a gas is contained in a thick walled balloon. when the pressure chnages from 1.21 atm to 2.52 atm the volume changes from 3.75 l to 1.72 and the temperature changes from 293 k to ___A.P B.V C.n D.T

Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

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Strontium (Sr) is located in Group 2 of the periodic table. It has an atomic number of 38.

Phosphorus (P) is located in Group 15 of the periodic table. It has an atomic number of 15.

Oxygen (O) is located in Group 16 of the periodic table. It has an atomic number of 8.

Strontium (Sr) has 2 valence electrons.

Phosphorus (P) has 5 valence electrons.

Oxygen (O) has 6 valence electrons.

Strontium (Sr) will lose its 2 valence electrons to form a +2 monatomic ion, which is Sr2+.

Phosphorus (P) will gain 3 electrons to complete its octet and form a -3 monatomic ion, which is P3-.

Oxygen (O) will gain 2 electrons to complete its octet and form a -2 monatomic ion, which is O2-.

Phosphorus and oxygen can form a polyatomic ion called phosphate.

The formula of the phosphate ion is PO₄³⁺.

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Explanation:

To calculate the volume of the container that the gas is in, we can use the ideal gas law, which is given by the equation:

PV = nRT

where:

P = pressure of the gas (in atm)

V = volume of the gas (in liters)

n = amount of gas in moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature of the gas (in Kelvin)

First, we need to convert the given temperature from Celsius to Kelvin by adding 273.15 to it:

T = 62°C + 273.15 = 335.15 K

Now we can plug in the given values into the ideal gas law equation and solve for V:

P = 9 atm

n = 8.3 moles

R = 0.0821 L·atm/(mol·K)

T = 335.15 K

PV = nRT

9 V = 8.3 * 0.0821 * 335.15

V = (8.3 * 0.0821 * 335.15) / 9

V ≈ 26.79 liters

So, the volume of the container that the gas is in is approximately 26.79 liters.

Answer:

2 molecules

Explanation:

thete are 2 moleculed in 2NH3

Standardizing a sodium hydroxide solution is necessary because NaOH reacts with atmospheric carbon dioxide to form sodium carbonate and water, reducing the accuracy of its concentration.

We standardize a sodium hydroxide (NaOH) solution, which means we determine its exact concentration, because NaOH is a strong base that reacts with atmospheric carbon dioxide (CO₂) to form sodium carbonate (Na₂CO₃) and water (H₂O):

2NaOH (aq) + CO₂ (g) → Na₂CO₃ (aq) + H₂O (l)

This reaction reduces the concentration of NaOH in the solution, making it less accurate for titrations or other chemical analyses. Standardizing the NaOH solution involves titrating it with a known concentration of an acid, such as hydrochloric acid (HCl), using an appropriate indicator to determine the exact concentration of NaOH.

During the titration, the acid and base react in a 1:1 ratio according to the balanced chemical equation:

HCl (aq) + NaOH (aq) → NaCl (aq) + H₂O (l)

The endpoint of the titration is reached when all the HCl has reacted with the NaOH, and the solution becomes neutral. An indicator, such as phenolphthalein, is used to signal the endpoint of the titration, where the indicator changes color from pink to colorless. The volume of acid required to reach the endpoint is measured, and the concentration of NaOH is calculated using stoichiometry.

Standardizing the NaOH solution ensures that its concentration is accurately known, allowing it to be used in subsequent chemical reactions or analyses. It is important to standardize the NaOH solution periodically, as the concentration can change over time due to factors such as atmospheric carbon dioxide absorption, water absorption, or contamination.

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Answer:

its 19 I'm pretty sure about

Answer:

c is correct and my girl friend

Answer

Energy level VI

Explanation

Energy levels which is also called electron shells are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center.

Therefore, when the electron of an atom is in the n = 6 level, this means the electron is in the energy level VI.

The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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The metric unit conversions based on conversion factors are:

The metric unit conversions of the given data are as follows:

1. 1 mg = 0.001 g

36.52 mg = 36.52 × 0.001

36.52 mg = 0.03652 g

2. 1 kg = 1000000 mg

14.72 kg = 14.72 × 1000000

14.72 kg = 14720000 mg

3. 1 hm = 1000 dm

0.0035 hm= 0.0035 × 1000

0.0035 hm = 3.5 dm

4. 1 m = 0.001 km

0.134 m = 0.134 × 0.001

0.134 m = 0.000134 km

5. 1mm = 0.1 cm

25 mm = 25 × 0.1

25 mm = 2.5 cm

6. 1 cm^3 = 1 mL

2.5 cm^3 = 2.5 mL

7. 1 daL= 10 L

243 daL = 243 × 10

243 daL = 2430 L

8. 1 L = 1000 mL

45.23 L = 45.23 × 1000

45.23 L = 45230 mL

9. 1 hL = 10000 cL

0.035 hL = 0.035 × 10000

0.035 hL = 350 cL

10. 1 mm = 0.001 m

27.32 mm = 27.32 × 0.001

27.32 mm = 0.02732 m

11. 1 m = 10 dm

15 m = 15 × 10

15 m = 150 dm

12. 1 cc = 0.001 L

0.023 cc = 0.023 × 0.001

0.023 cc = 0.000023 L

13. 1 km = 1000000 mm

0.00049 km = 0.00049 × 1000000

0.00049 km = 490 mm

14. 1 kg = 1000 g

0.025 kg = 0.025 × 1000

0.025 kg = 25 g

Therefore, the metric conversions based on conversion factors are:

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Answer:

36.52 mg = 0.03652 g

14.72 kg = 14720000 mg

0.0035 hm = 3.5 dm

0.134 m = 0.000134 km

25 mm = 2.5 cm

2.5 cm^3 = 2.5 mL

243 daL = 2430 L

45.23 L = 45230 mL

0.035 hL = 350 cL

27.32 mm = 0.02732 m

15 m = 150 dm

0.023 cc = 0.000023 L

0.00049 km = 490 mm

0.025 kg = 25 g

ANSWER

The number of moles of Pb(SO4)2 is 1.5 moles

EXPLANATION

Given that;

The mass of Li2SO4 is 330g

Follow the steps below to find the moles of Pb(SO4)2

Step 1; Write the balanced equation of the reaction

Step 2; Find the number of moles of Li2SO4 using the below formula

Recall, that the molar mass of Li2SO4 is 109.94 g/mol

The number of moles of Li2SO4 is 3.00 moles

Step 3; Find the number of moles of Pb(SO4)2 using a stoichiometry ratio

In the above equation of the reaction, 1 mole Pb(SO4)2 reacts to give 2 moles LiSO4

Let the number of moles of Pb(SO4) be x

Therefore, the number of moles of Pb(SO4)2 is 1.5 moles

Answer:

Explanation:

To solve this problem we have to find the moles of iron(II) chloride that react. Using the chemical equation, we can kknow moles FeCl2 = Moles FeCO3. Thus, we can find the moles of FeCO3. Converting these moles to grams using its molar mass -Molar mass FeCO3: 115.854g/mol-

Moles FeCl2 = Moles FeCO3:

1.24L * (2.00mol / L) = 2.48 moles FeCl2

Mass FeCO3:

2.48mol * (115.854g / mol) =

Answer:

its 287

Explanation:

i got it right on edm

Answer:

Ozone

Explanation:

The ozone layer protects the UV rays and also theres a hole in it near antarica which is causing global warming!

Off topic sorry lol:P

I hope this helps i got the answer correct

Remember to mark brainliest

The false statement is that adding more H2(g) rises the equilibrium constant.

Q can be utilized to predict which way a response will shift to achieve equilibrium. If K > Q, the reaction will continue, converting reagents into products. If K Q, the reaction will go in the opposite direction, converting products back into reactants. If Q = K, the system has already reached equilibrium.

Here are some examples of equilibrium: A book resting on a table. A car moving at a constant speed. A chemical reaction in which the prices of forward and reverse reactions are the same.

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The complete question is-

Consider: H2(g)+I2(s)=2HI(g)

Which of the following statements about the equilibrium is false?

A. If the system is heated, the right side is favored

B. This is a heterogeneous equilibrium

C. If the pressure on the system is increased by changing the volume, the left side is favored

D. Adding more H2(g) increases the equilibrium constant

E. Removing HI as it forms forces the equilibrium to the right

In reactions a, b, and c, carbon has undergone oxidation as its oxidation number has increased. In reactions d and e, carbon has undergone reduction as its oxidation number has decreased. The change in oxidation number indicates the transfer of electrons during the reactions.

a. In the reaction C + 2 Cl2 ⟶ CCl4, carbon has undergone oxidation. The oxidation number of carbon has increased from 0 in the element form to +4 in CCl4.

b. In the reaction 2 C + O2 ⟶ 2 CO, carbon has undergone oxidation. The oxidation number of carbon has increased from 0 in the element form to +2 in CO.

c. In the reaction C + O2 ⟶ CO2, carbon has undergone oxidation. The oxidation number of carbon has increased from 0 in the element form to +4 in CO2.

d. In the reaction C2H2 + I2 ⟶ C2H2I2, carbon has undergone reduction. The oxidation number of carbon has decreased from 0 in C2H2 to -1 in C2H2I2.

e. In the reaction C + 2 H2 ⟶ CH4, carbon has undergone reduction. The oxidation number of carbon has decreased from 0 in the element form to -4 in CH4.

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Answer:

William Crookes????????????????

For the electron in the hydrogen atom, the sets of observable below are compatible observable is-

The total energy, the magnitude of the orbital angular momentum and its component along the z-axis.

A hydrogen atom has one positively charged proton and one negatively charged electron, making it overall neutral. The hydrogen ion has an electric charge of one when it loses that one electron to become an ion.

In hydrogen gas, each hydrogen molecule is made up of two hydrogen atoms that are bound together. Similarly, two oxygen atoms combine to form an oxygen molecule.

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They change the composition of matter to change the properties of matter.

There is matter all around you. All matter is made up of very small particles, including atoms and molecules. The objects you see and touch on a daily basis were constructed from those atoms. Anything that has mass and occupies space (has volume) is considered matter.

The quantity of matter in an item is its mass. A statue made of lead (Pb) or another little object with a lot of mass may be present. You might have a massive object with a small mass.

Additionally, you ought to be aware of the distinction between matter and weight. Weight is a measure of gravity's pull, whereas mass is a measure of the substance of an object.

Thus, They change the composition of matter to change the properties of matter.

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The material with the lower boiling point vaporizes first when heated, then condenses and collects.

The heat that is generated during the condensation process of higher boiling vapor is what leads to the process of vaporization. Because it has such a huge surface area, the packing enables vapors to move freely between the ascending and descending directions. In the process of evaporation, the vaporization happens at a temperature lower than the boiling point, whereas in the distillation process, the vaporization happens at the boiling point.

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Cooling the reaction mixture before adding water helps to prevent premature precipitation of the product and ensures better control of the precipitation process, yielding a higher-purity product.

To avoid early or uncontrolled precipitation, which can result in reduced product purity, the reaction mixture is frequently cooled before water is added to precipitate the product. As a result of the product's reduced solubility in the solvent and slowed molecular mobility, cooling increases the likelihood that it may precipitate.

Additionally, cooling might lessen adverse effects that could happen at higher temperatures. In many chemical processes, it enables greater control of the precipitation process, resulting in a larger yield and a purer product.

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Chlorine may be added to water in a continuous, c.) Low dose method to initially disinfect a pipeline.

Chlorine can be added in a continuous low dose to maintain disinfection in the pipeline. This method is often used to prevent the growth of bacteria and other microorganisms in the water. Alternatively, a slug method may be used for an initial shock treatment, where a higher concentration of chlorine is added to the pipeline. Tablet or air injection methods may also be used for disinfection, but they are less commonly employed than the continuous or slug methods. Regardless of the method used, it is important to ensure that the chlorine is properly mixed and that the water is adequately monitored to ensure safe levels of chlorine and other content loaded in the water.

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Answer:

a: milliliters and grams | b: heat | c: force | d: solid | e: attraction

Explanation:

A: milliliters are cubic and grams are weight.

b: heat make particles go faster

c: thus more collisions and temperature and force

d: solid, they can't move, just vibrate

e: attraction

Answer:

Organic matter composted with earthworms, often known as vermicompost, has been demonstrated in studies to have disease-suppressing qualities. The earthworms loosen the soil and enrich it with humus. As a result, they are known as farmer's pals. They help the crops grow healthier and over the time have earned farmers trust.

Explanation:

Hope this helps in some way!

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Nuclear fission occurs when a nucleus breaks up into two equal fragments that release and separate more atoms. So, the correct option is B.

Nuclear fission is a process in which the nucleus of an atom breaks apart into two or more smaller nuclei. This process releases a significant amount of energy.

This energy is utilized in various applications, including nuclear power generation and nuclear weapons. Nuclear fission reactions are carefully controlled in nuclear power plants to ensure the sustained release of energy without leading to uncontrolled chain reactions. Hence the correct option is B.

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The equilibrium constant Kc is approximately 4047.7. The balanced chemical equation for the reaction is:

A + 2B ⇌ 2C

Using the concentrations at each time point, we can calculate the reaction quotient Qc.

At t=0, Qc = [C]² / ([A][B]²) = 0 / (0.150 x 0.100²) = 0

At t=50, Qc = [C]² / ([A][B]²) = (0.050)² / (0.125 x 0.075²) = 0.8889

At t=100, Qc = [C]² / ([A][B]²) = (0.100)² / (0.100 x 0.050²) = 8.0000

At t=150, Qc = [C]² / ([A][B]²) = (0.125)² / (0.075 x 0.025²) = 266.6667

At t=200, Qc = [C]² / ([A][B]²) = (0.138)²/ (0.050 x 0.012²) = 4047.6875

At equilibrium, Qc = Kc, so we can use the values at any time point where the reaction has reached equilibrium to determine Kc. At t=200, the reaction has essentially reached equilibrium since the change in concentration is small compared to the initial concentrations.

Qc = Kc = (0.138)² / (0.050 x 0.012²) = 4047.6875

Therefore, the equilibrium constant Kc is approximately 4047.7.

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Full Question ;

They initiate a chemical reaction and record the following concentrations as a function of time: What is the value of the equilibrium constant K?

An object sliding on a surface eventually stops due to friction.

Friction is a force that opposes motion between two surfaces that are in contact with each other. When an object is sliding on a surface, there is friction between the object and the surface, which acts in the opposite direction to the motion of the object.

Friction is caused by the microscopic irregularities on the surfaces that are in contact with each other. As the object slides along the surface, these irregularities cause interlocking between the object and the surface, which resists the motion of the object.

As an object slides on a surface, the frictional force gradually slows it down until it comes to a stop. The amount of time it takes for an object to stop sliding depends on factors such as the initial speed of the object, the mass of the object, and the strength of the frictional force.

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Answer:

a

Explanation:

Just add the PARTIAL pressures together

           to get the TOTAL pressure = 100 torr

Answer:

sodium example salt and soy sauce

potassium example meat milk fresh fruits