Under the right circumstances, sodium (Na) and selenium (Se) can react to generate a variety of products, including sodium selenide (Na2Se) and/or other intermediary compounds. The creation of ionic compounds with various stoichiometries is often the outcome of an electron transfer process between the reactants. Temperature, pressure, concentration, and the presence of catalysts are a few examples of the variables that may have an impact on the reaction rate and product distribution. With a high melting point and black hue, sodium selenide is a solid that is frequently utilised in the production of other selenium compounds. Overall, the reaction of selenium with sodium is a significant procedure for producing compounds containing selenium that have a variety of uses in chemistry, materials science, and industry.

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The energy from the sun can be traced to the energy used by the brain from the food we consume.

The brain gets its energy from the food we consume while most of the food we consume come from plants or animals that consume plants.

Plants get their own food directly from sunlight through the process of photosynthesis. They are able to convert solar energy from the sun to chemical energy.

When humans consume food, the energy in the food is unlocked and converted to usable energy by the body. This is part of the energy that the brain makes use of.

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The best option would be that If the half-life is 1 000 years, then the time when 7/8 of nuclei have decayed and 1/8 are remaining is approximately 2,000 years.

Radioactivity is the phenomenon in which an atomic nucleus undergoes spontaneous decay, emitting particles and radiation in the process. This results in the emission of alpha particles (helium nuclei), beta particles (electrons), and gamma rays (high-energy photons), which can be harmful to living things.

The decay process is caused by an unstable ratio of protons to neutrons in the nucleus, leading to the emission of particles and radiation until a more stable configuration is reached.

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