HELP!!!! question 2!!!

3H₂(g)+N₂(g)——> 2NH₃ (g) , here the volume of NH₃(g) measured at STP is produced when 2.15 L of H₂(g) reacts is approximately 1.58 L of NH₃ gas will be produced when 2.15 L of H₂ reacts at STP.

3H₂(g) + N₂(g) → 2NH₃ (g)

3 moles of H₂ reacts to produce 2 moles of NH3. Therefore, one need to first calculate the number of moles of H₂ in 2.15 L.

PV = nRT

P= is the pressure (STP has a pressure of 1 atm), V =is the volume in liters, n is the number of moles, R= is the ideal gas constant (0.0821 L·atm/mol·K), T =is the temperature in Kelvin (STP has a temperature of 273 K).

Here, 

n(H₂) = (P(H₂) × V(H₂)) / (R × T)

Assuming the pressure of H₂ is also 1 atm at STP, and substituting the values:

n(H₂) = (1 atm × 2.15 L) / (0.0821 L·atm/mol·K × 273 K) n(H₂) ≈ 0.0954 mol

According to the balanced equation, 3 moles of H₂ react to produce 2 moles of NH3. Therefore, one can determine the number of moles of NH₃ produced:

n(NH₃ ) = (2/3) × n(H₂) n(NH₃ )

≈ (2/3) × 0.0954 mol n(NH₃ )

≈ 0.0636 mol

V(NH₃ ) = (n(NH₃  × R × T) / P(STP)

Substituting the values:

V(NH₃ ) = (0.0636 mol × 0.0821 L·atm/mol·K × 273 K) / (1 atm) V(NH₃ )

≈ 1.58 L

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The binding energy of Lithium-7 is 28.3 MeV per nucleon (or 120.3 kJ/mol nucleons). This is the energy required to break up the nucleus into its constituent protons and neutrons.

The binding energy of a nucleus is determined by the mass of the nucleus minus the sum of the masses of the individual protons and neutrons that make up the nucleus.

For Lithium-7, this means that the mass of the nucleus (7.016 g/mol) minus the sum of the masses of the individual protons (3.0148 g/mol) and neutrons (4.0090 g/mol) gives a binding energy of 28.3 MeV per nucleon (or 120.3 kJ/mol nucleons).

This binding energy is the energy that holds the nucleus of Lithium-7 together.

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Answer:

A

Explanation:

A solid that dissolves in water produce alkaline solutions

ex. sodium reacts with water to form sodium hydroxide – caustic soda

Answer:

Explanation:

its d

Answer:

D

Explanation:

(CH3)4N+  is quarternary

Chlorhexidine and alexidine are: used in mouthrinses and are effective against plaque formation.

Chlorhexidine is a disinfectant and antiseptic. It is used for preventing dental plaque, treating yeast infections of the mouth and cleaning wounds.

Chlorhexidine interacts with components of toothpaste and forms salts of low solubility and antibacterial activity.

Alexidine is an antimicrobial agent, used in mouth washes as antiplaque cleaner. It is better for use than chlorhexidine because it is relatively non-toxic

Chlorhexidine and alexidine were synthesized in 1950s.

They inhibit a dental plaque formation by 70%.

Dental plaque is a biofilm of microorganisms that grows in the mouth.

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Answer:

it's C

Explanation:

because it exhaled the carbon dioxide

Answer:

The answer is "1".

Explanation:

It is the lone pairs at, which the central atom provides the molecular and the polarity. It is only for substances with just a central atom, for which the molecules with only one central atom and only one of the solitary paired were required, that's why in this question the "1" is the correct answer.

Answer: 340°C

Explanation: To calculate the temperature we have a formula:

                                      q=mcΔT-------------(1)

Given that q=2.50kJ

                  m=22.0g

                   c=0.385J/g°C

                    T1=45°C

ΔT=change in Temperature(T2-T1)

Now calculate the temp substitute these values in  euation(1)

                    2.50= (22.0*0.385)(x-45)

                      2.50 = 8.47(T2-45)

                     2.50=8.47T2-381  

                      T2=340°C

Hence,the final temperature of cu ic 340°C

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Answer:

Earthquake...

Explanation:

I mean, its kinda the only one that makes sense aha

And took test!

The word earthquake identifies the shaking that results from movement under Earth's surface.

Hence, option 1 is the answer.

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In the given question, 0.550 J/g-°C is the specific heat of the metal. The correct answer is option a.

Specific heat is defined as the amount of heat energy needed to raise the temperature of one unit of mass of a substance by one degree Celsius (or one Kelvin).

To calculate the specific heat of the metal, we can use the equation:

q(metal) = -q(water)

where q(metal) is the heat absorbed by the metal, and q(water) is the heat released by the water. The negative sign indicates that the heat lost by the water is equal in magnitude to the heat gained by the metal.

c(metal) = [m(water) \(\times\) c(water) \(\times\) ΔT] / [m(metal) \(\times\) ΔT]

where,

c(metal) is the specific heat of the metal,

m(water) is the mass of the water,

c(water) is the specific heat of water,

ΔT is the change in temperature and

m(metal) is the mass of the metal.

Substituting the given values, we get:

c(metal) = [100.0 g \(\times\) 4.18 J/g-°C \(\times\) (25.7°C - 15.0°C)] / [72.0 g \(\times\) (105.3°C - 25.7°C)]

c(metal) = 0.550 J/g-°C

Therefore, the specific heat of the metal is option a. 0.550 J/g-°C.

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The conversion of each of the measurements given to the new unit stated using the factor label method is as follows:

1 Foot = 30.48 cm.

∴ 26 cm = 26/30.48 = 0.853 foot.

1lb = 453.59 g.

16 lb = 453.59 × 16 = 7257.48 g.

1 year = 365 days; 1 day = 24 hours; 1 hour = 60 minutes; 1 minute = 60 sec.

1 year = 365 × 24× 60× 60 = 31,536,000 seconds.

1 mile = 1.60 km.

3.5 mile = 3.5 × 1.60 = 5.63 km.

The factor label method may be defined as a type of technique that is significantly utilized in order to convert one unit of measurement into the other with the utilization of the conversion factor.

Therefore, the conversion of each of the measurements given to the new unit stated using the factor label method is well-described above.

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Answer:

magnesium

Explanation:

Magnesium has lesser valens electron than Ca, therefore the force for Mg between the nucleus and outer orbit of electron is lesser. Also, the radius will increase

Answer:

Gallium

has a larger ionic radius than (ca).

Answer: Al:Al2O3 = 3: 1

Explanation:

the answer is 1

We would need 11.0 moles of water to react with 5.50 moles of calcium carbide to produce calcium hydroxide and acetylene gas.

The chemical equation given represents the reaction between calcium carbide (CaC2) and water (H2O) to form calcium hydroxide (Ca(OH)2) and acetylene gas (C2H2). In order to determine the number of moles of water needed, we must use stoichiometry. Stoichiometry is the study of the quantitative relationships between the reactants and products in a chemical reaction. In order to use stoichiometry, we must first balance the equation.

The balanced equation is as follows:
CaC2 + 2H2O → Ca(OH)2 + C2H2
From the balanced equation, we can see that for every mole of CaC2, we need 2 moles of H2O. Therefore, to determine the number of moles of H2O needed, we must multiply the number of moles of CaC2 by the ratio of moles of H2O to moles of CaC2.
If we have 5.50 mol of CaC2, we can calculate the number of moles of H2O needed as follows:
5.50 mol CaC2 × (2 mol H2O / 1 mol CaC2) = 11.0 mol H2O
Therefore, we would need 11.0 moles of water to react with 5.50 moles of calcium carbide to produce calcium hydroxide and acetylene gas.

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The molarity of a 97.62 (m/m) % acetic acid solution given that the solution density is 1.05 g/ml is 17.5M.

Reason:

Glacial acetic acid is 100% acetic acid. The MW of acetic acid is 60. The density of acetic acid (100%) is 1.05. So in 1 L we have 1.05 Kg. The number of moles of acetic acid is then 1050 g divided by 60 = 17.5 mol. So the molarity is 17.5 mold/L or 17.5 M.

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Pathogenic bacteria are the most problematic in the food industry. The term "pathogenic" refers to any bacteria that are capable of causing illness when consumed by humans or animals.

Option A is correct

Pathogenic bacteria are often found in foods that are not cooked or handled correctly. This includes raw meat, unpasteurized dairy products, and foods that are stored at incorrect temperatures for an extended period of time. It is crucial for food industry professionals to follow strict safety protocols to minimize the risk of pathogenic bacteria contaminating their products, leading to foodborne illnesses.Foodborne illnesses can be caused by a variety of microorganisms, including bacteria, viruses, and parasites. Pathogenic bacteria are a significant concern in the food industry, as they can cause serious illness and even death in vulnerable populations such as young children, pregnant women, and the elderly. The most problematic bacteria in the food industry are those that are pathogenic and are capable of multiplying quickly in the food environment. Pathogenic bacteria can cause food poisoning, which is a severe illness that can result in dehydration, fever, vomiting, and diarrhea.

The symptoms can be severe and can lead to hospitalization or even death if left untreated. The most common pathogenic bacteria found in food are Salmonella, Listeria, and E.coli. These bacteria are often found in raw or undercooked meat, unpasteurized dairy products, and fruits and vegetables that are not washed correctly. It is essential for food industry professionals to follow strict safety protocols to prevent the growth and spread of these bacteria. Proper handwashing, storage, and cooking techniques can help minimize the risk of foodborne illnesses caused by pathogenic bacteria. In conclusion, pathogenic bacteria are the most problematic in the food industry. Food safety protocols should be followed to minimize the risk of foodborne illnesses caused by these bacteria.

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Okay, let's think through this step-by-step:

1) The initial equilibrium lies on the right side, favoring the products (H2 and O2 gases), because the standard enthalpy change (AH) is positive for this reaction, meaning the products are more stable.

2) When we increase the volume of the container, the pressure decreases according to Boyle's law (P=k/V).

3) A decrease in pressure favors the side with the greater number of moles of gases. In this case, the product side has 2 moles of gas (H2 + O2), so the equilibrium will shift to the right.

4) Therefore, when the volume increases, the equilibrium will shift further in favor of the products (H2 and O2 gases).

The answer is a: It will shift in favor of the products.

Let me know if this makes sense! I can re-explain anything that is unclear.

The statement "100% iodine and 95% alcohol are rapidly effective disinfectants" is False.

What are disinfectants?

Disinfectants are chemical agents that can destroy or remove harmful microorganisms, viruses, and bacteria from various surfaces, areas, and substances. The effectiveness of a disinfectant can be determined by its ability to kill bacteria, viruses, and other microorganisms effectively.

What are the effective disinfectants?

The following are the effective disinfectants: Chlorine. Chlorine is one of the most effective disinfectants, as it has a broad spectrum of antimicrobial activity. It is highly effective against bacteria, viruses, and fungi, among other microorganisms. Iodine. Iodine is another effective disinfectant, but it has a narrow range of antimicrobial activity. It is highly effective against bacteria, viruses, and fungi.Alcohol. Ethanol and isopropanol are two types of alcohol that are commonly used as disinfectants. They have broad-spectrum antimicrobial activity, making them effective against bacteria, viruses, and fungi.

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Answer:

2H₂O → 2H₂ + O₂

         2NaCl → 2Na + Cl₂

Explanation:

         2H₂O → 2H₂ + O₂

         2NaCl → 2Na + Cl₂

The reactions shown above is a decomposition.

In a decomposition reaction or cracking, two or more products are formed from a single product.

The breakdown of a compound into its components as individual elements or other compounds falls into this category of reactions.

Cracking is a sort of decomposition reactions that is used in petroleum industries to sort the fractions of a compound.

The term for building a strong military in hopes that other countries won't attack is deterrence. Option A is correct.

Deterrence is a strategy that involves creating a strong military and threatening to use it if any other country attempts to launch an attack. This strategy aims to prevent conflicts from occurring by making the potential aggressor think twice before initiating an attack.

During the Cold War, deterrence was a key strategy used by both the United States and the Soviet Union. Both countries built up their military strength and used it as a deterrent to prevent the other from launching an attack.

Overall, deterrence is a crucial aspect of national security and is often used by countries to maintain peace and stability in the international arena. Therefore, option A is correct.

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An acid is a substance that increases the hydrogen ion concentration of an aqueous solution (Option A).

When an acid is added to a solution, it donates hydrogen ions (H⁺) to the solution, resulting in an increase in the concentration of hydrogen ions. This increase in hydrogen ion concentration lowers the pH of the solution, making it more acidic.

Acids are defined by their ability to donate protons (H+) to other substances. This process is known as acid dissociation and is responsible for the characteristic properties of acids, such as their sour taste and ability to react with metals.

While acids are often thought of as dangerous or corrosive substances, they are also essential to many biological processes. For example, stomach acid is necessary for digestion, and many enzymes in our bodies require an acidic environment to function properly.

Overall, the ability of acids to donate hydrogen ions is a fundamental property that has important implications for both chemistry and biology. Hence, the correct answer is Option A.

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Answer:

rusting, cooking and burning wood

The correct answer to the first part of your question is option (c): Energy is released by water vapor as it condenses.

When water vapor condenses into liquid water, it undergoes a phase change from a gaseous state to a liquid state. During this phase change, energy is released in the form of latent heat. This release of energy occurs because the water molecules in the vapor phase are more energetic and have higher kinetic energy compared to the water molecules in the liquid phase.

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Answer:

HCl is a polar covalent compound, because of electronegativity difference between Cl(3.5) and hydrogen (2). Hence in this way, the bond between HCl breaks and they formed ions in the polar solvent like water .

Answer:

c

Explanation:

Answer:

%m/v =70%

Explanation:

El %m/v es una unidad de concentración que se define como cien veces la división entre la masa de una sustancia (En gramos) y el volumen total en el que esta sustancia se encuentra (en mL).

En el problema, debemos hallar la masa de etanol (Alcohol) y el volumen total de la solución.

Masa alcohol:

Ya te la dan en el problema: 105g

Volumen solución:

Volumen agua: 15mL

Volumen etanol: 105g × (1mL / 0.798g) = 131mL

Volumen Jabón líquido: 4.5g × (1mL / 1.5g) = 3mL

Volumen: 15mL + 131mL + 3mL

149mL

Así, el %m/v de alcohol en la solución es:

%m/v = (105g / 149mL) × 100

Answer

1.0 mol

Explanation

Given:

Volume, V = 5.0 L

Temperature, T = 215 K

Pressure, P = 342 kPa

The gas constant, R = 8.31 L kPa/mol K

What to find:

The number of moles of the gas sample.

Step-step-solution:

The number of moles of the gas can be determine using the ideal gas equation formula:

Put the given values into the formula and calculate for n:

The number of moles of the gas sample is 1.0 mol.