At 20°C a gas has a volume of 16.00 L. What will the volume be at 175.0 °C?

The solubility product constant (Ksp) is a measure of the solubility of a sparingly soluble salt. A larger Ksp value indicates a higher solubility of the salt in water.

Comparing the Ksp values given, we can see that [tex]PbCl_{2}[/tex] has the largest Ksp value (1.6 x [tex]10^-5[/tex] ) among the three lead salts. This means that [tex]PbCl_{2}[/tex] has the highest solubility among the three salts at 25 degrees Celsius.

On the other hand, Pbi2 has a much smaller Ksp value (1.4 x 10^-8), indicating that it has a much lower solubility in water at 25 degrees Celsius. [tex]Pb(OH)_{2}[/tex] has an even smaller Ksp value (1.2 x 10^-15), making it the least soluble of the three salts.

It is important to note that factors such as temperature, pressure, and pH can also affect the solubility of a salt. However, based on the given information, we can conclude that [tex]PbCl_{2}[/tex] would be the most soluble of the three lead salts in water at 25 degrees Celsius.

Learn more about  Ksp value

https://brainly.com/question/13032436

#SPJ4

23 grams of water at 95°C can lose a maximum of 8883.64 Joules of heat before freezing completely.

To answer your question, we need to calculate the heat loss required to lower the temperature of 23 grams of water from 95 degrees Celsius to 0 degrees Celsius, which is the freezing point of water. The specific heat capacity of water is 4.184 Joules per gram per degree Celsius.

So, the initial energy of the water is:

E1 = m x c x ΔT
E1 = 23 g x 4.184 J/g°C x (95°C - 0°C)
E1 = 8883.64 J

Where E1 is the initial energy of the water, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.

The final energy of the water at 0°C is:

E2 = m x c x ΔT
E2 = 23 g x 4.184 J/g°C x (0°C - 0°C)
E2 = 0 J

So, the maximum amount of heat in joules that 23 grams of water at 95°C can lose before freezing completely is:

ΔE = E1 - E2
ΔE = 8883.64 J - 0 J
ΔE = 8883.64 J

Learn more about joules here: brainly.com/question/25982371

#SPJ11

The correct option is D. A gas is released and a black solid forms.

Carbon, hydrogen, and oxygen atoms make up sugar. When heated over a candle, these materials react with the fire and turn into liquids. Heat causes the sugar's atoms to interact with the oxygen in the air, forming new atomic groups. Energy is released during this chemical reaction in the form of smoke and black soot.

The main functions of sugars include their ability to sweeten things, maintain and intensify flavours, act as antioxidants and preservatives, and interact with water to change how it behaves. Fermentation, caramelization, Maillard reactions, or the creation of browning compounds, are examples of chemical processes.

To know more about solid visit:-

https://brainly.com/question/17061172

#SPJ1

Question:

During a science class investigation, a teacher places a small amount of sugar in a beaker and then heats it over a candle. Which of the following would be the best evidence that a change in the chemical properties of the sugar has taken place?

A. The sugar changes color.

B. The sugar dissolves in the water.

C. The sugar melts and turns into a liquid.

D. A gas is released and a black solid forms.

After being exposed to organophosphate insecticide, Decontamination should begin with : C. Place the patient in a well-ventilated, isolated area.

What should be done after being exposed to organophosphate insecticide:

For the safety of other patients and staff members, place the patient in a well-ventilated and isolated area for decontamination. After donning personal protective equipment,  gloves and goggles, carefully remove  patient's clothing. Then brush off the insecticide, if it was of a dry type.

Decontaminate patient with copious amount of water. Do not apply any neutralizing agent because it may cause exothermic reaction that produces heat.

To know more about Organophosphate insecticide:

brainly.com/question/28547821

#SPJ4

Complete question:

After being exposed to an organophosphate insecticide, a landscaping worker presents to the emergency department. Decontamination should begin with which step?

A. Brush the insecticide off the patient.

B. Remove the patient's clothing.

C. Place the patient is a well-ventilated, isolated area.

D. Apply a neutralizing agent.

The new pressure of the helium gas in the 2.00 L container is 0.494 atm.

What is new pressure?

According to Boyle's Law, for a fixed amount of gas at a constant temperature, the pressure and volume of the gas are inversely proportional to each other.

Using Boyle's Law, we can write:

P1V1 = P2V2

where P1 and V1 are the initial pressure and volume of the gas, and P2 and V2 are the new pressure and volume of the gas, respectively.

Given that the initial pressure P1 is 0.988 atm and the initial volume V1 is 1.00 L, and the new volume V2 is 2.00 L, we can solve for the new pressure P2 as follows:

P1V1 = P2V2

0.988 atm × 1.00 L = P2 × 2.00 L

P2 = (0.988 atm × 1.00 L) / 2.00 L

P2 = 0.494 atm

Therefore, the new pressure of the helium gas in the 2.00 L container is 0.494 atm.

What is volume of the gas?

The volume of a gas refers to the amount of space that the gas occupies. The volume of a gas can be measured in a number of ways, depending on the conditions under which the gas is being measured.

At standard temperature and pressure (STP), which is defined as 0°C (273.15 K) and 1 atmosphere (atm) of pressure, the volume of 1 mole of any gas is 22.4 liters (L). This is known as the molar volume of a gas at STP.

The volume of a gas can vary depending on the temperature, pressure, and the amount of gas present. As a general rule, the volume of a gas will increase as the temperature increases and/or the pressure decreases, and will decrease as the temperature decreases and/or the pressure increases.

To know more about pressure, visit:

https://brainly.com/question/28988906

#SPJ1

If the ionization enthalpy of an element such as carbon (C) were to increase, it would require more energy to remove an electron from its outermost shell.

An element is a pure substance made up of only one type of atom. In other words, an element consists of atoms that have the same number of protons in their nuclei. This number of protons, known as the atomic number, determines the unique chemical and physical properties of each element. There are currently 118 known elements, with each element represented by a unique symbol, such as H for hydrogen, O for oxygen, and Au for gold. Elements can be classified into groups based on their similar properties and arranged in the periodic table, which is a table that displays all the known elements in order of increasing atomic number.

To know more about element visit :

https://brainly.com/question/13794764

#SPJ1

Kinetic molecular theory says that as water molecules absorb energy, their motion and temperature increase and the sample becomes warm

The average kinetic energy of the molecules will rise as the temperature rises, according to the kinetic molecular theory. The edge of the container will probably be more frequently struck by the particles as they travel more quickly.

The average molecular velocity of a gas increases as its temperature rises; for example, doubling the temperature will result in a four-fold increase in molecular velocity. More momentum and kinetic energy will be transferred to the container's walls in collisions with them.

learn more about kinetic molecular theory

https://brainly.com/question/134712

#SPJ1

Approximately 50 grams mass of [tex]KNO_{3}[/tex] will dissolve in 50 mL of water at 60°C.

What is mass?

Mass is a fundamental physical quantity that refers to the amount of matter in an object. It is a scalar quantity that measures the inertia of an object.

The solubility of  [tex]KNO_{3}[/tex] in water depends on temperature. At 60°C, the solubility of  [tex]KNO_{3}[/tex] is approximately 100 g/100 mL of water.

To determine the mass of  [tex]KNO_{3}[/tex] that will dissolve in 50 mL of water at 60°C, we can use the following equation:

mass of  [tex]KNO_{3}[/tex]  = (solubility of [tex]KNO_{3}[/tex]  at 60°C) × (volume of water)

mass of [tex]KNO_{3}[/tex]  = (100 g/100 mL) × (50 mL)

mass of [tex]KNO_{3}[/tex]  = 50 g

Therefore, approximately 50 grams of  [tex]KNO_{3}[/tex] will dissolve in 50 mL of water at 60°C.

What is solubility?

Solubility is the ability of a substance, called the solute, to dissolve in a solvent to form a homogeneous solution. The solubility of a substance depends on the nature of the solute, the solvent, and the conditions under which the solution is formed, such as temperature, pressure, and concentration.

The amount of solute that can dissolve in a given amount of solvent at a particular temperature and pressure is known as the solubility of the solute. Solubility is typically expressed in units of mass per unit volume, such as grams per liter (g/L) or moles per liter (mol/L).

The solubility of a substance can vary widely depending on the solvent. For example, water is a good solvent for many ionic and polar compounds, while nonpolar solvents like benzene and hexane are better at dissolving nonpolar substances like oils and fats.

To know more about solubility, visit:

https://brainly.com/question/26766449

#SPJ1

Complete question is: 50 grams mass of [tex]KNO_{3}[/tex] will dissolve in 50 mL of water at 60°C.

Mercury has the widest variation in surface temperatures between night and day of any planet in the solar system.

This statement is true. Mercury experiences the greatest temperature variation between night and day due to several factors. The main reasons are its proximity to the Sun, slow rotation, and lack of atmosphere.

During the daytime, temperatures on Mercury can reach up to 800°F (430°C) due to its close proximity to the Sun. This extreme temperature difference is due to the fact that Mercury's thin atmosphere is unable to regulate temperature and its slow rotation causes one side of the planet to be constantly facing the sun while the other is in perpetual darkness.

At night, temperatures can drop as low as -290°F (-180°C) because of its slow rotation and the lack of an atmosphere to retain heat. This results in the widest variation in surface temperatures between night and day of any planet in our solar system.

To know more about Mercury Variations in surface temperature:

https://brainly.com/question/16117265

#SPJ11

Mercury indeed has the widest variation in surface temperatures between night and day of any planet in the solar system. This is primarily due to its thin atmosphere, which cannot effectively retain heat, leading to extreme temperature fluctuations.

Mercury, being the closest planet to the sun, experiences extreme variations in temperature between its day and night sides. During the day, when the sun is overhead, the surface temperature on Mercury can rise to a scorching 430°C (800°F), which is hot enough to melt lead. However, as Mercury rotates and the sun sets, the temperature drops drastically to as low as -180°C (-290°F) at night.

The main reason for this extreme temperature variation is that Mercury has no atmosphere to regulate its surface temperature. Unlike Earth, which has an atmosphere that helps to distribute heat around the planet, Mercury's surface is directly exposed to the sun's radiation. This means that when the sun is shining on Mercury's surface, it heats up quickly and intensely, causing the temperature to rise to extreme levels.

Overall, the lack of an atmosphere and Mercury's proximity to the sun are the main factors contributing to the extreme temperature variations on the planet.

Learn more about atmosphere here:

https://brainly.com/question/11192430

#SPJ11

This is an exothermic reaction because energy is released during the reaction process as 108 kJ of energy are evolved when 1 mole reacts to form product.

When 1 mole reacts to form product according to the given equation, 108 kJ of energy are evolved, which means that energy is being released by the reaction. This release of energy indicates an exothermic reaction as exothermic reaction is a chemical reaction that involves the release of energy.

Learn more about exothermic reaction here:

https://brainly.com/question/13014923

#SPJ11

Based on the fact that energy is being evolved, this reaction is exothermic.

This reaction is exothermic because energy is released (or "evolved") during the reaction. In exothermic reactions, energy is given off as the reactants transform into products, while in endothermic reactions, energy is absorbed from the surroundings. Since 108 kJ of energy is evolved in this case, it confirms that the reaction is exothermic.

To know more about Exothermic Reactions:

https://brainly.com/question/14079389

#SPJ11

PEL levels for a particular substance, such as Antimony, may vary depending on the country, jurisdiction, and specific industry or work environment.

"PEL" stands for "Permissible Exposure Limit," which is a term used in occupational health and safety regulations to denote the maximum amount or concentration of a hazardous substance that a worker may be exposed to over a specified time period without adverse health effects.

Therefore, it is important to refer to the relevant occupational health and safety regulations or guidelines in your specific area or industry for accurate and up-to-date information on the PEL levels for Antimony or any other hazardous substance.

These regulations are typically established by government agencies, such as the Occupational Safety and Health Administration (OSHA) in the United States or the Health and Safety Executive (HSE) in the United Kingdom.

Learn more about PEL levels here: https://brainly.com/question/5428869

#SPJ1

The solubility of the CuI in the 0.53 m HCN solution. The Ksp of CuI is 1.1 × 10⁻¹² and the Kf for the [Cu(CN)²]⁻ complex ion is 1 × 10²⁴ is 0.27 M.

The ability of the substance to dissolve in the solvent. The solute will dissolves in the solvent which can  be the solid, the liquid or the gas. The Increase in the temperature will increases in the solubility of the substance.

The equation is as :

CuI --->  Cu⁺   +   I⁻

The value of the Ksp = 1.1 × 10⁻¹²

Cu⁺2CN⁻  ----- >  [Cu(CN)²]⁻

Kf =  1 × 10²⁴

CuI  +   2CN⁻  ---->   [Cu(CN)²]⁻  +  I⁻

K = s² / ( 0.53 - s)

1 × 10⁵ = s² / ( 0.53 - s)

s = 0.27 M

The solubility of the CuI is 0.27 M.

To learn more about solubility here

https://brainly.com/question/9489565

#SPJ4

The respiratory disease characterized by decreased chloride ion diffusion out of cells and dehydrated respiratory secretions is cystic fibrosis. Option C is correct.

Cystic fibrosis is a genetic disorder that affects the exocrine glands, including those in the lungs, pancreas, and sweat glands. The condition causes a thick and sticky mucus to build up in the lungs, making breathing difficult and increasing the risk of respiratory infections.

The decreased chloride ion diffusion out of cells is due to a defect in the cystic fibrosis transmembrane conductance regulator (CFTR) protein, which is responsible for controlling the movement of salt and water in and out of cells. This results in dehydrated respiratory secretions, as well as thick and sticky mucus in other organs. While there is no cure for cystic fibrosis, treatment focuses on managing symptoms and preventing complications. Hence Option C is correct.

To learn more about cystic fibrosis, here

https://brainly.com/question/30754172

#SPJ4

In order to calculate the pH of a salt solution generated from a weak acid and a weak base using a single ice chart, a few things must be true.

Firstly, the weak acid and weak base must react to form a salt and water. This is important because the salt will affect the pH of the solution. Secondly, the acid and base must be of equal strength.

If one is stronger than the other, the resulting solution will either be acidic or basic, depending on which is stronger. Finally, the initial concentrations of the acid and base must be known,

as well as the equilibrium constant of the acid-base reaction. With this information, the single ice chart can be used to determine the concentrations of all species in the solution at equilibrium, which can then be used to calculate the pH of the solution.

To learn more about : solution

https://brainly.com/question/25326161

#SPJ11

True. Absorbance values above 1.00 indicate that the sample is heavily concentrated with solutes, which can limit the amount of light that passes through the sample.

Dilution is necessary to reduce the concentration of solutes in the sample and allow more light to pass through, enabling accurate measurement of the absorbance values.

Dilution involves adding a solvent to the sample to decrease its concentration while maintaining the same proportion of solutes. The diluted sample can then be re-analyzed to obtain absorbance values within the linear range of the spectrophotometer.

It is important to note that proper dilution factors must be calculated and applied accurately to avoid errors in the final results. Dilution is a commonly used technique in many scientific fields, including biochemistry, molecular biology, and environmental science.

To learn more about : solutes

https://brainly.com/question/25326161

#SPJ11

The spectrum from an incandescent light bulb with a filament is a continuous spectrum. This means that the light emitted contains all colors of the visible spectrum, appearing as a smooth, uninterrupted rainbow

Electrons in an atom can only gain energy by leaving the atom and creating an ion. They can move between discrete energy levels or escape the atom if given enough energy. Electrons can have any energy below the ionization energy within the atom or escape if given enough energy.

However, electrons can have any energy within the atom and cannot be given enough energy to cause them to escape the atom. They move between discrete energy levels within the atom and cannot accept an amount of energy that causes them to escape the atom.

In contrast, an emission line spectrum appears as a series of bright lines against a dark background, while an absorption line spectrum appears as a series of dark lines against a bright background.

The type of spectrum emitted depends on the source of the light and the composition of the material emitting the light.

To learn more about : spectrum

https://brainly.com/question/2187993

#SPJ11

Answer:

They're equal.

Explanation:

Giving an idea let's use the question:

This would depend on the temperature and pressure conditions that the helium gas is being stored under.

You see, gases have no fixed volume. They will expand when the temperature increases and/or the applied pressure decreases. On the other hand, the gas will contract when cooled or pressure is applied. So one mole of helium could occupy almost any volume, depending on how much you compress it or how cool you keep it.

However, if your helium gas is stored under standard temperature and pressure conditions (STP)(0 C and 101.3 kPa), then it would fill a box with a volume of 22.4 L. This volume is known as the standard molar volume and is the same for any gas at STP.

I will let you come up with a set of dimensions for a box that could satisfy this volume.

Levulinic acid can be produced from various reactants, including biomass and sugars such as glucose, fructose, and sucrose.

The following combination of reactants could be used to produce levulinic acid:

However, in terms of the tobacco industry, levulinic acid is commonly produced from tobacco leaves themselves. The leaves are subjected to a process called acid hydrolysis, which breaks down the cellulose and hemicellulose in the plant material into sugars. These sugars are then used as reactants in the production of levulinic acid, which is used to make nicotine more addictive.

Levulinic acid is used by the tobacco industry to make nicotine more addictive by converting it into a more stable and absorbable form. It is important to note, however, that nicotine addiction is a serious health concern and should be addressed through education and smoking cessation programs rather than through the manipulation of nicotine chemistry.

Learn more about acid hydrolysis here:

https://brainly.com/question/29622274

#SPJ11

Based on the information provided, you should choose a 20 ml syringe for compounding the sterile order for chlorothiazide, as it will allow you to withdraw the exact calculated amount needed.

You should pick a 30 ml syringe to withdraw 20 ml of chlorothiazide. This will allow you to withdraw the medication with enough room in the syringe to prevent any spills or contamination. It is always important to choose a syringe size that is larger than the volume you need to withdraw to ensure accuracy and safety in compounding sterile orders.
Based on the information provided, you should choose a 20 ml syringe for compounding the sterile order for chlorothiazide, as it will allow you to withdraw the exact calculated amount needed.

Visit here to learn more about   chlorothiazide: https://brainly.com/question/13254931
#SPJ11

The enthalpy of the reaction as seen from the calculations is - 137.2 kJ/mol.

To determine the enthalpy change of a reaction, we need to know the difference between the enthalpy of the products and the enthalpy of the reactants. This difference is known as the enthalpy change or the heat of reaction.

The enthalpy change of a reaction can be calculated using the following formula:

ΔH = ΣnΔHf(products) - ΣmΔHf(reactants)

where ΔH is the enthalpy change of the reaction, n and m are the stoichiometric coefficients of the products and reactants, respectively, and ΔHf is the standard enthalpy of formation of the species.

Enthalpy of reaction = Enthalpy of products - Enthalpy of reactants

(-84.7) -(52.5 + 0)

- 137.2 kJ/mol

Learn more about enthalpy change:https://brainly.com/question/29556033

#SPJ1

The number of moles of the gas is about 1.37 moles.

The ideal gas equation relates the pressure, volume, temperature, and number of moles of an ideal gas in a closed system. The gas constant (R) is a proportionality constant that relates these four variables.

It is important to note that the ideal gas equation is only applicable to ideal gases, which are hypothetical gases that obey certain assumptions such as having no intermolecular forces and occupying no volume. Real gases deviate from these ideal behaviors under certain conditions, and thus the ideal gas equation may not accurately describe their behavior.

Knowing that;

PV = nRT

n = PV/RT

n = 1.35 * 25/0.082 * 300

n = 33.75/24.6

n = 1.37 moles

Learn more about ideal gas equation:https://brainly.com/question/28837405

#SPJ1

3.29 grams of nitrogen dioxide must reaction  with water to produce 2.25 g of nitric acid According to the following equation,

When oxygen and nitrogen interact at high temperatures in the atmosphere, NO and NO2 are both produced. Both the emissions of power generation plants and the exhaust fumes from vehicles and trucks are significant sources of nitrogen oxides.

In the process of creating chemicals like nitric acid, that's utilized to create synthetic commercial fertiliser, and adipic acid, that's utilized to create fibres like nylon and other synthetic items, nitrous oxide is produced as a byproduct. Waste.

To know more about reaction visit:

https://brainly.com/question/28984750

#SPJ1

According to the article published by J.D. Bauer et. al in 2010, the solvent used to grow the crystals of acetylsalicylic acid was ethanol.

The process of crystal growth involves dissolving the compound in a suitable solvent and then allowing it to slowly evaporate under controlled conditions to form well-defined crystals. Ethanol is a commonly used solvent for the growth of crystals due to its ability to dissolve a wide range of compounds, including organic molecules like acetylsalicylic acid.

The use of ethanol as a solvent for crystal growth of acetylsalicylic acid was carefully chosen to ensure that the crystals formed were of high quality and had a well-defined crystal structure. The crystal structure of acetylsalicylic acid is important because it determines the physical and chemical properties of the compound.

In conclusion, the use of ethanol as a solvent for the growth of acetylsalicylic acid crystals was a crucial step in the determination of the crystal structure of this important compound. The choice of solvent is an important factor to consider when growing crystals, as it can greatly affect the quality and properties of the crystals formed.

Know more about   ethanol   here:

https://brainly.com/question/281073

#SPJ11

The pH of the solution after the addition of NaOH is 4.83.

The chemical equation for the reaction is:

CH₃COOH + NaOH → CH₃COONa + H₂O

At the start of the titration, only the weak acid is present in the solution, and its concentration can be calculated using the formula:

C₁V₁ = C₂V₂

where C₁ is the initial concentration of CH₃COOH, V₁ is the initial volume of the solution (52.0 mL), C₂ is the final concentration of CH₃COOH (which is unknown), and V₂ is the final volume of the solution after the addition of NaOH (52.0 mL + 23.0 mL = 75.0 mL).

Rearranging the equation,

C₂ = (C₁V₁) / V₂

C₂ = (0.35 M x 52.0 mL) / 75.0 mL

C₂ = 0.243 M

This is the concentration of the weak acid after the addition of 23.0 mL of NaOH. The moles of NaOH added to the solution can be calculated as follows:

n(NaOH) = C(NaOH) x V(NaOH)

n(NaOH) = 0.40 M x 23.0 mL

n(NaOH) = 0.0092 mol

Since NaOH is a strong base, it completely reacts with the weak acid. The moles of CH₃COOH that are neutralized by the NaOH can be calculated as follows:

n(CH₃COOH) = n(NaOH)

n(CH₃COOH) = 0.0092 mol

The remaining moles of CH₃COOH can be calculated as follows:

n(CH₃COOH) = n(initial) - n(NaOH)

n(CH₃COOH) = (0.35 M x 52.0 mL) / 1000 mL - 0.0092 mol

n(CH₃COOH) = 0.0154 mol

The equilibrium expression for the dissociation of CH₃COOH is:

Kₐ = [H⁺][CH₃COO⁻] / [CH₃COOH]

At equilibrium, some of the CH₃COOH has dissociated into CH₃COO⁻ and H⁺. Since we know the initial concentration of CH₃COOH and the amount of CH₃COOH that has reacted with NaOH, we can calculate the concentration of CH₃COOH at equilibrium:

[CH₃COOH] = (n(CH₃COOH) / V₂) = (0.0154 mol) / (75.0 mL / 1000 mL/L) = 0.205 M

The concentration of CH₃COO⁻ at equilibrium is equal to the concentration of NaOH that has reacted with CH₃COOH:

[CH₃COO⁻] = n(NaOH) / V₂ = (0.0092 mol) / (75.0 mL / 1000 mL/L) = 0.123 M

To calculate the concentration of H⁺ at equilibrium, we can use the equilibrium expression and the fact that [H⁺] x [CH₃COO⁻] = Kₐ x [CH₃COOH]:

Kₐ = [H⁺][CH₃COO⁻] / [CH₃COOH]

We know that the concentration of H⁺ at equilibrium is 1.49 x 10^-5 M. To calculate the pH, we can use the formula:

pH = -log[H+]

pH = -log(1.49 x 10^-5)

pH = 4.83

To know more about pH, here

brainly.com/question/2288405

#SPJ4

The number of moles of caffeine is 0.00052 mol

To calculate the number of moles of caffeine in a 100 mg sample, we need to use the formula:

The molar mass of caffeine (C₈H₁₀O₂N₄) is 194.19 g/mol. Converting the mass of the sample to grams (100 mg = 0.1 g), we can plug in the values and solve for moles:

The mole is widely used in stoichiometry calculations, which involve determining the amount of reactants needed to produce a certain amount of products or the amount of products produced from a certain amount of reactants. It is also used in the calculation of molar mass, which is the mass of one mole of a substance, and in the conversion between mass, moles, and number of entities in chemical reactions. Therefore, the number of moles of caffeine in a 100 mg sample of caffeine is 0.00052 moles.

To learn more about moles, here

https://brainly.com/question/26416088

#SPJ4

Answer: option C

Explanation: As they belong to same group

9 pennies contain approximately [tex]2.13 x 10^23[/tex] atoms of copper.

To solve this problem, we need to use the following steps:

Determine the molar mass of copper.

Convert the mass of 9 pennies from grams to moles.

Use Avogadro's number to calculate the number of atoms of copper.

Step 1: The molar mass of copper (Cu) is approximately 63.55 g/mol.

Step 2: The mass of 9 pennies is:

9 pennies x 2.5 g/penny = 22.5 g

Converting this mass to moles, we get:

22.5 g / 63.55 g/mol = 0.354 moles

Step 3: Using Avogadro's number ([tex]6.022 x 10^23 atoms/mol)[/tex], we can calculate the number of atoms of copper:

Therefore, 9 pennies contain approximately[tex]2.13 x 10^23 a[/tex]toms of copper.

Learn more about molar mass

https://brainly.com/question/22997914

#SPJ4

To solve this problem, we can use the combined gas law formula, which is (P1 * V1) / T1 = (P2 * V2) / T2. Given the initial and final conditions of ozone gas, we need to find the pressure (P2) at 625 mL and 25°C.

Initial conditions:
P1 = 1.00 atm
V1 = 225 mL
T1 = 0°C + 273.15 = 273.15 K (convert to Kelvin)

Final conditions:
V2 = 625 mL
T2 = 25°C + 273.15 = 298.15 K (convert to Kelvin)
P2 = ? (This is the pressure we need to find)

Using the combined gas law formula, we get:

(1.00 atm * 225 mL) / 273.15 K = (P2 * 625 mL) / 298.15 K

Now, solve for P2:

P2 = (1.00 atm * 225 mL * 298.15 K) / (273.15 K * 625 mL)
P2 ≈ 0.659 atm

The pressure of the ozone gas at 625 mL and 25°C is approximately 0.659 atm.

Visit here to learn more about gas law   : https://brainly.com/question/27009857
#SPJ11

the molar mass of the unknown acid is approximately 141.1 g/mol.

a. To find the number of moles of acid in the solid sample, we first need to calculate the number of moles of NaOH used in the titration. We can do this using the equation:

moles NaOH = M NaOH x V NaO

where M NaOH is the molarity of the NaOH solution, and V NaOH is the volume of NaOH solution used at the equivalence point.

Substituting the given values, we get

moles NaOH = 0.300 mol/L x 0.04873 L = 0.014619 mol

Since NaOH and the unknown acid react in a 1:1 mole ratio, the number of moles of acid in the sample is also 0.014619 mol.

b. To find the molar mass of the unknown acid, we can use the equation

molar mass = mass of sample / number of moles of acid

Substituting the given values, we get:

molar mass = 2.06 g / 0.014619 mol = 141.1 g/mol

Learn more about molar  here:

https://brainly.com/question/8732513

#SPJ11

The number of moles in the acid is 0.014619 moles and the molar mass of the unknown monoprotic acid is 140.92 g/mol.

To find the number of moles of acid in the solid sample, first determine the moles of NaOH used in the titration. You can do this using the formula:

moles = volume (L) × concentration (M)
moles of NaOH = 48.73 mL × (1 L / 1000 mL) × 0.300 M = 0.014619 moles

Since it's a monoprotic acid, the moles of the acid are equal to the moles of NaOH at the equivalence point:
moles of acid = 0.014619 moles

b. To find the molar mass of the unknown acid, use the formula:

molar mass = mass of the sample (g) / moles of the acid
molar mass = 2.06 g / 0.014619 moles = 140.92 g/mol

So, the molar mass of the unknown monoprotic acid is approximately 140.92 g/mol.

To know more about Molar Mass:

https://brainly.com/question/29509963

#SPJ11