Rubidium and bromine atoms are depicted at right. Answer the following questions. (a) What is the charge on the rubidium ion? What is the charge on the bromide ion? (b) To which noble gas is the rubidium ion related? To which noble gas is the bromide ion related? (c) Which pair below best represents the relative ionic sizes? 1.A 2.B 3.C 4.D

Answer:

The balanced chemical equation for the single replacement reaction between copper (Cu) and sulfuric acid (H₂SO4) is:

Cu + H₂SO4 → CuSO4 + H2

Explanation:

In this reaction, copper reacts with sulfuric acid to form copper(II) sulfate and hydrogen gas. The copper replaces the hydrogen in the sulfuric acid compound, resulting in the formation of copper(II) sulfate and hydrogen gas. The equation is balanced because there are equal numbers of atoms of each element on both sides of the arrow.

When the reaction occurs, the net result is that the energy is released because the total potential energy of the products is greater than the total potential energy of the reactants.

Potential energy is any form of energy that is stored and can be released as work or heat. Chemical energy is stored in a substance that can undergo a chemical reaction that releases energy.

Chemical potential energy is the energy stored in the chemical bonds of a substance.

If the potential energy of reactants is greater than, excess energy is released after the formation of products in the reaction and such reactions are called as exothermic reactions.

Learn more about Potential Energy, here:

https://brainly.com/question/31100203

#SPJ1

The major product of the monobromination of nitrobenzene is 3-bromonitrobenzene (also known as meta-bromonitrobenzene).

Monobromination of nitrobenzene refers to the reaction of nitrobenzene with bromine, in which one hydrogen atom of the benzene ring is replaced by a bromine atom.

Nitrobenzene is an aromatic compound with a nitro group (-[tex]NO_{2}[/tex]) attached to the benzene ring.

The nitro group is a meta-directing group, which means that it directs the incoming bromine atom to attach at the meta position (the 3rd carbon) relative to the nitro group.
In the monobromination of nitrobenzene, the major product formed is 3-bromonitrobenzene due to the meta-directing influence of the nitro group.

For more information on monobromination kindly visit to

https://brainly.com/question/31642805

#SPJ11

Volatile organic compounds (VOCs) in the atmosphere are mainly emitted by anthropogenic sources such as industrial processes, transportation, and the use of solvents and consumer products.

They can also be emitted by natural sources such as vegetation and wildfires. The types and amounts of VOCs emitted depend on the source and can vary widely. Some common examples of VOCs include benzene, toluene, formaldehyde, and acetaldehyde. VOCs are of concern because they can react with other chemicals in the atmosphere to form ground-level ozone, a major component of smog.

Ozone can be harmful to human health and can also damage crops and other vegetation. Additionally, some VOCs are considered toxic and can have long-term health effects. Therefore, efforts are made to reduce emissions of VOCs through regulation and the development of cleaner technologies.

Learn more about Volatile organic compounds here:

https://brainly.com/question/1163824

#SPJ11

a- the mass of oxygen and the mass of hydrogen used is 0.4 g

b- Igniting the mixture, 6.4 g mass of water would result

   from the reaction

c- Volume of water that would be produced is 7.97  L.

a. To calculate the mass of oxygen and hydrogen, we need to use the ideal gas law and the molar mass of each gas. The molar mass of oxygen (O2) is approximately 32 g/mol, and the molar mass of hydrogen (H2) is approximately 2 g/mol.

For oxygen:

Mass of oxygen = Volume of oxygen (L) × Molar mass of oxygen (g/mol)

Convert cm³ to L:

Volume of oxygen = 100 cm³ / 1000 = 0.1 L

Mass of oxygen = 0.1 L × 32 g/mol = 3.2 g

For hydrogen:

Mass of hydrogen = Volume of hydrogen (L) × Molar mass of hydrogen (g/mol)

Convert cm³ to L:

Volume of hydrogen = 200 cm³ / 1000 = 0.2 L

Mass of hydrogen = 0.2 L × 2 g/mol = 0.4 g

b. The balanced chemical equation for the reaction between oxygen and hydrogen to form water is:

2 H2 + O2 → 2 H2O

From the equation, we can see that the molar ratio of oxygen to water is 1:2. Therefore, the mass of water produced would be twice the mass of oxygen used, which is:

Mass of water = 2 × 3.2 g = 6.4 g

c. To calculate the volume of water produced, we need to use the ideal gas law again. The molar volume of any gas at STP (standard temperature and pressure) is 22.4 L/mol.

Moles of water = Mass of water (g) / Molar mass of water (g/mol)

Moles of water = 6.4 g / 18 g/mol = 0.3556 mol

Volume of water = Moles of water × Molar volume of gas at STP

Volume of water = 0.3556 mol × 22.4 L/mol = 7.97 L

Therefore, the volume of water produced would be approximately 7.97 L.

for more questions on oxygen
https://brainly.com/question/28009615
#SPJ11

To obtain a good yield of carboxylic acid when ethanol is oxidized using potassium dichromate (VI) (K₂Cr₂O₇) as an oxidizing agent, specific conditions must be met. The correct combination of these conditions is option (b) I, II, and III.

First, sulfuric acid (H₂SO₄) is added to the reaction mixture to act as a catalyst and provide the necessary acidic medium for the oxidation reaction to occur. This step is crucial as it enables the conversion of ethanol to a carboxylic acid with the help of potassium dichromate.

Second, heating the reaction mixture under reflux is essential to maintain a constant temperature and prevent the loss of volatile compounds. This process ensures that the reaction occurs at a steady pace, maximizing the yield of the carboxylic acid.

Lastly, distilling the product as the oxidizing agent is added allows for the continuous separation and collection of the carboxylic acid. This method prevents the carboxylic acid from undergoing further oxidation or side reactions, preserving the desired product and increasing the overall yield.

By following these three steps, you can successfully obtain a high yield of carboxylic acid when oxidizing ethanol using potassium dichromate (VI).

Learn more about oxidation  here:

https://brainly.com/question/16976470

#SPJ11

Approximately 29 mL of 0.420 M HNO3(aq) is required to reach the equivalence point in this titration.

To determine the volume of 0.420 M HNO3(aq) required to reach the equivalence point in the titration of a 40.0 ml sample of 0.150 M Ba(OH)2(aq), we need to consider the stoichiometry of the reaction between Ba(OH)2 and HNO3.

The balanced equation for the reaction is:

Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O

From the balanced equation, we can see that one mole of Ba(OH)2 reacts with two moles of HNO3. Therefore, the moles of HNO3 required can be calculated using the equation:

moles of HNO3 = (moles of Ba(OH)2) x 2

The moles of Ba(OH)2 can be calculated using the formula:

moles of Ba(OH)2 = (concentration of Ba(OH)2) x (volume of Ba(OH)2)

Plugging in the values given:

moles of Ba(OH)2 = (0.150 mol/L) x (0.040 L) = 0.006 mol

Now we can calculate the moles of HNO3 required:

moles of HNO3 = (0.006 mol) x 2 = 0.012 mol

To calculate the volume of HNO3(aq) required, we can use the formula:

volume of HNO3 = (moles of HNO3) / (concentration of HNO3)

Plugging in the values given:

volume of HNO3 = (0.012 mol) / (0.420 mol/L) ≈ 0.029 L

Converting the volume to milliliters:

volume of HNO3 ≈ 0.029 L x 1000 mL/L ≈ 29 mL

Therefore, approximately 29 mL of 0.420 M HNO3(aq) is required to reach the equivalence point in this titration.

Know more about Titration here:

https://brainly.com/question/31870069

#SPJ11

The new volume of the products is 45.0 L.

The ideal gas law can be used to relate the initial and final volumes of the gas sample, assuming that the temperature and pressure are held constant:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At the start of the reaction, the sample contains 2 moles of gas A and no moles of gas B. Therefore, the initial number of moles in the system is:

n_initial = n_A = 2

The initial volume of the sample is given as 30.0 L.

At the end of the reaction, 2 moles of gas A have been converted to 3 moles of gas B. Therefore, the final number of moles in the system is:

n_final = n_A + n_B = 0 + 3 = 3

We can now use the ideal gas law to find the final volume of the system:

P_initial V_initial = n_initial RT

P_final V_final = n_final RT

Dividing the second equation by the first equation, and noting that the temperature and pressure are held constant, we obtain:

V_final / V_initial = n_final / n_initial

Substituting in the values for n_final and n_initial, we get:

V_final / 30.0 L = 3 / 2

Solving for V_final, we get:

V_final = (3 / 2) x 30.0 L = 45.0 L

The final volume of the system can be found using the ideal gas law and the fact that the temperature and pressure are held constant. The initial and final number of moles of gas in the system are used to relate the initial and final volumes of the gas sample.

To know more about volume, visit

https://brainly.com/question/29796637

#SPJ11

This statement is true. Density is a measure of how much mass is contained in a given volume of a substance. The units of density can be expressed in grams per milliliter (g/mL) or kilograms per liter (kg/L).

Since 1 kg is equal to 1000 g and 1 L is equal to 1000 mL, we can convert between the two units using the following conversions:

1 kg = 1000 g

1 L = 1000 mL

Therefore, we can convert between g/mL and kg/L using the following relationship:

1 g/mL = 1 kg/L

So, if a substance has a density of 13.6 g/mL, it is equivalent to a density of 1.36 kg/L, since both expressions represent the same amount of mass per unit volume of the substance.

Hence, the given statement is true.

Learn more about Density at

brainly.com/question/29775886

#SPJ1

The electric potential energy of an electron in the n=4 state of a hydrogen atom is -2.18 x 10^-J

The electric potential energy of an electron in a hydrogen atom can be calculated using the formula E = -k(Q1Q2)/r, where k is Coulomb's constant, Q1 is the charge of the electron, Q2 is the charge of the proton, and r is the distance between the electron and proton. For an electron in the n=4 state, the distance can be calculated using the formula for the radius of an electron orbit in hydrogen:

r = n^2(h^2)/(4π^2meke^2)

where h is Planck's constant, me is the mass of the electron, and e is the elementary charge.

Substituting the values given, we get:

r = 4^2(6.626 x 10^-34 Js)^2/(4π^2 x 9.109 x 10^-31 kg x 8.988 x 10^9 Nm^2/C^2 x (1.6 x 10^-19 C)^2)

= 5.292 x 10^-11 m

Now, we can use this value to calculate the electric potential energy of the electron:

E = -k(Q1Q2)/r

= -(9 x 10^9 Nm^2/C^2)(-1.6 x 10^-19 C)(1.6 x 10^-19 C)/(5.292 x 10^-11 m)

= -2.18 x 10^-18 J

Therefore, the electric potential energy of an electron in the n=4 state of a hydrogen atom is -2.18 x 10^-18 J.

To know more about electric potential energy visit:

brainly.com/question/28444459

#SPJ11

The compound that does NOT have hydrogen bonding in its structure is HF.

Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom such as nitrogen, oxygen, or fluorine. In each of the compounds listed, we need to identify if there is a hydrogen atom bonded to one of these electronegative atoms.

The compound that does NOT have hydrogen bonding is HF.

To learn more about hydrogen bonds, visit

https://brainly.com/question/1926005

#SPJ11

The number of ions per moles of each ion in the solution is 0.45 mol.

Nickel is a transition metal that has a variable valence, meaning that it can undergo oxidation and reduction reactions. In its +2 oxidation state, nickel has two valence electrons available for chemical bonding, which makes it a good reducing agent.

To determine the ions in the solution of a nickel salt, we need to know the chemical formula of the salt and the state of nickel in the salt. In this case, we don't have enough information to answer the question. We also need to know the charge of the ions in the solution.

If we assume that the nickel salt is [tex]Ni(NO_3)_2[/tex], which is the nickel nitrate hexahydrate, we can use the following information to calculate the charge of the ions:

• Nickel(II) ion,  [tex]Ni(NO_3)_2[/tex]+, has a charge of +2.

• Nitrate ion,  [tex]Ni(NO_3)_2[/tex]-, has a charge of -1.

Therefore, the nickel salt has a charge of +6, which means it contains two  [tex]Ni(NO_3)_2[/tex]+ ions and four  [tex]Ni(NO_3)_2[/tex]- ions.

We also need to know the concentration of the solution to determine the number of moles of each ion present in the solution.

The mass of 39.2 g of nickel can be calculated by using the molar mass of nickel, which is approximately 58.933 g/mol.

Therefore, the number of moles of nickel in the solution is:

Mass of nickel = 39.2 g

Molar mass of nickel = 58.933 g/mol

Moles of nickel = Mass of nickel / Molar mass of nickel

Moles of nickel = 39.2 g / 58.933 g/mol

Moles of nickel = 0.65 mol

We also need to know the number of moles of each ion in the solution to calculate the number of moles of each ion present in the solution.

• The formula for nickel nitrate hexahydrate is  [tex]Ni(NO_3)_2[/tex]

• To calculate the molar mass of nickel nitrate hexahydrate, we need to sum the molar masses of nickel and nitrate ions.

• Molar mass of  [tex]Ni(NO_3)_2[/tex] = 58.933 g/mol + 141.03 g/mol

• Molar mass of  [tex]Ni(NO_3)_2[/tex] = 200.00 g/mol

• The formula for  [tex]Ni(NO_3)_2[/tex] is 141.03 g/mol

Therefore, the number of moles of  [tex]Ni(NO_3)_2[/tex] in the solution is:

• Moles of NO3- = 0.65 mol / 141.03 g/mol

• Moles of NO3- = 0.45 mol

Learn more about ions visit: brainly.com/question/13692734

#SPJ4

The element with the configuration [Xe]6s24f4 is Gadolinium (Gd).


In the given electron configuration, "[Xe]" represents the electron configuration of the noble gas xenon (54 electrons). The following part, "6s24f4," indicates the distribution of the remaining electrons in the outer shells. The "6s2" portion indicates that there are two electrons in the 6s orbital, and the "4f4" indicates that there are four electrons in the 4f orbital.
Gadolinium is a chemical element with the atomic number 64 and the symbol Gd. It belongs to the lanthanide series of elements and is part of the f-block in the periodic table. Gadolinium is a silvery-white metal that exhibits magnetic properties and has various applications, including its use in medical imaging, nuclear reactors, and electronic devices.

Learn more about Gadolinium here:

https://brainly.com/question/30886793

#SPJ11

The molarity of the solution is 0.333 M. First, let's define what molarity is. Molarity (M) is a unit of concentration that measures the number of moles of solute (in this case, calcium hydroxide) per liter of solution.

To find the molarity of a solution, we need to follow these steps:
1. Calculate the number of moles of calcium hydroxide in 18.5 g. To do this, we need to use the formula:

moles = mass / molar mass

The molar mass of calcium hydroxide is 74.093 g/mol. Therefore,

moles = 18.5 g / 74.093 g/mol = 0.2494 mol

2. Convert the volume of water from milliliters (ml) to liters (L).

750.0 ml = 0.75 L

3. Calculate the molarity of the solution using the formula:

Molarity = moles of solute / liters of solution

Molarity = 0.2494 mol / 0.75 L = 0.332 M

Therefore, the molarity of the solution made by dissolving 18.5 g of calcium hydroxide in 750.0 ml of water is 0.332 M.

I hope this helps! Let me know if you have any further questions.
To calculate the molarity of a solution, you need to know the moles of solute and the volume of the solvent in liters. Here's a concise explanation using the given information:

1. Calculate the moles of calcium hydroxide (Ca(OH)₂):
Ca(OH)₂ has a molar mass of 40.08 g/mol (Ca) + 2(16.00 g/mol (O) + 1.01 g/mol (H)) = 74.09 g/mol.
18.5 g of Ca(OH)₂ ÷ 74.09 g/mol = 0.25 moles.

2. Convert the volume of water to liters:
750.0 mL = 0.750 L.

3. Calculate the molarity:
Molarity = moles of solute ÷ liters of solvent = 0.25 moles ÷ 0.750 L = 0.333 M.

To know kore about molarity visit:-

https://brainly.com/question/8732513

#SPJ11

The acid ionization reaction for H₂SO is  HSO (aq) → 2H⁺ (aq) + SO²⁻(aq). H₂SO is a dibasic acid.

Any process in physics and chemistry whereby electrically neutral atoms or molecules are changed into electrically charged atoms or molecules (ions) by receiving or losing electrons is known as ionisation. Radiation, including charged particles and X-rays, transmits its energy to matter mostly by ionisation.

Ionisation frequently takes place in a liquid solution in chemistry. For instance, neutral hydrogen chloride gas (HCl) molecules combine with polar water molecules (H₂O) to form positive hydronium ions (H₃O⁺) and negative chloride ions (Cl⁻). Zinc atoms, Zn, lose their electrons to hydrogen ions at the surface of a piece of metallic zinc exposed to an acidic solution, turning them into colourless zinc ions, Zn₂⁺.

When an electric current is sent through gases at low pressures, ionisation by collision happens. If the electrons that make up the current have enough energy (the ionisation energy varies depending on the material), they can drive other electrons out of the neutral gas molecules, creating ion pairs that are made up of a detached negative electron and the consequent positive ion. As some of the electrons bond with neutral gas molecules, negative ions are also created. At very high temperatures, intermolecular collisions can also ionise gases.

Learn more about Ionization reaction:

https://brainly.com/question/29614811

#SPJ4

The best colored indicator to use in the titration of 0.1 M CH3CO2H(aq) with NaOH(aq) would be phenolphthalein. This is because the pH range for the equivalence point of this titration falls within the range where phenolphthalein changes color, which is approximately pH 8.2 to 10.0.

Phenolphthalein is a commonly used indicator for acid-base titrations as it changes color in a very distinct manner. It is colorless in acidic solutions and pink in basic solutions. This makes it easy to identify when the equivalence point has been reached in the titration.
The Ka value for CH3CO2H is 1.8 x 10^-5. This indicates that CH3CO2H is a weak acid and will not completely dissociate in water. During the titration, NaOH(aq) will be added to the CH3CO2H(aq) until the equivalence point is reached. At this point, the amount of NaOH added will be equal to the amount of CH3CO2H in the solution, resulting in the formation of CH3CO2Na(aq) and water. The pH at the equivalence point will be approximately 8.2-10.0, which is the range where phenolphthalein changes color.
In conclusion, phenolphthalein would be the best colored indicator to use in the titration of 0.1 M CH3CO2H(aq) with NaOH(aq) due to its pH range for the equivalence point falling within the range where phenolphthalein changes color.

learn more about indicator

https://brainly.com/question/13785316

#SPJ11

The [OH-] concentration in the sample of the Great Salt Lake with a pH of 8.25 is approximately 1.78 × 10^(-6) M.

To calculate the [OH-] concentration in a sample of the Great Salt Lake, we can use the relationship between pH and pOH.

The pH of a solution is defined as the negative logarithm (base 10) of the hydrogen ion concentration ([H+]), and the pOH is defined as the negative logarithm (base 10) of the hydroxide ion concentration ([OH-]). The sum of the pH and pOH is always equal to 14.

Given that the pH is 8.25, we can find the pOH by subtracting the pH from 14:

pOH = 14 - 8.25 = 5.75

Since the pH and pOH together must add up to 14, we can use this relationship to calculate the [OH-] concentration:

[OH-] = 10^(-pOH) = 10^(-5.75)

Using a calculator, we find that [OH-] ≈ 1.78 × 10^(-6) M.

Therefore, the [OH-] concentration in the sample of the Great Salt Lake with a pH of 8.25 is approximately 1.78 × 10^(-6) M.

Know more about pH here:

https://brainly.com/question/2288405

#SPJ11

The pH of the buffer solution is approximately 0.395.

To solve the overall question, we need to calculate the pH of the buffer solution given that it is 0.470 M in a weak acid with a Ka of 1.8×10^−6 and 0.210 M in its conjugate base.

First, we need to find the pKa value by taking the negative logarithm of the acid dissociation constant (Ka):

pKa = -log10(1.8×10^−6)

Next, we can use the Henderson-Hasselbalch equation to calculate the pH:

pH = pKa + log10([conjugate base]/[weak acid])

pH = pKa + log10(0.210/0.470)

Substituting the value of pKa and evaluating the logarithm:

pH = -log10(1.8×10^−6) + log10(0.447)

We can simplify this expression by subtracting the logarithms:

pH = log10(0.447/1.8×10^−6)

Now, let's evaluate the division inside the logarithm:

pH = log10(248.33×10^6)

Finally, calculating the logarithm:

pH ≈ log10(2.4833) ≈ 0.395

Therefore, the pH of the buffer solution is approximately 0.395.

Know more about Buffer solution here:

https://brainly.com/question/31428923

#SPJ11

The pH of a 0.10 M solution of sodium nicotinate at 25 °C is approximately 10.17

Sodium nicotinate is a salt of a weak acid (nicotinic acid) and a strong base (sodium hydroxide). Therefore, we need to use the equation for the hydrolysis of salts to calculate the pH of a 0.10 M solution of sodium nicotinate.

The hydrolysis equation for sodium nicotinate is:

C6H4NO2Na + H2O ⇌ C6H4NO2H + NaOH

The equilibrium constant expression for this reaction is:

Kw/Kb = [C6H4NO2H][NaOH]

where Kw is the ion product constant of water (1.0 × 10^-14) and Kb is the base dissociation constant of nicotinic acid.

From the given data, we can find that the Kb value of nicotinic acid is 1.4 × 10^-5.

Now, we can write the equilibrium constant expression as:

Kw/Kb = [C6H4NO2H][NaOH]

1.0 × 10^-14/1.4 × 10^-5 = [C6H4NO2H][0.10 M]

Solving for [C6H4NO2H], we get:

[C6H4NO2H] = 7.14 × 10^-10 M

Therefore, the pH of the solution can be calculated using the expression for the ionization of water:

pH = 1/2(pKa - log[C6H4NO2H])

where pKa is the dissociation constant of nicotinic acid (3.48).

Substituting the values, we get:

pH = 1/2(3.48 - log[7.14 × 10^-10]) ≈ 10.17

Therefore, the pH of a 0.10 M solution of sodium nicotinate at 25 °C is approximately 10.17.

Learn more about sodium nicotinate here:

https://brainly.com/question/17602294

#SPJ11

Scammers often attempt to obtain personal information such as social security numbers, bank account details, or passwords, under the guise of legitimate organizations. scammers often make enticing promises that are unrealistic or too good to be true. These promises may include guaranteed high returns on investments, lottery winnings, or extravagant rewards for minimal effort.

The two major signs of a scam are a request for personal information and promises that seem too good to be true. Scammers often attempt to obtain personal information such as social security numbers, bank account details, or passwords, under the guise of legitimate organizations. They may use tactics like phishing emails, fake websites, or phone calls to deceive individuals into revealing sensitive information. It's important to remember that reputable organizations typically do not ask for personal information via unsolicited communication. Additionally, scammers often make enticing promises that are unrealistic or too good to be true. These promises may include guaranteed high returns on investments, lottery winnings, or extravagant rewards for minimal effort. Such offers are designed to lure unsuspecting individuals into providing money or personal information. Being cautious and skeptical, avoiding sharing personal information without verifying the legitimacy of the request, and conducting thorough research can help protect against falling victim to scams.

For more question on organizations

https://brainly.com/question/21011563

#SPJ11

In the reaction 2Cs(s) + Cl₂(g) → 2CsCl(s), Cl₂ is the oxidizing agent (Option B).

In the reaction, chlorine (Cl₂) is being reduced (gaining electrons) as it reacts with the sulfur (S) in the solid compound (CS), resulting in the formation of the ionic compound, CsCl.

Therefore, chlorine is the oxidizing agent, meaning it is causing the oxidation (loss of electrons) of the sulfur.

Learn more about oxidizing agent: https://brainly.com/question/10547418

#SPJ11

The environmental hazard that is a product of the natural decay of radioactive substances found in the ground is called Radon gas.

Radon gas is a colorless, odorless, and tasteless gas that is formed when uranium in the soil and rocks breaks down. It can seep into buildings and homes through cracks in the foundation, walls, and floors, and accumulate to dangerous levels. Radon exposure is the leading cause of lung cancer among non-smokers and is a significant health concern in many areas around the world.

While the number of neutrons varies, the number of protons in the atomic nuclei of the component atoms of a specific chemical remains constant. The radioactive components of an element are known as radioisotopes. They can also be referred to as atoms having an excessive amount of electrical energy in their nucleus or unstable neutron-proton pairs. Actual radiation levels are reported using either the Cobalt (Ci), the official machine in the United States, or the Contributes to the Continuing (Bq), the international unit. Life in its entirety split in half.

Learn more about radioisotopes here

https://brainly.com/question/29661984

#SPJ11

The 149.2 grams of potassium chloride would be produced if 78 grams of potassium and 71 grams of chlorine completely reacted.

The balanced chemical equation for the reaction between potassium metal (K) and chlorine gas (Cl₂) to form solid potassium chloride (KCl) is:

2K(s) + Cl₂(g) → 2KCl(s)

This equation indicates that two atoms of potassium react with one molecule of chlorine gas to yield two molecules of potassium chloride.

The type of reaction is a combination reaction, also known as a synthesis reaction. In this type of reaction, two or more substances combine to form a single product.

To determine the mass of potassium chloride produced, we need to calculate the limiting reactant. The molar mass of potassium is approximately 39.1 g/mol, and the molar mass of chlorine is approximately 35.5 g/mol.

First, we convert the given masses of potassium (78 g) and chlorine (71 g) into moles by dividing them by their respective molar masses:

Moles of potassium = 78 g / 39.1 g/mol = 2 mol

Moles of chlorine = 71 g / 35.5 g/mol ≈ 2 mol

Since the reactants have a 1:1 stoichiometric ratio, it can be seen that both potassium and chlorine are present in the same amount. Therefore, the limiting reactant is either potassium or chlorine.

Assuming potassium is the limiting reactant, we can calculate the mass of potassium chloride produced. Since 2 moles of potassium react to form 2 moles of potassium chloride, we can use the molar mass of potassium chloride (74.6 g/mol) to calculate the mass:

Mass of potassium chloride = 2 mol × 74.6 g/mol = 149.2 g

For more such questions on potassium chloride

https://brainly.com/question/24879357

#SPJ11

Explanation:

pH is defined as the negative logarithm of the hydrogen ion or hydroxonium ion concentration of a solution. That is;

[tex] \bold{pH = -log([{H_3O}^{+}])} [/tex]

From the question

[tex] [{H_3O}^{+}][/tex] = 2.5 × 10-⁷ M

[tex]pH = - log(2.5 \times {10}^{ - 7} ) \\ = 6.602[/tex]

From the results the solution can be classified as acidic since it's pH is below 7 that's the neutral region

The correct option is D, The equivalence point occurs at a pH greater than 7 for a titration of a weak acid with a strong base. This is because the strong base will react with the weak acid to form a salt and water.

Titration is a commonly used analytical technique in chemistry for determining the concentration of an unknown solution by adding a known amount of a standardized solution of known concentration. The process involves slowly adding the standardized solution to the unknown solution until the chemical reaction between the two is complete. The point at which the reaction is complete is known as the equivalence point and can be detected using various indicators that change color or other properties at this point.

The main aim of titration is to accurately measure the concentration of a particular substance in a solution. For example, an acid-base titration can be used to determine the concentration of an acid in a solution by adding a known amount of a strong base until the equivalence point is reached. Similarly, a redox titration can be used to determine the concentration of a reducing or oxidizing agent in a solution.

To know more about Titration refer to-

brainly.com/question/31483031

#SPJ4

The partial pressure of argon is 1.25 atm.

This issue can be resolved using Dalton's law of partial pressures.

Finding the mole fractions of He and Ar in the mixture is the first step.

moles of He = 12.0 g / 4.00 g/mol = 3.00 mol

moles of Ar = 40.0 g / 39.95 g/mol = 1.00 mol

total moles = 3.00 mol + 1.00 mol = 4.00 mol

mole fraction of He = 3.00 mol / 4.00 mol = 0.75

mole fraction of Ar = 1.00 mol / 4.00 mol = 0.25

The partial pressures can then be determined using the mole fractions:

He's partial pressure is equal to He's mole fraction x total pressure

= 0.75 × 5.00 atm

= 3.75 atm

partial pressure of Ar = mole fraction of Ar × total pressure

= 0.25 × 5.00 atm

= 1.25 atm

Therefore, the partial pressure of argon is 1.25 atm.

Learn more about Dalton's law here : brainly.com/question/19975849

#SPJ1

False. OBD-II systems typically have more than one O2S (oxygen sensor) in the exhaust system.

The statement is false because OBD-II (On-Board Diagnostics, second generation) systems usually feature at least two oxygen sensors in the exhaust system. One oxygen sensor, known as the upstream or pre-catalytic converter sensor, is located before the catalytic converter. This sensor measures the amount of oxygen in the exhaust gases before they are treated by the catalytic converter and helps the engine control module (ECM) adjust the air-fuel mixture for optimal combustion.

The second sensor called the downstream or post-catalytic converter sensor, is positioned after the catalytic converter. This sensor monitors the efficiency of the catalytic converter in reducing harmful emissions. In some vehicles, there can be even more oxygen sensors to monitor individual cylinders or multiple catalytic converters.

To know more about OBD-II visit:

https://brainly.com/question/28068107

#SPJ11

The correct option is C, The pH of the 0.15 M aqueous solution of sodium formate is 8.46.

The chemical equation for the reaction between formic acid and sodium formate is:

HCOOH + NaHCOO ⟷ HCOO⁻ + Na⁺ + H₂O

Ka = [H⁺][HCOO⁻] / [HCOOH]

[H⁺] = Ka x [HCOOH] / [HCOO⁻]

[H⁺] = (1.8 x [tex]10^{-4[/tex]) x (0.15) / 1

[H⁺] = 2.7 x [tex]10^{-5[/tex] M

pH = 14 - pOH

pH = 14 - (-log[OH⁻])

pH = 14 - (-log Kw / [OH⁻])

pH = 14 - (-log Kw - log [OH⁻])

pH = 14 - (14 + pKw - pOH)

pH = pKw - pOH

pH = 14 - 1/2(pKa - log [NaHCOO])

where pKw = 14, and pKa = -log Ka = -log (1.8 x [tex]10^{-4[/tex]) = 3.74.

Substituting the values into the equation gives:

pH = 14 - 1/2(3.74 - log 0.15)

pH = 8.46

pH is a measure of the acidity or basicity of a solution. The pH scale ranges from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most basic (also called alkaline). The pH of a solution is determined by the concentration of hydrogen ions (H+) in the solution. The more hydrogen ions there are, the lower the pH and the more acidic the solution is. Conversely, the fewer hydrogen ions there are, the higher the pH and the more basic the solution is.

The pH of a solution can be measured using a pH meter or by using pH paper, which changes color depending on the pH of the solution. It is important to control the pH of certain chemical reactions and processes, as it can affect the rate of reaction and the properties of the resulting product.

To know more about pH refer to-

brainly.com/question/2288405

#SPJ4