Which of the following reaction mixtures would produce the greatest amount of product, assuming all went to completion? Each involves the reaction symbolized by the equation:

Based on the data, the missing error percentages would be 0%, 13.6%, -2.22%, and -10.7%.

The error percentage as indicated by its name shows in a percentage, the difference between an estimated value and the real value or value measured during an experiment. Based on this, in this case, you are required to find the difference between the value registered in the table for each material and the standard. The general formula for this is:

Percentage Error = ((Standard – Actual Number)/ Standard) x 100.

Water: 4.18 vs 4.18  = 0%

Concrete: 0.88 vs 1 = 13.6%

Wood: 1.80 vs 1.76  = -2.22%

Glass: 0.84 vs 0.75  = -10.7%

Sand: 0.83 vs 0.83 = 0%

Steel: 0.49 vs 0.42 = -14.2%

Iron: 0.44 vs 0.45 = 2.27%

Cooper: 0.38 vs 0.38 = 0%

Lead: 0.16 vs 0.12  =-25%

Gold: 0.13 vs 0.03  = -76.9%

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The quantity of moles in 57.0grams of RbF is 0.545mol.

Moles is the base unit of amount of substance i.e. the amount of substance of a system which contains exactly 6.022 × 10²³ elementary entities (atoms, ions, molecules, etc.).

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.

No of moles = mass ÷ molar mass

Molar mass of RbF = 85.467 + 18.998 = 104.5g/mol

moles = 57.0g ÷ 104.5g/mol = 0.545mol

Therefore, 0.545moles is the quantity of moles of RbF in 57.0grams of the compound.

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The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.

Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.

This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.

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Answer:

A.) Thermal

Explanation:

I got it correct on founders edtell

Answer:

D highland

Explanation:

Answer:

A or C

Explanation:

it's one of those answers I'm sure of

The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

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The molar volume and average molar volume of propane, butane, and methane at STP are 24.45 L/mol , 24.93 L/mol ; 28.02 L/mol , 24.93 L/mol and 22.41 L/mol , 24.93 L/mol respectively.

The molar volume of a gas is defined as the volume occupied by one mole of gas at standard temperature and pressure (STP), which is defined as 0°C and 1 atm.

The molar volume of a gas can be calculated using the ideal gas law,

PV = nRT,

where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature in kelvins.The molar volumes of propane, butane, and methane at STP can be calculated as follows:

Propane: C₃H₈

At STP (0°C and 1 atm), the molar volume of propane can be calculated as:

V = (nRT) / P

V = (n x 0.0821 x (273.15 + 0) / 1) / 1

V = 24.45 L/mol

Butane: C₄H₁₀

At STP (0°C and 1 atm), the molar volume of butane can be calculated as:

V = (nRT) / P

V = (n x 0.0821 x (273.15 + 0) / 1) / 1

V = 28.02 L/mol

Methane: CH₄

At STP (0°C and 1 atm), the molar volume of methane can be calculated as:

V = (nRT) / P

V = (n x 0.0821 x (273.15 + 0) / 1) / 1

V = 22.41 L/mol

The average molar volume is the sum of the molar volumes divided by the number of gases:

Average molar volume = (24.45 + 28.02 + 22.41) / 3

Average molar volume = 24.93 L/mol

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Answer:

pollution causes smog

Smoke fog, or smog for short, is a type of intense air pollution.

it makes GHG wich is greenhouse gas and it makes the smog to stay inside the earth wich heats the Earth and it causes flood, storm, tornadoes, ect.

1. It is also known as the dark reaction of photosynthesis: Off.

2. Primary acceptor of carbon is Photosystem I and II: On.

3. Site of the process is in the stroma: Off.

4. Photolysis of water does not occur: Off.

5. Process type is both cyclic and non-cyclic processes: On.

6. It is a release of oxygen that gives off aldehydes and hydrogen upon dehydrogenation: On.

7. It is a process that converts solar energy into chemical energy: On.

8. It is a light dependent process: On.

9. Process type is cyclic only: Off.

10. Primary acceptor of carbon is Rubiscobisphosphate: Off.

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To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

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The mass in grams of 3.011 x 10²³ atoms of F is 9.5 g.

The mass in grams of  1.50 x 10²³ atoms of Mg is 5.98 g.

The mass in grams of  4.50 x 10¹² atoms of Cl is 2.65 x 10⁻¹⁰ g.

The mass in grams of  8.42 x 10¹⁸ atoms of Br is 1.12 x 10⁻³ g.

The mass in grams of  25 atoms of W is 3.1 x 10⁻²¹ g.

The mass in grams of  1 atom of Au is 3.27 x 10⁻²² g.

The mass in grams of 3.011 x 10²³ atoms of F is calculated as follows;

6.023 x 10²³ atoms = 19 g of F

3.011 x 10²³ atoms F  = ?

= (3.011 x 10²³ x 19 g)/(6.023 x 10²³)

= 9.5 g

The mass in grams of  1.50 x 10²³ atoms of Mg is calculated as follows;

6.023 x 10²³ atoms = 24g of Mg

1.5 x 10²³ atoms F  = ?

= (1.5 x 10²³ x 24 g)/(6.023 x 10²³)

= 5.98 g

The mass in grams of  4.50 x 10¹² atoms of Cl is calculated as follows;

6.023 x 10²³ atoms = 35.5 g of Cl

4.5 x 10²³ atoms Cl  = ?

= (4.5 x 10¹² x 35.5 g)/(6.023 x 10²³)

= 2.65 x 10⁻¹⁰ g

The mass in grams of  8.42 x 10¹⁸ atoms of Br is calculated as follows;

6.023 x 10²³ atoms = 80 g of Br

8.42 x 10¹⁸ atoms Br = ?

= (8.42 x 10¹⁸  x 80 g)/(6.023 x 10²³)

= 1.12 x 10⁻³ g

The mass in grams of  25 atoms of W is calculated as follows;

6.023 x 10²³ atoms = 74 g of W

25 atoms W = ?

= (25  x 74 g)/(6.023 x 10²³)

= 3.1 x 10⁻²¹ g

The mass in grams of  1 atom of Au is calculated as follows;

6.023 x 10²³ atoms = 197 g of Au

1 atom of Au = ?

= (1  x 197 g)/(6.023 x 10²³)

= 3.27 x 10⁻²² g

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The question is incomplete; the complete question is;

Identify the possible issues if a sample in a spectrophotometer gives no reading. Select one or more:

The wrong wavelength may be set.

The sample may be placed improperly in the cuvette holder.

There may be an issue with the composition of the sample.

There may be an issue with the spectrophotometer

Answer:

The wrong wavelength may be set.

There may be an issue with the spectrophotometer

Explanation:

Substances do not absorb radiation at all wavelengths. The proper wavelength at which a substance absorbs must be used for a reading to be obtained from the spectrophotometer. If this is not done, no reading is obtained from the spectrophotometer.

Generally, if the spectrophotometer has an issue, it may display no reading until the machine is fixed.

The possible issues if a sample in a spectrophotometer gives no reading are:

According to the given question, we are asked to identify the possible reasons why a spectrophotometer would give no reading when a sample is used on it.

As a result of this, it is important to note that it is possible that the sample may not have been placed correctly on the cuvette holder or the wrong wavelength may be set which would cause the no reading error to show.

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Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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The charged particles involved in  Thomson’s cathode–ray tube experiment is the negatively charged particles that we now call electrons.

The charged particles involved in the mass spectrometer is positively charged ions that is being deflected by magnetic fields.

The Mass spectrometer is an analytical tool that is used to measure the mass-to-charge ratio of ions.

One of the advantages of the mass spectrometer is that it is an excellent tool for identifying unknown components in a sample or confirming their presence.

The major disadvantages of mass spectrometer is that it is not very good at identifying hydrocarbons that produce similar ions and it's unable to tell optical and geometrical isomers apart.

In conclusion, some applications of mass spectrometer includes drug testing and discovery, food contamination detection.

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Answer:

the brightness of a star depends on its composition and how far it is from the planet

If a teacher showed an animal to students on a field trip. The  tool will allow the students to best see the animal up close is the hand lens.

Option D is correct.

A hand lens is known as a magnifying glass  which is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle.

A hand lens  has two essential properties which are its focal length and its diameter.

The students will therefore require a hand lens to look up the animal close.

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#complete question:

A teacher showed this animal to students on a field trip. Which tool will allow the students to best see the animal up close? O A Tape measure O B Graduated cylinder O c. Notebook O D. Hand lens

If you accidentally add salt instead of sugar to a recipe, you can use vinegar to counteract the salty taste.

If you have added salt instead of sugar to a recipe, then you can try to remove the salt by adding a substance that will counteract its flavor. One such substance is vinegar, which is an acid and can help to neutralize the salty taste. Here are the steps to remove salt from a dish:

1. Remove as much of the salty liquid or sauce as possible.

2. Dilute the remaining sauce or liquid by adding more of the ingredients in the recipe, except for the salt

3. Taste the dish and add more sugar if needed.

4. If the dish is still too salty, add a little bit of vinegar.

5. Keep tasting the dish and adjusting the sugar and vinegar until it is no longer too salty.6. If the dish becomes too sweet, add more of the other ingredients to balance it out.

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A polarimeter fundamental working principle entails the following: By passing light via a polarizer, one can produce light with a precisely prepared linear polarisation state.

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Answer:

36% m/v

Explanation:

An antibiotic solution must be prepared by diluting 100. mL of a 90. % m/v solution and bringing up the volume to 250 mL. What is the concentration of the resulting solution?

the new solution is 100/250 X 90% m/v = 36% m/v

The concentration of the resulting antibiotics solution that must be prepared by diluting 100mL of a 90. % m/v solution and bringing up the volume to 250 mL is 36% m/v.

The concentration of a solution can be calculated by using the following formula:

C1V1 = C2V2

Where;

90% m/v × 100 = C2 × 250

9000 = 250C2

C2 = 36% m/v

Therefore, the concentration of the resulting antibiotics solution that must be prepared by diluting 100mL of a 90. % m/v solution and bringing up the volume to 250 mL is 36% m/v.

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Answer:5.63 atm

Explanation: Dalton's Law states that total pressure of a mixture of gasses is equal to the sum of partial pressure of each gas.

\(P_{tot} = P_{1} +P_{2}+ P_{3}...\)

We are given pressure O2 and pressure Cl2.

Step 1: First, convert 3040mmHg to atm by dividing by 760.

\(\frac{3040mmHg}{760atm} = 4 atm\)

Step 2: Plug your numbers into the equation

\(P_{tot} = P_{O2} +P_{Cl2}\)

\(P_{tot} = 4atm + 1.63 atm = 5.63 atm\)

A titration is a method where the concentration of an unknown solution is ascertained by comparing it to a solution of known concentration.

Titration is a method of chemical analysis where the amount of a sample's ingredient is determined by adding an exact known amount of a different substance to the measured sample, which the desired constituent reacts with in a specific, known proportion.

An acid-base titration involves gradually adding an unknown base to an acid solution with a known concentration (a standard solution) (or vice versa). To the base, you add a few drops of indicator solution. When the base has been neutralized (when [H+] Equals [OH-]), the indicator's color will change to indicate this. A substance's color changing due to a chemical reaction is an indicator. The pH affects the color of an acid-base indicator, such as phenolphthalein. It is also used redox indicators.

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The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

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Answer:

0.551 moles

Explanation:

To calculate the number of moles in 22 grams of argon, divide the mass by the molar mass:

Number of moles = Mass / Molar mass

Number of moles = 22 g / 39.95 g/mol

Number of moles ≈ 0.551 moles

Therefore, there are approximately 0.551 moles of argon in 22 grams of argon.

Letter A indicates the overall enthalpy of reaction

Which exists equivalent to  2,538.90 kJ  

Letter B indicates the activation energy for the reaction

The activated complex exists denoted by letter C  

The change in the enthalpy of a chemical reaction that takes place at constant pressure is known as the Heat of Reaction (also known as the Enthalpy of Reaction). It is a thermodynamic unit of measurement that can be used to determine how much energy is released or created per mole during a reaction.

1. Letter __ shows the overall enthalpy of reaction

The change in enthalpy of the components is equivalent to the total enthalpy of the reaction:

Enthalpy of reaction = ∑ enthalpy of the products - ∑ enthalpy of the reactants.

The products exists shown of the right side of the diagram. They exists C₆H₁₂O₆(g) and 6O₂(g).

The reactants exists shown of the left side of the diagram. They exists 6CO₂(g) and 6H₂O(g).

The arrow labeled A shows the difference between the enthalpies of the products and the reactants; therefore, this shows the overall enthalpy of reaction.

2. which is equal to kJ__

The initial state's reactants' enthalpy must be subtracted from the final state's enthalpy (products).

Enthalpy of reaction as a whole: 1,273.02kJ ( - 3,811.92kJ)

Enthalpy of the entire reaction is 2,538.90 kJ.

This indicates that the reaction is endothermic because of the positive change.

3. Letter ___ shows the activation energy for the reaction

The energy that the reactants must acquire for the reaction to take place is known as the activation energy.

Therefore, it is the difference between the starting state and the maximum energy, which is denoted by the label C on the graph.

The arrow labeled B illustrates this: for the reactants to achieve the energy of the state labeled C, they must gain the energy indicated by the arrow labeled B.

4. The activated complex is represented by ____

The substance known as the activated complex is created as the reactants break their connections and begin to make new bonds in the products. The term "transition state" is sometimes used.

The activated complex has the maximum energy, hence it is at the top of the energy diagram. Energy is always needed for the activated complex to develop (it is an endothermic process). Energy is released after it forms, and the reactants are created (this part is exothermic).

Therefore, the activated complex exists labeled with the letter C.

The complete question is:

Use the graph to answer these questions. For numerical answers, use correct significant digits.

Letter __ shows the overall enthalpy of reaction

which is equal to kJ__

Letter ___ shows the activation energy for the reaction

The activated complex is represented by

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Answer:

According to Coulomb’s law, the electric force between two identical negative charges is inversely proportional to the square of the distance between them. This means that as the distance between the two charges decreases, the electric force between them will increase. Since the charges are both negative, they will repel each other, so as they move closer together, the repulsive force between them will become stronger.

Explanation:

Answer:

\($ CaCl_2$\), CaS, \($ Cr Cl_4$\), \($ CrS_2$\)

Explanation:

The reaction can be done by adding the cations and the anions.

The binary compounds are always formed by the two different elements.

When one calcium ion, \($ Ca ^{2+} $\) combines with the two calcium ions, \($ Cl^-$\), they formed a binary compound of \($ CaCl_2$\).

When one \($ Ca ^{2+} $\) combines with one \($S^{2-}$\) ion, they formed CaS binary compound.

When one chromium ion \($ Cr^{4+}$\) combines with four ions of chlorine, \($ Cl ^- $\), the compound formed is \($ Cr Cl_4$\).

When 1 ion of \($ Cr^{4+}$\) combines with 2 ions of sulphur, \($S^2$\), the binary compound formed is \($ CrS_2$\).