a gas is compressed from 72.9 l to 4.6 l at 0.70 atmospheres? in addition a total of 1700 j of heat are gained from warmer surroundings. what is the change in internal energy in kj?

The given compounds are Enantiomers

Enantiomers are the chemicals that make up the given pair. One of the two stereoisomers is a mirror image of the other but cannot be superposed, much as how one's left and right hands are mirror images of one another but cannot appear identical only by being reoriented. When a chemical has a single chiral atom or another comparable structural feature, it can have two possible structures that are non-superposable and mirror images of one another.

Learn more about Enantiomers here:

https://brainly.com/question/13265194

#SPJ4

While both the South African plain and marine ecosystems have biotic and abiotic factors that support life, the specific organisms and environmental conditions are very different due to the unique characteristics of each ecosystem.

What is Biotic factors?

Biotic factors are living organisms that shape an ecosystem. These include all living things, such as plants, animals, fungi, and bacteria, and their interactions with each other and with their environment. Biotic factors can influence the physical environment, such as by altering the availability of nutrients, or they can directly affect other living organisms through predation, parasitism, or competition.

Biotic factors:

The South African plain ecosystem is home to a variety of large herbivores, such as elephants, zebras, and antelopes, as well as predators like lions and hyenas. The marine ecosystem, on the other hand, is dominated by aquatic animals like fish, whales, dolphins, and sharks, as well as smaller organisms like plankton and algae.

Both ecosystems support a variety of bird species, although the types of birds may differ.

Abiotic factors:

The South African plain ecosystem is characterized by a hot, dry climate with seasonal rainfall. The soil is often sandy and nutrient-poor. In contrast, the marine ecosystem is characterized by a high salinity and a consistent temperature and pressure.

Both ecosystems may experience periodic droughts, although the effects on the organisms living in each ecosystem may differ.

Learn more about Biotic factors from given link

https://brainly.com/question/1322838

#SPJ1

Empirical formula = C : H : O = moles of carbon / smallest number of moles : moles of hydrogen / smallest number of moles : moles of oxygen / smallest number of moles

The empirical formula of a compound can be determined by analyzing the masses of the elements in the compound. In this case, we are given that the combustion of 3.69 g of the compound yields 5.40 g of CO2 and 2.22 g of H2O.

To determine the empirical formula, we need to find the moles of carbon (C), hydrogen (H), and oxygen (O) in the given masses of CO2 and H2O.

First, let's find the moles of carbon in 5.40 g of \(CO_{2}\)
Molar mass of \(CO_{2}\) = 12.01 g/mol (C) + 2(16.00 g/mol) (O)

                                 = 44.01 g/mol
Moles of carbon = mass of CO2 / molar mass of \(CO_{2}\) = 5.40 g / 44.01 g/mol = 0.1227 mol

Next, let's find the moles of hydrogen in 2.22 g of \(H_{2}O\)
Molar mass of \(H_{2}O\) = 2(1.01 g/mol) (H) + 16.00 g/mol (O) = 18.02 g/mol
Moles of hydrogen = mass of \(H_{2}O\) / molar mass of \(H_{2}O\) = 2.22 g / 18.02 g/mol = 0.1231 mol

Now, we can determine the moles of oxygen in the compound by subtracting the sum of the moles of carbon and hydrogen from the moles of oxygen:
Moles of oxygen = 3.69 g / molar mass of compound - (moles of carbon + moles of hydrogen)

Lastly, we can determine the empirical formula by dividing the number of moles of each element by the smallest number of moles obtained:
Empirical formula = C : H : O = moles of carbon / smallest number of moles : moles of hydrogen / smallest number of moles : moles of oxygen / smallest number of moles

Please note that without the actual masses of each element in the compound, we cannot determine the exact empirical formula. However, the steps mentioned above will help you determine the ratio of the elements in the compound.

Learn more about Empirical formula

brainly.com/question/32125056

#SPJ11

The wavelength of the photon emitted during the transition from the n = 5 state to the n = 2 state in the hydrogen atom is approximately 434 nm.

The energy difference between two energy levels in an atom can be used to calculate the wavelength of the emitted or absorbed photon during a transition. In the case of the hydrogen atom, the energy of each energy level is given by the equation:

E = -13.6 eV / n^2

where E is the energy, n is the principal quantum number, and -13.6 eV is the ionization energy of the hydrogen atom.

To find the wavelength of the photon emitted during the transition from the n = 5 state to the n = 2 state, we need to calculate the energy difference between these two levels:

ΔE = E_initial - E_final

= (-13.6 eV / 5^2) - (-13.6 eV / 2^2)

= -1.088 eV

Next, we can use the equation E = hc/λ, where h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength, to calculate the wavelength:

λ = hc/ΔE

= (6.626 x 10^-34 J·s * 3.00 x 10^8 m/s) / (-1.088 eV * 1.602 x 10^-19 J/eV)

≈ 434 nm

Therefore, the wavelength of the photon emitted during the transition from the n = 5 state to the n = 2 state in the hydrogen atom is approximately 434 nm.

Learn more about wavelength

brainly.com/question/31143857

#SPJ11

Answer:

A. discuss the issue with your instructor.

Explanation:

If a lab experiment is not completed then one should discuss it with their instructor because instructor guides how to perform the experiment and also gives instructions to avoid any mis-happening during experiment.

No one should perform any experiment without their instructor in school or college as it can be dangerous to experiment with chemicals or other experimental devices without any supervision.

Hence, the correct option is "A".

Answer:

its because gas doesn't have a form but water does

The volume of 6.9 mol of oxygen at 233 K and a pressure of 4.0 atm is approximately 12.0L.

To calculate volume of a gas, we can make use of Ideal Gas Law equation. It is a fundamental equation in thermodynamics that describes the behaviour of an ideal gas under certain circumstances. It relates pressure(P), volume(V), number of moles (n), and temperature(T) of an ideal gas using the equation:

PV = nRT

Where P = Pressure of the gas,

           V = Volume of the gas,

           n = Number of moles of the gas,

           R = Ideal gas constant commonly expressed as 0.0821  L·atm/(mol·K) or 8.314 J/(mol·K),

          T = Temperature of the gas.

In the question, we are given with:

n = 6.9 mol

T = 233 k

P = 4.0 atm

Substituting the above values in the equation to find the volume, we get:

4.0 * V = 6.9 * 0.0821 * 233

V = (6.9 * 0.0821 * 233) / 4.0

V = 11.9997 (approximately 12.0)

Therefore, The volume of 6.9 mol of oxygen at 233 K and a pressure of 4.0 atm is approximately 12.0L.

To study more about Volume of oxygen:

https://brainly.com/question/31630111

https://brainly.com/question/4987534

Answer:

The specific heat capacity of chromium is 0.449 j/g.°C thus given metal is chromium.

Explanation:

Given data:

Mass of metal = 24 g

Initial temperature = 20 °C

Final temperature = 45°C

Energy absorbed by metal = 269.4 j

Which metal is this  = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 45°C - 20 °C

ΔT = 25°C

269.4 j = 24 g × c × 25°C

269.4 j = 600 g.°C× c

c = 269.4 j/600 g.°C

c =0.449 j/g.°C

The specific heat capacity of chromium is 0.449 j/g.°C thus given metal is chromium.

The equilibrium constant, Ka, for the dissociation of acetylsalicylic acid (aspirin), \(HC_9H_7O_4\), can be expressed by the equation is \(HC_9H_7O_4 + H_2O\) ⇌\(H_3O+ + C_9H_7O_4-\).

Acetylsalicylic acid (aspirin) is a common pain reliever that is made up of the following chemical formula: \(HC_9H_7O_4\). It has a Ka value of \(3.00*10^-^4,\)which means it is a weak acid.

The Ka value is a measure of an acid's strength, and it is calculated by dividing the concentration of the products by the concentration of the reactants. If a chemical has a higher Ka value, it will have a greater concentration of \(H_3O+\) ions and will be more acidic.

A weaker acid will have a smaller Ka value, indicating a lower concentration of \(H_3O+\) ions.Acetylsalicylic acid (aspirin) is classified as a weak acid because it does not fully dissociate in water. When it comes into touch with water, only a portion of it breaks down into its constituent ions.

The hydrogen ion from the acid breaks off and is replaced by a hydronium ion, forming acetylsalicylate ions and H3O+ ions. This reaction is described by the following equation:\(HC_9H_7O_4 + H_2O\) ⇌ \(H_3O+ + C_9H_7O_4-\) .Acetylsalicylic acid (aspirin) is a weak acid because it has a low concentration of\(H_3O+\) ions due to the incomplete dissociation of the acid.

This indicates that the majority of the acid remains undissociated, with only a few ions being produced. Furthermore, the aspirin's Ka value indicates that it is not as strong as some other acids, such as hydrochloric acid.

Know more about   equilibrium constant  here:

https://brainly.com/question/3159758

#SPJ8

As you can see, NH₂OH structure only has simple bonds.

Answer: letter 'c', no double bounds.

The energy to launch the model spacecraft come from the spacecraft that is moving against the magnetic field.

The energy to launch the model spacecraft come from the spacecraft that is moving against the magnetic field. the called potential energy in the magnetic field is moving is used to move the magnet against the magnetic field. magnetic force can be converted into the potential energy in to the kinetic energy. An electric current is created by electromagnetic. it will create the model of magnetic system.

Thus, The energy to launch the model spacecraft come from the spacecraft that is moving against the magnetic field.

To learn more about spacecraft here

https://brainly.com/question/13736014

#SPJ9

The dosage of 26mg can be prepared using approximately 1.625 mL of the 40mg in 2.5 mL solution.

The dosage of 22mg can be prepared using approximately 1.222 mL of the 36mg per 2 mL strength solution.

To calculate the dosage using ratio and proportion, we can set up a proportion based on the strength of the solution.

40mg in 2.5 mL solution will be used to prepare a 26mg dosage.

Let X represent the mL of the solution needed to prepare the 26mg dosage.

We can set up the proportion as follows:

40mg/2.5mL = 26mg/X mL

Cross-multiplying and solving for X, we have:

40mg * X mL = 2.5mL * 26mg

40X = 65

X = 65/40

X ≈ 1.625 mL

For the second question:

36mg per 2 mL strength solution is used to prepare 22mg.

Let Y represent the mL of the solution needed to prepare the 22mg dosage.

We can set up the proportion as follows:

36mg/2mL = 22mg/Y mL

Cross-multiplying and solving for Y, we have:

36mg * Y mL = 2mL * 22mg

36Y = 44

Y = 44/36

Y ≈ 1.222 mL

To know more about solution

https://brainly.com/question/1616939

#SPJ11

Moles of AlCl_3

\(\\ \tt\hookrightarrow \dfrac{352}{133}=2.64mol\)

Now

\(\\ \tt\hookrightarrow 4.2=\dfrac{2.64}{V}\)

\(\\ \tt\hookrightarrow V=0.62L\)

if the concentration of oh- in a saturated solution of ca(oh)2 is 5.2 x 10-2 m,  the solubility of ca(oh)2 is same as 0.1g/100.ml

From the given data,

Concentration of OH in a saturated solution = 5.2 x 10-²M, Step 1 - Find the solubility

Concentration: Ca(OH)2(s) = Ca+2 (aq) + 2OH(aq),As the equation is in equilibrium, so s= 2s=2 x 5.2 x 10-2= 10.4 x 10-² L = 10.4 x 10-² x 1000 ml = 0.104 g / 100 ml

Therefore the solubility will be equal.

The highest quantity of a substance that would disintegrate in a volume of solvent at a given temperature is defined as solubility. Solubility is a characteristic of a specific bulk solution combination, and the water solubility of different substances vary greatly. Concentration in chemistry is defined as that of the abundance of a constituent divided by the total volume of a mixture. There are four types of mathematical descriptions: mass density, molar concentration, number concentration, and volume concentration.

To learn more about concentration here:

https://brainly.com/question/10725862

#SPJ4

Answer:

Only ask one question

Explanation:

Answer:

36.55 J

Explanation:

PE = Potential energy

KE = Kinetic energy

TE = Total energy

The following data were obtained from the question:

Position >> PE >>>>> KE >>>>>> TE

1 >>>>>>>> 72.26 >> 27.74 >>>> 100

2 >>>>>>>> 63.45 >> x >>>>>>>> 100

3 >>>>>>>> 58.09 >> 41.91 >>>>> 100

The kinetic energy of the pendulum at position 2 can be obtained as follow:

From the table above, at position 2,

Potential energy (PE) = 63.45 J

Kinetic energy (KE) = unknown = x

Total energy (TE) = 100 J

TE = PE + KE

100 = 63.45 + x

Collect like terms

100 – 63.45 = x

x = 36.55 J

Thus, the kinetic energy of the pendulum at position 2 is 36.55 J.

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

From the question we have

\(V_2 = \frac{P_1V_1}{P_2} \\\)

From the question we have

\(V_2 = \frac{40 \times 20}{80} = \frac{800}{80} = 10 \\ \)

We have the final answer as

hope this helps you

Answer:

\(\color {pink}\boxed{\colorbox{black} { QUESTION♡}}\)

How does a balanced chemical equation verify the law of conservation of matter?

\(\color {pink}\boxed{\colorbox{white} {✦Answer✦}}\)

According to the Law conservation of matter

Mass can neither be created nor destroyed in a chemical reaction. That is, the total mass of the elements present in the products of a chemical reaction has to be equal to the total mass of the elements present in the reactants. In other words, the number of atoms of each element remains the same, before and after a chemical reaction. Hence, we need to balance the skeletal chemical equation.

\(\color {pink}\boxed{\colorbox{white} {✦hope helps uh<3✦}}\)

Answer:

its B

Explanation:

not so sure but its reasonable for me

Answer:

B

Explanation:

Hail form as water droplets freeze to form chunks or balls of ice

Please give me Brainliest as I provided an explanation

Answer:

KCI

Explanation:

I took the test

The reason KCl or potassium chloride, an electrovalent chemical, conducts electricity when it is liquid or molten is because the electrostatic forces of attraction are weaker in the fused form or in aqueous solution.

For a substance to conduct electricity, charged particles like electrons and ions must be allowed to move around freely within it. Like many other ionic compounds, potassium chloride possesses fixed ions in its solid state that prevent it from moving or conducting electricity. For example; Hydrogen chloride is a polar covalent molecule that can ionize in solution and serve as an electrolyte.

An great electrical conductor is potassium. Its atomic radius is bigger because it contains four shells with just one electron in the outermost shell. It is a powerful conductor of electricity because it has a lower ionization energy and a higher number of free electrons. Mineral deposits and igneous rocks are the sources of potassium.

To find more about the similar questions on 'electrical conduvctivity'

visit- https://brainly.com/question/1458220

#SPJ2

Answer:

B³+

Explanation:

In the compound, boron shows an oxidation state of +3. The first three ionization energies of boron, however, are much too high to allow formation of compounds containing the B³+ ion

The gas is Argon.

To identify the gas, we need to compare the number of moles calculated for each gas with the given density.

Let's calculate the number of moles for each gas and compare them:

Given:

Density = 1.17 × 10^(-6) g/cm^3

Pressure = 1.00 × 10^(-3) atm

Temperature = 60.0 °C = 60.0 + 273.15 = 333.15 K

Molar mass of Oxygen (O2) = 32.00 g/mol

Molar mass of Neon (Ne) = 20.18 g/mol

Molar mass of Hydrogen (H2) = 2.02 g/mol

Molar mass of Chlorine (Cl2) = 70.90 g/mol

Molar mass of Argon (Ar) = 39.95 g/mol

Molar mass of Nitrogen (N2) = 28.02 g/mol

For Oxygen (O2):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 5.88 × 10^(-12) mol

For Neon (Ne):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 9.26 × 10^(-12) mol

For Hydrogen (H2):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 9.26 × 10^(-11) mol

For Chlorine (Cl2):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 2.58 × 10^(-12) mol

For Argon (Ar):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 4.64 × 10^(-12) mol

For Nitrogen (N2):

n = (PV) / (RT) = (1.00 × 10^(-3) atm) × (1.17 × 10^(-6) g/cm^3) / ((0.0821 L × atm/(mol × K)) × 333.15 K)

n = 6.45 × 10^(-12) mol

Comparing the number of moles calculated for each gas with the given density, we find that the gas with the closest value is Argon (Ar). Therefore, the gas is Argon.

Learn more about Argon from the given link

https://brainly.com/question/23949935

#SPJ11

The maximum theoretical suction life of a centrifugal pump at sea level is approximately a) 15 feet

The maximum height that any centrifugal pump may theoretically raise water is 10.33 metres above sea level. Suction lift is the vertical distance on the suction side of the pump between the pump impeller and the liquid surface if the liquid is below the pump datum.

The hoover is created by the ground-level pump, which can theoretically raise a maximum of roughly 30 feet (34 feet if a flawless hoover could be created).

learn more about centrifugal pump

https://brainly.com/question/13427593

#SPJ1

Answer: The rate constant is the reaction rate divided by the concentration terms.

Answer:

D. apple juice

Explanation:

Salinity (ppt) = 0.0018066 5 Cl- (mg/L) is a relationship that can be used to calculate salinity. the conductivity data to a salinity value under the presumption that the majority of the ions in the solution are non-carbonate salt ions (e.g., Na+, K+, or Cl-).

Approximately 3.5% of the weight of seawater is made up of dissolved salts due to the salinity, or salt concentration, of saltwater, which is 35 parts per thousand. The weight of salt (as sodium chloride) in a cubic mile of saltwater is equivalent to around 120 million tons.

The quantity of dissolved salts in water is measured as salinity. The standard units of measurement are parts per thousand (ppt) and percentage (%). Riverine freshwater has a salinity of 0.5 ppt or less.

A solution of water and salt with a salinity of 40% is created by dissolving 40 grams of salt in 100 grams of water.

x ppt = x grams salt/ 1000 grams seawater

To know more about salinity visit:

https://brainly.com/question/20283396

#SPJ4

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\ \)

From the question we have

\(volume = \frac{50}{0.785} \\ = 63.694267...\)

We have the final answer as

Hope this helps you

A probing question that lies within the scope of physics could be: "What is the nature of dark matter and dark energy, and how do they influence the expansion of the universe?

Dark matter and dark energy are hypothetical forms of matter and energy that are believed to exist based on their observed gravitational effects on galaxies and the expansion of the universe.

Dark matter is thought to be a type of matter that does not interact with light or other electromagnetic radiation, while dark energy is an unknown form of energy that is causing the universe to expand at an accelerated rate.

Exploring the nature of dark matter and dark energy falls under the purview of physics because it involves understanding the fundamental forces and particles that govern the behavior of the universe.

Physicists study these phenomena by analyzing the gravitational effects they have on visible matter, conducting experiments to detect dark matter particles, and developing theoretical models to explain their properties and interactions.

Addressing this probing question requires the application of various branches of physics, such as cosmology, astrophysics, particle physics, and quantum mechanics.

Researchers employ observational data, theoretical frameworks, and advanced technologies to investigate the nature and origin of dark matter and dark energy, contributing to our understanding of the fundamental nature of the universe and its evolution.

For more such questions on probing question visit:

https://brainly.com/question/10753271

#SPJ8

Answer:

sulfur and water

Explanation:

sulfur + water --> sulfuric acid

^ reactants. ^ product

The ATP (Available-to-Promise) for weeks 1 to 8 is the amount of inventory that a firm can commit to fulfilling customer orders within that time frame.

To calculate the ATP, you need to consider the MPS (Master Production Schedule) and the ATP calculations.

1. Start by looking at the MPS for weeks 1 to 8. The MPS represents the planned production quantities for each week.
2. Determine the beginning inventory for week 1. This is the inventory available at the start of week 1.
3. Add the MPS quantity for week 1 to the beginning inventory. This gives you the available inventory for week 1.
4. Subtract customer orders for week 1 from the available inventory. This gives you the remaining inventory after fulfilling customer orders for week 1.
5. Repeat steps 3 and 4 for each subsequent week, using the previous week's remaining inventory as the beginning inventory for the next week.
6. Continue this process until you reach week 8, calculating the available inventory and subtracting customer orders for each week.
7. The resulting values represent the ATP for weeks 1 to 8.

The ATP can fluctuate as new customer orders are received or changes are made to the MPS. Regular monitoring and adjustment of the ATP is necessary to ensure accurate order fulfillment.

Learn more about inventory from:

https://brainly.com/question/26977216

#SPJ11