The work needed to isentropically compress 2kg of steam in a cylinder at 400kPa and 400C to 2 MPa

Answer:

The right answer is "74.516 kPa".

Explanation:

The given values are:

V₁ = 21.5 L

V₂ = 32.6L

P₁ = 107 kPa

T₁ =27.2°C+273

T₂ = 44.1 °C+273

As we know,

⇒  \(\frac{P_1V_1}{T_1}= \frac{P_2V_2}{T_2}\)

then,

⇒  \(P_2=\frac{P_1V_1T_2}{T_1V_2}\)

On substituting the given values, we get

⇒       \(=\frac{107\times 21.5\times (44.1+273)}{(27.2+273)\times 32.6}\)

⇒       \(=\frac{107\times 21.5\times 317}{300.2\times 32.6}\)

⇒       \(=\frac{729258.5}{9786.52}\)

⇒       \(=74.516 \ kPa\)

Unlike protons and neutrons, which are housed inside the atom's nucleus at its center, electrons are found outside the atom.

An atom can have a label in addition to a symbol or atomic number. The label is formatted as "(text)" (without the quotation marks), which means "text, closed curved bracket, open curved bracket." If an isotopic mass is present, it should come after the chemical symbol, followed by the label.

The element is represented by the letter(s) in the centre. The atomic number, which indicates the quantity of protons, is the number in the bottom left corner.

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After valves are opened and enough time has passed for net movement of particles between containers to stop, pressure of gas in middle container will be closest to 3 atmospheres as pressure will be halved after opening valves.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

Pressure will be halved after opening valves as it will be bifurcated ,thus, 9/2=4.5 which is closest 3 atmospheres.

Thus,the pressure of gas in the middle container will be closest to 3 atmospheres.

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A delocalized π bond is a π bond which is spread over more than two atoms.

A delocalized π bond can exist where π bonds are separated by more than one single bond. The most famous example of delocalized π bonds is benzene. The species that contains a delocalized π bond is Benzene, C6H6.

                             This is because the electrons in the π bond are spread out over all of the six carbon atoms in the benzene ring, making it a delocalized π bond rather than a localized π bond.

                                    The delocalization of the π electrons stabilizes the molecule, making it more difficult to break apart. It is also responsible for the characteristic stability of benzene, which is why it is so commonly used in organic chemistry. Hence, the detailed answer is Benzene.

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Answer:

13.75

Explanation:

Density is equal to mass divided by volume. 110/8 = 13.75

Answer:

- energy released by nuclear reaction is much greater than energy released by chemical reaction.

Explanation:

This is because nuclear bombs rely on nuclear reactions, which release energy from the splitting of atomic nuclei or the merging of atomic nuclei, whereas non-nuclear bombs rely on chemical reactions, which involve the breaking and forming of chemical bonds. Nuclear reactions release many orders of magnitude more energy than chemical reactions, resulting in much greater destructive power.

Answer:

c

Explanation:

incresing wave length

The petroleum is formed naturally as it flammable liquid that is found within rock formations in the earth.

The petroleum is formed naturally as it flammable liquid that is found within rock formations in the earth. It is comprised of the mixture of the hydrocarbons and the other organic compounds.

The Petroleum such as the coal is formed, in the general, formed through the compression and the heating of the organic materials over the geologic time. On the contrary to the coal, which will owes its origins to the decomposition of the terrestrial plant life, the petroleum will be traced to the burial of the marine.

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Answer:

Explanation:

CaCO3 = 1*Ca + 1*C + 3*O

              =1*40 + 1*12 + 3*16

               =40 + 12 + 48

               =100 amu

Answer:

2.5 atm

Explanation:

To find the original pressure of the gas, you need to use the Combined Gas Law. The corresponding equation is:

\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)

In this equation, "P₁", "V₁", and "T₁" represent the original pressure, volume, and temperature. "P₂", "V₂", and "T₂" represent the new pressure, volume, and temperature.

Before you can plug the given values into the equation and solve for "P₁", you need to convert the temperatures from Celsius to Kelvin (°C + 273 = K).

The final answer should have 2 sig figs like the least accurate given value.

P₁ = ? atm                                          P₂ = 2.0 atm

V₁ = 28 L                                           V₂ = 34 L

T₁ = 45°C + 273 = 318 K                   T₂ = 35°C + 273 = 308 K

\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)                                            <----- Combined Gas Law

\(\frac{P_1(28L)}{318K}=\frac{(2.0 atm)(34L)}{308K}\)                            <----- Insert values

\(\frac{P_1(28L)}{318K}=0.2208\frac{atm*L}{K}\)                            <----- Simplify right side

\({P_1(28L)}=70.21atm*L\)                         <----- Multiply both sides by 318 K

\(P_1=2.5atm\)                                           <----- Divide both sides by 28 L

Answer:

Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

Im not sure if this answers your question but here!

Sedimentary rocks are one of three main types of rocks, along with igneous and metamorphic. They are formed on or near the Earth’s surface from the compression of ocean sediments or other processes.

Moth flakes dissolve in methanol at a rate of A, 16.7 g/100mL.

The solubility of moth flakes in methanol is the maximum amount of the solute that can dissolve in a given amount of solvent at a given temperature.

To calculate the solubility of moth flakes in methanol, divide the mass of moth flakes by the volume of methanol and multiply by 100 to express the result as grams per 100 mL of solution.

So, the solubility of moth flakes in methanol is:

Solubility = (mass of moth flakes / volume of methanol) x 100

Solubility = (12.54 g / 75.2 mL) x 100

Solubility = 16.7 g/100mL

Therefore, the solubility of moth flakes in methanol is 16.7 g/100mL.

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Answer:

a. po tamang sagot

Explanation:

pa pafoolow po pleasr

The DNA and RNA are polynucleotides which contain a chain of nucleotides monomers with different nitrogenous bases. Each  nucleotide different from the others, as  It has different bases. The correct option is A.

A nucleotide is defined as a compound containing three component units, namely a pentose sugar (either ribose or 2-deoxyribose), a heterocyclic nitrogenous base (a substituted purine or a substituted pyrimidine) and a phosphate group.

The nucleotides are the phosphate esters of nucleosides. A nucleotide containing ribose as the sugar unit is termed as the ribonucleotide. While one containing 2-deoxyribose as the sugar unit is termed as the deoxyribonucleotide.

The nitrogenous bases in RNA are adenine, guanine, cytosine and uracil whereas in DNA the bases are adenine, guanine, cytosine and thymine. The purines are adenine and guanine whereas cytosine, thymine and uracil are pyrimidines.

Thus the correct option is A.

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The realm of physics that describes light as having strictly wave-like character is called classical optics. It is a branch of physics that deals with the study of light and its behavior, including reflection, refraction, diffraction, interference, polarization, and other related phenomena.

The classical optics, light is treated as an electromagnetic wave, which is characterized by its wavelength, frequency, and amplitude. This theory was developed in the 17th century by scientists like Isaac Newton and Robert Hooke, who believed that light travels in straight lines and exhibits wave-like properties. However, in the early 20th century, Albert Einstein's theory of the photoelectric effect challenged the wave-like nature of light and proposed that light also behaves as particles called photons. This led to the development of quantum mechanics, which describes the behavior of matter and energy at the atomic and subatomic level. In summary, classical optics is the realm of physics that describes light as having strictly wave-like character, phenomena. while quantum mechanics considers both the wave and particle nature of light.

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The fluorescent bulb has a better energy output than the regular bulb.

The main difference between the energy output of a fluorescent bulb and a regular (incandescent) bulb is their efficiency. Fluorescent bulbs are much more energy-efficient than incandescent bulbs because they convert a much higher proportion of the energy they consume into visible light, rather than heat.

Incandescent bulbs work by heating a filament inside the bulb until it glows, emitting light. However, this process is very inefficient, with most of the energy consumed being lost as heat. In contrast, fluorescent bulbs use a small amount of energy to excite a gas inside the bulb, which then emits ultraviolet (UV) light.

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Answer:

6=100  

Explanation:

a. The Lewis structure for SCl₂ is S-Cl-Cl with a lone pair on sulfur. The VSEPR theory predicts a bent or V-shaped molecular geometry.

b. The Lewis structure for PI₃ is P-I-I-I with two lone pairs on the central phosphorus atom. The VSEPR theory predicts a trigonal pyramidal molecular geometry.

c. The Lewis structure for Cl₂CO is O=C=Cl with no lone pairs. The VSEPR theory predicts a linear molecular geometry for Cl2CO.

d. The Lewis structure for NH₂Cl is H-N-Cl with two lone pairs on the nitrogen atom. The VSEPR theory predicts a trigonal pyramidal molecular geometry.

e. The Lewis structure for SiCl₃Br is Br-Si-Cl-Cl-Cl with no lone pairs. The VSEPR theory predicts a trigonal pyramidal molecular geometry.

f. The Lewis structure for ONCl is O=N-Cl with no lone pairs. The VSEPR theory predicts a linear molecular geometry.

To draw the Lewis structure, you need to determine the number of valence electrons for each atom in the molecule and then arrange them to form covalent bonds while fulfilling the octet rule (except for hydrogen, which follows the duet rule). Once the Lewis structure is determined, you can use the VSEPR theory to predict the molecular geometry based on the arrangement of electron pairs around the central atom.

In each case, the molecular geometry is determined by the number of bonding and lone pairs of electrons around the central atom. The VSEPR theory provides a model for predicting the shapes of molecules based on the repulsion between electron pairs.

The molecular geometries predicted by the VSEPR theory are as follows:

a. SCl₂: Bent or V-shaped

b. PI₃: Trigonal pyramidal

c. Cl₂CO: Linear

d. NH₂Cl: Trigonal pyramidal

e. SiCl₃Br: Trigonal pyramidal

f. ONCl: Linear

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Answer:

gas production

Explanation:

Answer:

gas formation

Explanation:

frothy bubbles produced by carbon dioxide gas are a sign that a chemical reaction has occurred when a based is mix with acid.

Answer:

0.1169g .

Explanation:

1. Multiply the concentration (0.5 mols/Liters) by the volume of solution you want (0.5 Liters) to find the moles of NaCl you need. 2. Multiply the moles of NaCl by its molar mass (58.44 g/mol) to find the grams of solute needed.

Carbon dioxide and particulates are emitted by volcanoes. Particulates form stratospheric aerosols that reflect sunlight The impact of atmospheric carbon dioxide and stratospheric aerosols can be briefly described below.

Carbon dioxide (CO₂): Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect and global warming. It is released into the atmosphere through various human activities, such as the burning of fossil fuels and deforestation. The increasing concentration of CO₂ in the atmosphere is a significant driver of climate change.

Stratospheric aerosols: Stratospheric aerosols, formed by the release of particulates from volcanic eruptions or human activities, can have a cooling effect on the Earth's climate. These aerosols reflect sunlight back into space, reducing the amount of solar radiation that reaches the Earth's surface. As a result, they can temporarily offset some of the warming caused by greenhouse gases like CO2.

It's important to note that while stratospheric aerosols can have a cooling effect, they are relatively short-lived in the atmosphere compared to CO₂. Carbon dioxide, on the other hand, has a long residence time and accumulates over time, leading to long-term warming.

Therefore, the overall impact of increasing atmospheric CO₂ concentrations outweighs the cooling effect of stratospheric aerosols.

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Answer:

Answer:

Hey sis

will you be my sis??

please give reply

I will be waiting

and fol.low.me

Answer:

See explanation below

Explanation:

To get this, we need to apply the general expression for half life decay:

N = N₀e(-λt)    (1)

Where:

N and N₀ would be the final and innitial quantities, in this case, masses.

t: time required to decay

λ: factor related to half life

From the above expression we need λ and t. To get λ we use the following expression:

λ = t₁₂/ln2   (2)

And we have the value of half life, so, replacing we have:

λ = 8.04 / ln2 = 11.6

Now, we can replace in (1) and then, solve for t:

0.75 = 40 exp(-11.6t)

0.75 / 40 = exp(-11.6t)

ln(0.01875) = -11.6t

-3.9766 = -11.6t

t = -3.9766 / -11.6

Answer: There are \(40.41 \times 10^{23}\) molecules present in 6.71 moles of \(NH_{3}\).

Explanation:

Given: Moles of \(NH_{3}\) = 6.71 mol

According to the mole concept, 1 mole of every substance contains \(6.022 \times 10^{22}\) molecules.

Therefore, molecules present in 6.71 moles are calculated as follows.

\(Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}\)

Thus, we can conclude that there are \(40.41 \times 10^{23}\) molecules present in 6.71 moles of \(NH_{3}\).

The complete balanced chemical reaction can be written from the half reaction in acidic solution is,

           NO3- + 4H+ + 3e ----> NO + 2H2O.

The half reaction is the part of reaction which represents either an oxidation or a reduction. There are two half-reactions. one is oxidation and other is reduction. Both are necessary to completely describe a redox reaction.

NO3- ----> NO.

This reaction is not balanced and not completed.

NO3- + 4H+ + 3e----> NO + 2H2O.

This is a balanced chemical reaction. A balanced equation contains the same number of each type of atoms on both the left and right sides of the reaction arrow. To write a balanced equation, the reactants go on the left side of the arrow, while the products go on the right side of the arrow.

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In the context of the nickel-silver cell described in Part A, the matched  descriptions to the anode or cathode are given.

a) Ni - Anode

b) Ag - Cathode

c) Gain mass - Cathode

d) Loses mass - Anode

e) Positive electrode - Anode

f) Negative electrode - Cathode

g) Attracts electrons - Cathode

h) Stronger reducing agent - Anode

The anode—the oxidation site where nickel ions enter into solution and electrons leave the electrode and pass through the voltmeter as they proceed to the silver cathode—is nickel.

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Some uses of a watch glass in the laboratory are to cover a beaker or a flask and to hold small quantities of a substance.

A watch glass is a piece of lab equipment that is a shallow, convex dish used in chemistry and biology labs. It is named for its resemblance to a pocket watch. Here are some uses of a watch glass in the laboratory:

1. To cover a beaker or a flask: Watch glasses are frequently used to cover beakers or flasks when heating solutions. This prevents the liquids from splashing out while still allowing gases to escape.

2. To hold small quantities of a substance: Watch glasses are useful for holding small amounts of a substance. They may also be utilized to weigh tiny quantities of powders by utilizing an analytical balance.

3. To evaporate small amounts of liquid: Watch glasses may be utilized to evaporate tiny amounts of liquids. If a small quantity of a solution must be evaporated, for example, a few drops of water, it can be placed on a watch glass and allowed to evaporate on its own.

4. To perform simple reactions: Watch glasses may be utilized to carry out simple chemical reactions. If a few drops of one solution are mixed with a few drops of another, for example, the reaction can be observed on a watch glass.

5. As a support for crucibles: Watch glasses can be utilized to support crucibles. They are placed under a crucible to prevent direct contact with a hot plate or a wire gauze, which can cause damage to the crucible.

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A chemical reaction is one in which the bonds are broken within the reactant molecules and new bonds are formed within the product molecules in order to produce a new substance.

The reaction of silver nitrate with hydrochloric acid forms a thick curdy white precipitate of silver chloride. The white precipitate is insoluble in nitric acid but soluble in ammonium hydroxide solution and forms diamine silver (I) chloride.

a) AgNO₃ + HCl → AgCl + HNO₃

b) Complete ionic equation: Ag⁺ (aq) + NO₃⁻ (aq) + H⁺ (aq) + Cl⁻ (aq) = AgCl (s) + H⁺ (aq) + NO₃⁻ (aq)

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