what is 19.8-17.1

The concentration of iodide ions in a saturated solution of lead (II) iodide is 3.03 x 10⁻³ M. The solubility product constant of PbI₂ is 1.4 x 10-8.

The solubility product constant, which is denoted by Ksp​ is defined as the equilibrium constant for a solid substance which  dissolves in an aqueous solution.

when PbI₂ dissolves, it dissociates as follows

PbI₂ --> Pb²⁺ + 2I⁻

Molar solubility is the number of moles of salt that can be dissolved in 1 L of solution

If molar solubility of PbI₂ is x , then molar solubility of Pb²⁺ is x and I⁻ is 2x

ksp is solubility product constant.

ksp = [Pb²⁺][I⁻]²

ksp = [x][2x]²

ksp = 4x³

4x³ = 1.4 x 10⁻⁸

x³ = 0.35 x 10⁻⁸

x = 1.51 x 10⁻³ M

since molar solubility of I⁻ is 2x ,

then molar solubility of I⁻ or concentration of iodide ions is 3.03 x 10⁻³ M

To know more about solubility product here

https://brainly.com/question/17081992

#SPJ1

First we need to find change in temperature.

\(\boxed{\sf \Delta T=T_f-T_I}\)

\(\\ \sf{:}\implies \Delta T=250-100\)

\(\\ \sf{:}\implies \Delta T=150°C\)

Now

\(\boxed{\sf Q=mc\Delta T}\)

\(\\ \sf{:}\implies Q=125(0.233)(150)\)

\(\\ \bf{:}\!\implies Q=4368.75J\)

The term molefraction is an important method which is used to calculate the concentration of a solution. It is mainly employed to calculate the concentration of a binary solution. Here the molefraction is 1 / 5. The correct option are D, D and B.

Molefraction of any component of a solution is defined as the ratio of the number of moles of that component to the total number of moles of the solution. The sum of molefraction of solute and solvent is one.

Here the molefraction of nitrogen = Moles of nitrogen / Total number of moles

1. 'x' of 'N' = 2 / 5 + 3 + 2 = 0.2 or 1 / 5

2. Molefraction of Argon = 0.60 / 0.40 + 0.04 + 0.60 = 0.57

Partial pressure = Molefraction × Total pressure

0.57 × 6.3 = 3.59 atm

3. 20 cm³ mixture contains:

20 × 1 mole / 22400 m³ = 8.9286 × 10⁻⁴

1 mole occupies 22400 cm³

8.9286 × 10⁻⁴ × 22400 cm³ / 1 mole = 20 cm³

Thus the correct option are D, D and B.

To know more about molefraction, visit;

https://brainly.com/question/13680920

#SPJ1

Ratio of moles of NH₃ produced to moles of N₂ used: 2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used: 2 moles of NH₃ / 3 moles of H₂

From the balanced chemical equation:

N₂ + 3 H₂ ⟶ 2 NH₃

We can determine the ratio of moles of products to the moles of each reactant.

Ratio of moles of NH₃ produced to moles of N₂ used:

From the balanced equation, we can see that 1 mole of N₂ reacts to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used:

From the balanced equation, we can see that 3 moles of H₂ react to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 3 moles of H₂

Learn more about the mole ratio at https://brainly.com/question/19099163

#SPJ1

Given the equation of reaction;

N₂ + 3 H₂ ---> 2 NH₃

Calculate the ratio of the moles of produced to the moles of each of the reactants used. (Write two separate ratios.)

Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off in the conversion of units.

The work of Maddy is flawed. We must multiply the value in grammes by 100 to convert it to centigrammes. Maddy gave the wrong answer of 7.5 cg by multiplying the weight in grammes by 10 rather than 100.

In order to convert 0.75 grammes to centigrammes, use the following formula:

100 cg/g x 0.75 g equals 75 cg

Consequently, 0.75 grammes is 75 centigrammes. Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off.

Learn more about conversion of units:

https://brainly.com/question/19420601

#SPJ1

The best way to measure the pH of a natural solution while out in a forest is to use a portable pH meter or pH test strips specifically designed for field use. These instruments provide accurate and reliable pH measurements and are convenient for outdoor applications.

1. Prepare the necessary equipment: Before heading out to the forest, gather the required tools. You will need a portable pH meter or pH test strips, as well as the necessary reagents or calibration solutions if using a pH meter.

2. Collect the sample: Locate the natural solution you want to measure the pH of, such as a stream, pond, or soil. Use a clean container to collect a representative sample of the solution.

3. Calibrate the pH meter (if applicable): If you are using a portable pH meter, it is essential to calibrate it before taking measurements. Follow the manufacturer's instructions to calibrate the meter using the provided calibration solutions.

4. Conduct the measurement: For pH meters, immerse the electrode into the collected sample. Allow some time for the reading to stabilize, and then record the pH value indicated on the meter's display.

5. Using pH test strips: If you are using pH test strips, dip the strip into the collected sample for the recommended amount of time. Remove the strip and compare the color change with the provided color chart. Determine the corresponding pH value from the chart.

6. Repeat for accuracy: To ensure reliability, repeat the measurement process at least once and compare the results. This step helps confirm the accuracy of your measurements.

7. Record and analyze the data: Note down the pH values obtained and any relevant observations. Analyze the data as needed for your research or monitoring purposes.

By following these steps and using the appropriate equipment, you can effectively measure the pH of a natural solution while in a forest setting.

For more such questions on measurements, click on:

https://brainly.com/question/28391278

#SPJ8

Answer:

Peptide Bonds

Explanation:

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Okay, let's solve this step-by-step:

* We are given that the initial volume of the gas is 1.75 L at 1 atm pressure

* We want to know the pressure if the volume increases to 16.60 L

* According to Boyle's Law: Pressure x Volume = Constant

* Since the initial pressure is 1 atm and volume is 1.75 L, the constant is:

1 atm x 1.75 L = 1.75 atm*L

* When the volume increases to 16.60 L, plugging into Boyle's Law:

P x 16.60 L = 1.75 atm*L

* Solving for P (pressure):

P = 1.75 atm*L / 16.60 L

P = 0.105 atm

Therefore, the pressure of the 1.75 L of disulfur monoxide gas if it occupied a volume of 16.60 L would be 0.105 atm.

The decompositionrate is second order on x, as shown by a positive (1/x) L—> R graph..

In Graph 1, two molecules of NO react for every molecule of O2 that reacts because O2 consumption is half that of NO consumption. H2(g)+2ICl(g)2HCl(g)+I2(g) is the overall reaction, and rate=k is the percentage law for step 2. [HI][ICl]rate=k[HI][ICl]. The following is the empirically discovered rate rule for ozone depletion: k [O3] = rate. A system must be in accordance with the rate law discovered through decomposition. As a result, in the zero-order reactions, the rate is free of the reactant concentration and the unit of rate and rate constant, which are mol/L/time, are equal.

Learn more about decomposition

https://brainly.com/question/19129412

#SPJ4

P=17.4 KPa is the pressure exerted on the wall.

A t = 1.00s

A = 8x10" m²,

N = 5x10^23 molecules

ΔV = 300 m/s

P=?

As, Momentum for I molecule is 2 MΔV

N molecules is 2N MΔV

Force exerted on the wall = Momentum/Δt

Also, So, Pressure exented on the wall

P= F /A = 2NMΔV/AΔt=2×5×10^23×4.65×10^-26×300/8×10^-4×1

P=17.4 KPa

What do pressure units mean?

The standard unit of pressure is a pascal (Pa). Given that a pascal is a very small unit of pressure, the kilopascal is the most appropriate measurement for commonplace gas pressures (kPa). 1000 pascals make up one kilopascal. The atmosphere is another frequently used measurement of pressure (atm).

Learn more about Pressure:

brainly.com/question/28012687

#SPJ4

Answer:

The bond that will be most polar amongst all these will be C-F.

Explanation:

Answer:

1.B

2.A

3. B

Explanation:

1. A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing

2. so 2 is electrons of one atom are transferred permanently to another atom.meaning the answer is A

3. is When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.

A chemical bond is an attraction between two atoms.

A ionic bond is A bond formed when atoms transfer electrons.

Answer:

True

Explanation:

They are actually the same

The answer is False.

The oxidation number is the number of electrons removed or added to an element or compound. This is also equal to the charge on the ion.

For example, if Sodium atom loses one electron, it becomes oxidized to the + 1 state.

Na → Na⁺ + e⁻.

So, the oxidation number of Sodium is the charge on the Sodium ion which is + 1.

So, the oxidation number is equal to the charge on the ion.

So, the answer is False.

Learn more about oxidation number here:

https://brainly.com/question/166558

Answer:

210 amps

Explanation:

B

Answer:

Refer to the attachment

Answer:

Zn + 2HCl -> H2 + ZnCl2

CS2 + 2O2 -> CO2 + S2O2

Explanation:

Answer: 1.3 L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

To calculate the volume for given molarity, we use the equation:

\(\text{Molarity of the solution}=\frac{\text{moles of solute}}{\text{Volume of solution in L}}\)

\(6.8M=\frac{8.6mol}{\text{Volume of solution in L}}\)

\(\text{Volume of solution in L}=1.3\)

Thus the volume in Liters is 1.3

50 g of As\(_2\)O\(_3\) are titrated with 38.5 mL of KMnO\(_4\) to reach the end point. 0.26M is the concentration of the KMnO\(_4\)  solution.

Concentration in chemistry refers to the quantity of a material in a certain area. The ratio of the solute within a solution to the solvent or whole solution is another way to define concentration. In order to express concentration, mass in unit volume is typically used.

The solute concentration can, however, alternatively be stated in moles or volumetric units. Concentration may be expressed as per unit mass rather than volume.

5As\(_2\)O\(_3\)(s)+4MnO\(_4\)⁻(aq)+9H\(_2\)O(l)+12H⁺(aq)⟶10H\(_3\)AsO\(_4\)(aq)+4Mn\(_2\)⁺(aq)

the stoichiometry ratio between As\(_2\)O\(_3\) and MnO\(_4\)⁻ is 5:4

0.0126 moles of  As\(_2\)O\(_3\) will react with 4/5×0.0126 moles = 0.01008moles

0.01008moles of MnO\(_4\)⁻ is present in 38mL

concentration of KMnO\(_4\)= moles×volume

                                        = 0.010/38×1000

                                        =0.26M

To know more about Concentration, here:

https://brainly.com/question/10725862

#SPJ1

Answer:

Explanation:

A graduated cylinder was filled to 30.0 mL with a liquid. An unknown metal cylinder having a mass of 60.27 g was submerged in the in the liquid. The final volume of the liquid level was 45.2 mL.

a. Calculate the density of the unknown metal cylinder.

b. The density of the liquid is 0.899 g/mL. What is the mass of the liquid in the graduated cylinder?

A heater is placed under one corner of a water bed mattress. Warm water moves throughout the mattress because of convection. The correct option is B.

Heat is transferred through convection, which is the large-scale movement of molecules inside gases and liquids.

Conduction is used to move heat from the object to the fluid initially, but fluid motion is responsible for the bulk of the heat transfer.

When heat is transferred from your body by moving air, convection takes place. The air will rise if it absorbs your heat and is cooler than the environment.

Cooler air moves in to take its place and absorb more of your warmth as the warmed air rising around you increases. You feel cooler as this air moves more quickly.

Thus, the correct option is B.

For more details regarding heat transfer, visit:

https://brainly.com/question/13433948

#SPJ2

Answer:  the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.An ideal gas is a gas that conforms, in physical behaviour, to a particular, idealized relation between pressure, volume, and temperature called the ideal gas law

Answer:

12.2 g

Explanation:

Step 1: Write the balanced equation for the synthesis of SO₃ from S

S + 1.5 O₂ ⇒ SO₃

Step 2: Calculate the moles corresponding to 4.91 g of S

The molar mass of S is 32.07 g/mol.

4.91 g × 1 mol/32.07 g = 0.153 mol

Step 3: Calculate the theoretical yield, in moles, of SO₃ from 0.153 moles of S

The molar ratio of S to SO₃ is 1:1. The moles of SO₃ produced are 1/1 × 0.153 mol = 0.153 mol.

Step 4: Calculate the mass corresponding to 0.153 moles of SO₃

The molar mass of SO₃ is 80.06 g/mol.

0.153 mol × 80.06 g/mol = 12.2 g

Answer: During aerobic respiration, catabolic reactions convert larger complex organic molecules into ATP, the chemical that drives most physiological processes in the body.

Explanation:

The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

To know more about combustion, visit;

https://brainly.com/question/14335621

#SPJ1

Answer: 2.4e+24

Explanation:

It could just as easily have been selected to be 1/24th of the mass of one atom of a carbon atom, or 1/10th the mass of a calcium atom, A sample of 250 grams is equivalent to 1.58 moles of potassium permanganate.

The periodic table of elements has vertical groups that tell you the number of electrons and horizontal periods that tell you the number of valance shells. The chemical elements are arranged in the periodic table according to their atomic numbers, starting with hydrogen, which has the lowest atomic number, and moving up to uranium, which has the greatest atomic number.

Due to their comparable chemical behavior, the periodic table's vertical columns are referred to as groups or families. The number of valence electrons and chemical characteristics is the same for all members of a family of elements. Periods refer to the horizontal rows on the periodic table.

The contemporary periodic table has 18 vertical columns and 7 horizontal periods.

To know more about periodic table, visit;

https://brainly.com/question/29766008

#SPJ1

Answer:

0.9718M

Explanation:

Rate constant, k =  0.255 M-1s-1

time, t = 8.00 s

Initial concentration, [A]o = 1.33 M

Final concentration, [A] = ?

These quantities are represented by the equation;

1 / [A] = 1 / [A]o + kt

1 / [A] = 1 /1.33 + (0.255 * 8)

1 / [A] = 0.7519 + 2.04

[A] = 1 / 2.7919 = 0.3582 M

How much of NO2 decomposed is obtained from the change in concentration;

Change in concentration = Initial - Final

Change = 1.33 - 0.3582 = 0.9718M

Answer:b

b

Explanation: