Look at sample problem 19.10 in the 8th ed Silberberg book. Write the Ksp expression. Find the concentrations of the ions you need (in this case Ca2 and F-). Put those concentrations into the Ksp expression to calculate Q. Compare Q to K A common laboratory method for preparing a precipitate is to mix solutions containing the component ions. Does a precipitate form when 10. ml of 0.0010 M Ca(NO3)2 is mixed with 10. ml of 0.00010 M NaF

The mass of copper deposited is approximately \(1.32 * 10^{(-3) }g\), and the mass of silver deposited is approximately \(2.23 * 10^{(-3)} g\).

To calculate the masses of copper and silver deposited, we need to use the concept of Faraday's law of electrolysis, which states that the amount of substance deposited during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.

First, we need to calculate the total charge (Q) passed through the circuit using the equation:

Q = I * t

where I is the current (0.4 A) and t is the time (5 hours). Therefore,

Q = 0.4 A * 5 hours = 2 C (Coulombs)

Next, we need to determine the amount of substance deposited using the equation:

n = Q / F

where n is the number of moles of the substance and F is the Faraday constant. The Faraday constant represents the charge of one mole of electrons and is approximately 96,485 C/mol.

For copper (Cu), the molar mass is approximately 63.55 g/mol, and for silver (Ag), the molar mass is approximately 107.87 g/mol.

Using the molar mass and the number of moles, we can calculate the mass of the substance deposited using the equation:

Mass = n * molar mass

Let's calculate the masses of copper and silver deposited:

For copper (Cu):

n(Cu) = Q / F = 2 C / 96485 C/mol ≈ \(2.07 * 10^{(-5)\) mol

Mass(Cu) = n(Cu) * molar mass(Cu) = \(2.07 * 10^{(-5)\) mol * 63.55 g/mol ≈ \(1.32 * 10^{(-3)} g\)

For silver (Ag):

n(Ag) = Q / F = 2 C / 96485 C/mol ≈ \(2.07 * 10^{(-5)\) mol

Mass(Ag) = n(Ag) * molar mass(Ag) = \(2.07 * 10^{(-5)\)mol * 107.87 g/mol ≈ \(2.23 * 10^{(-3)\\}g\)

Therefore, the mass of copper deposited is approximately \(1.32 * 10^{(-3)} g\), and the mass of silver deposited is approximately \(2.23 * 10^{(-3)\\}g\)

Know more about  copper   here:

https://brainly.com/question/29176517

#SPJ8

A: False, because the catalyst appears in the reactant and product in the main reaction, it will not appear in the product in the main reaction in this case

B: False, Catalysts speed up reaction by providing an alternative pathway for the reaction which have lower activation energy

C: True

D: False, Higher activation energy results in a slower reaction

E: False, it only provide an alternative pathway and do nothing with collisions

F: True

G: False, as I said before, catalyst does appears on the product and reactant side on the main reaction

H: True

Answer:

32.057 amu

Explanation:

\(\text{Average atomic mass = Mass}\times \text{abundances}\)

\(M=95\%\ \text{of}\ 31.972 +0.76\%\ \text{of}\ 32.971 +4.22\%\ \text{of}\ 33.967 \\\\M=\dfrac{95}{100}\times 31.972 +\dfrac{0.76}{100}\ \times \ 32.971 +\dfrac{4.22}{100} \times \ 33.967\\\\M=32.057\ \text{amu}\)

So, the average atomic mass of sulfur is 32.057 amu.

The average atomic mass of sulfur is 32.06 amu if 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971 amu and 4.22% have a mass of 33.967 amu.​

Sulfur is formed by 3 isotopes: 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971 amu and 4.22% have a mass of 33.967 amu.​

The average atomic mass (am) is a weighted average that takes into account the mass and the abundance of each isotope.

\(am = \frac{\Sigma m_i \times ab_i }{100} = \frac{31.972amu \times 95.00 + 32.971amu \times 0.76 + 33.967amu \times 4.22}{100} = 32.06 amu\)

The average atomic mass of sulfur is 32.06 amu if 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971 amu and 4.22% have a mass of 33.967 amu.​

Learn more: https://brainly.com/question/13753702

The resolution of the monochromator is 3.6nm

A monochromator is an optical device that is used to isolate a specific wavelength or range of wavelengths of light from a broader spectrum of light. It is typically used in spectroscopy, where the goal is to measure the intensity of light at a specific wavelength or over a range of wavelengths.

The resolution of a monochromator, Δλeff, is given by the equation: Δλeff = (D^-1) * (exit slit width)

Plugging in the given values:

Δλeff = (1.8 nm/mm) * (500 micrometers)

Converting micrometers to millimeters:

Δλeff = (1.8 nm/mm) * (0.5 mm)

Δλeff = 3.6 nm

Learn more on monochromator here;

https://brainly.com/question/917245

#SPJ1

Answer:

6.400 g oxygen is the answer

Answer: 110g

Explanation:

110 g" Your strategy here will be to use Avogadro's number to calculate how many moles of carbon dioxide would contain that many molecules

The answer should be A

VisibleVisible wave length visible wavelength of light that are emitted by Adams can be used to get Nate explosive devices remotely

The correct answer is: Atoms are the building blocks that make up elements. At the center of each atom is a nucleus composed of small particles called protons and neutrons. Nuclei is the plural of nucleus; option C.

The atomic number of an element is the number of protons present in the nucleus of the atom of the element.

The nucleus is the center of the atom and is the heaviest part of the atom.

Another sub-atomic particle fund in the nucleus is the neutron.

Elements are named according to the number of protons in the nuclei.. This is because the number of protons in the nucleus of any given atom whereas the neutron number may vary, Also, electrons are easily removed from atoms of elements.

In conclusion, the number of protos in atom is used to name the atom.

Learn more about atomic number at: https://brainly.com/question/487717

#SPJ1

Answer:

kinectic energy

Explanation:

............

There are two types of energy that a massive body posses are kinetic energy and potential energy. When a ball falling through air it posse both of these energy but kinetic energy increases on movement.

Mechanical energy of a body is the sum of potential energy and kinetic energy . Kinetic energy is generated by the movement of the body. Whereas, potential energy forms by virtue of its position.

Kinetic energy increases when a body  starts to move where, the potential energy decreases.

Potential energy of a body raises as its height from the surface increases.  The equation relating mass, height and gravity is p= Mgh.

According to law of conservation of energy the mechanical energy of a  a freely falling body remains constant. When it is at the height from the surface it experience potential energy and when starts to fall it gains kinetic energy.

Therefore, the energy that a ball falling through the air is mechanical energy.

To find more about mechanical energy, refer the link below:

https://brainly.com/question/13552918

#SPJ2

Answer:

45

Explanation:

I am math teacher

Answer:0

Explanation:

Answer:

A

Explanation:

since Mg has a charge of +2 and ClO3 has a charge of 1-, you need 2 ClO3 to cancel out the +2 since 2 ClO3 ions would have a 2- charge

Answer:

Mg(ClO3)2

Explanation:

i know my chemestry

Answer:

b. vapor

Explanation:

When a liquid substance is heated sufficiently, the energy from the heat causes the molecules to gain enough kinetic energy to break the intermolecular bonds and escape into the air as individual gas molecules. This process is called evaporation, and the substance in this gaseous form is known as a vapor. The term "vapor" refers to the gaseous form of a substance that was originally in a liquid state, and it typically refers to the mixture of gas molecules that are in constant motion and in contact with the air.

Answer:

Here is the answer...

Explanation:

Option A is used to control sample that is known to be form.

Answer:

15%

Explanation:

From the question given above, the following data were obtained:

Mass of sugar = 15 g

Mass of water = 85 g

Percentage of sugar in the solution =?

Next, we shall determine the mass of the solution. This can be obtained as follow:

Mass of solute (sugar) = 15 g

Mass of solvent (water) = 85 g

Mass of solution =?

Mass of solution = mass of solute + mass of solvent

Mass of solution = 15 + 85

Mass of solution = 100 g

Finally, we shall determine the percentage of the sugar in the solution. This can be obtained as follow:

Mass of solute (sugar) = 15 g

Mass of solution = 100 g

Percentage of sugar in the solution =?

Percentage = solute /solution × 100

Percentage = 15 / 100 × 100

Percentage of sugar in the solution = 15%

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

To know more about spectrometry, here

brainly.com/question/31075363

#SPJ1

Explanation:

Formaldeyde

Lewis Structure:

Structural diagram:

3D diagram.

When 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

The balanced chemical equation shows that 2 moles of KCIO3 decompose to produce 3 moles of O2. Therefore, we can use the stoichiometric ratio from the balanced equation to determine the number of moles of O2 formed when 2.0 moles of KCIO3 decompose.

According to the stoichiometry, 2 moles of KCIO3 produce 3 moles of O2. Therefore, we can set up a proportion:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

where x represents the unknown number of moles of O2 formed.

Simplifying the equation:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

1 = (2.0 moles KCIO3 / x moles O2),

Cross-multiplying:

x moles O2 = (2.0 moles KCIO3 / 1),

x moles O2 = 2.0 moles KCIO3.

Therefore, when 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

It is important to note that this calculation assumes complete and ideal conditions, where the reaction proceeds with 100% efficiency. In reality, the actual yield of O2 may be lower due to various factors such as side reactions or incomplete decomposition. To determine the actual yield, additional information or experimental data would be required.

For more such questions on decompose visit:

https://brainly.com/question/14608831

#SPJ8

Answer:

polarity

Explanation:

because of its polarity it can dissolve mutiple substance

There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

For more such question on aluminum visit:

https://brainly.com/question/30451292

#SPJ8

Answer:

287.6g CHCl₃

Explanation:

We can determine the structure of Chloroform, dividing the mass of each element in its molar mass:

C = 12.0g * (1mol /12g) = 1 mol C

H = 1.01g * (1mol / 1.01g) = 1 mol H

Cl = 106.4g * (1mol / 35.45g) = 3 moles Cl

The structure is CHCl₃. And its molar mass is: 12.0g C +1.01g H + 106.4g Cl = 119.41g/mol

Now, the moles of carbon in the second sample = Moles of chloroform are:

28.9g C * (1mol / 12g) = 2.408 moles C = Moles CHCl₃

And its mass is:

2.408 moles CHCl₃ * (119.41g/mol) =

Answer:

(a) 3.33 mol Bi

(b) 140. g CO

Explanation:

Step 1: Convert 775g to moles

Bi Molar Mass - 208.98 g/mol × 2 = 417.98 g/mol

O Molar Mass - 16.00 g/mol × 3 = 48.00 g/mol

775g Bi₂O₃ ÷ 465.98 g/mol = 1.66316 mol Bi₂O₃

Step 2: Find the conversion from Bi₂O₃ to Bi

1 mole of Bi₂O₃ equals 2 moles of Bi

Step 3: Use Dimensional Analysis

1.66316 mol  ·  \(\frac{2 \hspace{2} mol \hspace{2} Bi}{1 \hspace{2} mol \hspace{2} Bi_2O_3}\) = 3.32632 mol Bi

3.32632 mol Bi ≈ 3.33 mol Bi (3 significant figures)

Step 4: Find the conversion from Bi₂O₃ to CO

1 mole of Bi₂O₃ equals 3 moles of CO

Step 5: Use Dimensional Analysis

1.66316 mol  · \(\frac{3 \hspace{2} mol \hspace{2} CO}{1 \hspace{2} mol \hspace{2} Bi_2O_3}\) = 4.98948 mol CO

Step 6: Find molar mass of CO and convert moles to grams

C - 12.01 g/mol

O - 16.00 g/mol

4.98948 mol CO · 28.01 g/mol = 139.775 g CO

139.775 g CO ≈ 140. g CO (3 significant figures)

9.0 g of C6H12O6 contain 3.01 x 10²³ molecules of glucose.

The result is 180.156, with grammes per mole being the unit. Hence, the mass of glucose is 90 and its molar mass is 180.156, giving us the moles of glucose, which are roughly 1.5 moles.

We can convert grammes to moles using the molar mass of glucose, and then moles to molecules using Avogadro's number:

1 mole C6H12O6 = 180 g C6H12O6

90.0 g C6H12O6 = (90.0 g C6H12O6) / (180 g/mol) = 0.5 mol C6H12O6

1 mol C6H12O6 = 6.02 x 10²³ molecules C6H12O6

0.5 mol C6H12O6 = (0.5 mol C6H12O6) x (6.02 x 10²³ molecules/mol) = 3.01 x 10²³ molecules C6H12O6

To know more about molecules visit:-

https://brainly.com/question/19556990

#SPJ1

The correct formula for the compound that forms between aluminum (Al) and sulfur (S) is (d) Al₂S₃.

The correct option is E, none of the above.

The reaction between aluminum (Al) and sulfur (S) is an example of a chemical reaction known as a combination or synthesis reaction. In this reaction, aluminum and sulfur combine to form a

.

The chemical equation for the reaction is:

2Al + 3S → Al₂S₃

Aluminum has a 3+ charge (Al³⁺) and sulfur has a 2- charge (S²⁻). In order to balance the charges, two aluminum ions (Al³⁺) are needed to combine with three sulfur ions (S²⁻), resulting in the formula Al₂S.

Learn more about compounds at: https://brainly.com/question/14782984

#SPJ1

Answer:

a top predator, fighting

The correct answer to an enzyme is B) binds substrates in a manner that facilitates the formation of product.

Enzymes are biological catalysts that speed up chemical reactions in living organisms. They do this by binding to substrates (the reactants in a chemical reaction) and facilitating the formation of product.

This is done by lowering the activation energy required for the reaction to occur, making it easier for the reaction to take place. Enzymes do not change the position of the equilibrium of the reaction, nor do they decrease the rate of the reaction.

Enzymes also do not change the rate at which the equilibrium is achieved. Lastly, enzymes are not always proteins, as some RNA molecules can also function as enzymes. Therefore, the correct answer is B) binds substrates in a manner that facilitates the formation of product.

To know more about Enzymes refer here:

https://brainly.com/question/14953274

#SPJ11

Answer:

C

Explanation:

Answer:

c

Explanation:

there are billions of cells in living things. We are made out of millions of cells

Answer:

D is the answer

Explanation: