is this reaction oxidation or reduction
CH2=CH2 + OsO4 yields to HOCH2CH2OH

Answer:

a) 18

b)288g

Explanation:

a) 1:4

4.5mol TiCl4 so HCl is 4(4.5mol)

b) mm of HCl is 36

because 1:4 we multiply 2.0 mol by 4

8mol of HCl

we multiply 8mol by 36 (molar mass of HCl) and we get 288g because mol×molar mass= grams

Answer:

I’ll give you two possible conditions:

(1) An acid is present in an aqueous solution. The acid will donate a proton to the water to form hydronium. (That’s not really what happens, but that’s how we usually think of it.)

(2) The autoionization of water: in a pure water solution (or not a pure solution, doesn’t matter), one water molecule donates a proton to another water molecule, forming equal numbers of hydronium and hydroxide ions.

The density of the magnetite sample would be 5.2g/cm^3.

A body's density is defined as its mass per unit volume. Density is a measurement that compares the amount of matter (denseness) a body has to its volume. It is the degree of consistency of a body measured by the quantity of mass per unit volume. It is the relationship between the mass of the substance or body and the amount of space it takes up. An object with much matter in a certain volume will have a high density.

Density = mass/volume

From the question;

mass = 42g

volume = 8.1cm^3

Density = 42/8.1

Density = 5.2g/cm^3

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Answer:

Beryllium and magnesium will show similar chemical reactions as calcium. Since these elements belong to same group II and also have two electrons in their outermost shell like calcium.

Answer:

Bias can cause the results of a scientific study to be disproportionately weighted in favor of one result or group of subjects. This can cause misunderstandings of natural processes that may make conclusions drawn from the data unreliable.

Explanation:

The electron cloud of HF is smaller than that of F₂. The following explains the dispersion-force model of intermolecular attraction does not account for the unusually high boiling point of HF is : liquid  F₂ has weak dispersion force of attraction between the molecules and HF has both the weak dispersion force of attraction and hydrogen bonding between molecule.

The both dispersion force and the hydrogen bonding intermolecular attraction is present in the molecule of HF. this is the reason that HF has much higher boiling point than F₂. HF has high electronegativity difference between atoms, the molecules of HF will be tightly packed and have higher boiling point.

Thus, The electron cloud of HF is smaller than that of F₂. The following explains the dispersion-force model of intermolecular attraction does not account for the unusually high boiling point of HF is : liquid  F₂ has weak dispersion force of attraction between the molecules and HF has both the weak dispersion force of attraction and hydrogen bonding between molecule.

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If we connect the two flasks through a stopcock and open the stopcock, we will obtain the total pressure of 285 torr.

To solve this problem, we will use the formula P₁V₁=P₂V₂, where P stands for pressure and V stands for volume.

The pressure of helium in the first flask is 750 torr and the volume of the first flask is 285 mL.

The pressure of argon in the second flask is 722 torr and the volume of the second flask is 465 mL.

P₁V₁ = P₂V₂ (Boyle's law)

750 torr × 285 mL = 722 torr × 465 mL

213750 torr-mL = 335430 torr-mL

When the two flasks are connected, the volume is now the sum of the volumes of the two flasks, which is 285 mL + 465 mL = 750 mL.

To find the total pressure, we will use the formula P₁V₁ = P₂V₂ = P₃V₃, where P₃ is the total pressure and V₃ is the total volume.

P₁V₁ = P₃V₃

(213750 torr-mL)/750 mL = 285 torr

Therefore, the total pressure is 285 torr.

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Answer:

Convection can only happen with liquids and gases.

Hope it helps :)

1a. The mass of of C₅H₁₂ is 108 g

1b. The mass of F₂ is 547.2 g

1c. The mass of H₂O₂ is 238 g

1d. The mass of NaOH is 31.2 g

2a. The volume of Ar is 176.96 L

2b. The volume of O₂ is 10.08 L

2c. The volume of C₂H₆ is 27.552 L

The mass of C₅H₁₂ can be obtained as follow:

Mass = Mole × molar mass

Mass of C₅H₁₂ = 1.5 × 72

Mass of C₅H₁₂ = 108 g

The mass of F₂ can be obtained as follow:

Mass = Mole × molar mass

Mass of F₂ = 14.4 × 38

Mass of F₂ = 547.2 g

The mass of H₂O₂ can be obtained as follow:

Mass = Mole × molar mass

Mass of H₂O₂ = 7 × 34

Mass of H₂O₂ = 238 g

The mass of NaOH can be obtained as follow:

Mass = Mole × molar mass

Mass of NaOH = 0.780 × 40

Mass of NaOH = 31.2 g

The volume of Ar can be obtained as follow:

Volume = mole × molar volume at STP

Volume of Ar = 7.9 × 22.4

Volume of Ar = 176.96 L

The volume of O₂ can be obtained as follow:

Volume = mole × molar volume at STP

Volume of O₂ = 0.45 × 22.4

Volume of O₂ = 10.08 L

The volume of C₂H₆ can be obtained as follow:

Volume = mole × molar volume at STP

Volume of C₂H₆ = 1.23 × 22.4

Volume of C₂H₆ = 27.552 L

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Answer:

bleh

Explanation:

Neutralization reaction between magnesium hydroxide and hydrochloric acid Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

so uh pretty sure Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

correct me if im wrong <3

0.250 M solutions of HNO2 and CH3CO2H contain the major species H3O+, NO2- and CH3COOH, respectively, and the pH of each solution is equal to -log(0.250) = -(-2) = 2.

The major species present in 0.250 M solutions of HNO2 and CH3CO2H (HC2H3O2) are H3O+, NO2- and CH3COOH, respectively.

The H3O+ ion is the proton (H+) of the acid, while NO2- and CH3COOH are the conjugate base and acid, respectively.

The pH of the solution can be calculated by taking the negative logarithm of the concentration of H3O+ ions.

In the case of HNO2, the concentration of H3O+ ions is equal to the concentration of the acid, so the pH of the solution would be equal to -log(0.250) = -(-2) = 2.

Similarly, the pH of the solution of CH3CO2H is equal to -log(0.250) = -(-2) = 2.

It is important to note that in 0.250 M solutions of both HNO2 and CH3CO2H, the concentration of the conjugate base (NO2- and CH3COOH, respectively) is equal to the concentration of the acid.

This is because the dissociation of both acids is 100%.

To summarize, 0.250 M solutions of HNO2 and CH3CO2H contain the major species H3O+, NO2- and CH3COOH, respectively, and the pH of each solution is equal to -log(0.250) = -(-2) = 2.

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14 electrons in an atom can share the quantum numbers n = 4 and l = 3

32 electrons can be held in the energy level n = 4

An electron is negatively charged subatomic particles that can be either bound to an atom or free means not bound and fourteen electron can be represented by the value n = 4 and I = 3 and quantum number n = 4 is the fourth energy level and which can be thought of as the distance from the nucleus and if I = 3 the electron are in f subshell and the number of orbital with a quantum number I is 2I + 1 so there are 2×3+1 = 7 f orbital so each orbital can hold two electron and so the f subshell can hold 14 electron

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Answer:

Parasitism. A symbiotic relationship between two species in which one benefits and the other is harmed.

Explanation:

:)

The boiling point of a solution that contains each of the following quantity of solute in 1.00 kg of water is depending on factors such as pressure and the specific solute used..

The boiling point of a solution depends on the amount of solute dissolved in it. Here are the boiling points for various quantities of solute in 1.00 kg of water:

a. For a solution with 1 mole of a non-electrolyte solute (such as glucose), the boiling point elevation is approximately 0.51 °C. Therefore, the boiling point of this solution would be 100.51 °C.

b. For a solution with 1 mole of an electrolyte solute (such as NaCl), the boiling point elevation is approximately 0.52 °C. Therefore, the boiling point of this solution would be 100.52 °C.

c. For a solution with 1 gram of a non-electrolyte solute (such as glucose), the boiling point elevation is approximately 0.002 °C. Therefore, the boiling point of this solution would be 100.002 °C.

d. For a solution with 1 gram of an electrolyte solute (such as NaCl), the boiling point elevation is approximately 0.0021 °C. Therefore, the boiling point of this solution would be 100.0021 °C.

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Copper used in electric wires comes in two flavors (isotopes): Cu-63 and Cu-65. Cu-63 has an atomic mass of 62.9298 amu and an abundance of 69.09%. The other isotope, Cu-65, has an abundance of 30.91%. The average atomic mass between these two isotopes is 63.546 amu is 64.93 amu.

Average atomic mass = sum of masses of isotopes multiply by  % of abundance

Cu - 63, mass =  62.9298 amu,   % abundance = 69.09 %

Cu - 65, mass m2 = ?   % abundance = 30.91 %

average atomic mass = 63.546 amu

average atomic mass = ( 62.9298 × 0.6909 ) + ( m2 × 0.3091 )

63.546 =  ( 62.9298 × 0.6909 ) + ( m2 × 0.3091 )

m2 = 64.93 amu

Thus, Copper used in electric wires comes in two flavors (isotopes): Cu-63 and Cu-65. Cu-63 has an atomic mass of 62.9298 amu and an abundance of 69.09%. The other isotope, Cu-65, has an abundance of 30.91%. The average atomic mass between these two isotopes is 63.546 amu is 64.93 amu.

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the volume of a 1.80 M solution of potassium chloride that is required to prepare 0.100 L of a 0.600 M solution is 0.0333 L, or 33.3 mL.

To determine the volume of a 1.80 M solution of potassium chloride that is required to prepare 0.100 L of a 0.600 M solution, we can use the formula:

M1V1 = M2V2

where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.

Let's use this formula to solve the problem:

M1 = 1.80 M (since we are starting with a 1.80 M solution)

V1 = ? (what we are trying to find)

M2 = 0.600 M (since we want to prepare a 0.600 M solution)

V2 = 0.100 L (since we want to prepare 0.100 L of the final solution)

Substituting these values into the formula, we get:

1.80 M x V1 = 0.600 M x 0.100 L

Simplifying, we get:

V1 = (0.600 M x 0.100 L) / 1.80 M

V1 = 0.0333 L, or 33.3 mL

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Explanation:

The graphite anodes are suspended into the brine. During electrolysis, Cl ions are oxidized at the anode and chlorine gas goes out of the cell, while sodium ions are reduced at the mercury cathode forming sodium amalgam. ... Hydrogen gas is obtained as a by–product at the cathode.

Answer:

D. Moving north at 40 km/hr

Explanation:

velocity is just speed of something in a given direction

Potassium permanganate and methylene blue were run twice in the experiment to ensure the accuracy and reliability of the results and to account for any experimental errors or variations.

Running potassium permanganate and methylene blue twice in the experiment serves several purposes:

Validation of Results: Running the experiments twice allows for the comparison of the results obtained in each trial. If the results from both trials are consistent and show similar trends, it increases confidence in the accuracy of the measurements.

Error Detection: Conducting multiple trials helps identify and address any experimental errors or variations that may occur. If there are discrepancies between the results of the two trials, it suggests the presence of systematic errors or inconsistencies that need to be investigated and resolved.

Data Averaging: By running the experiments twice, it provides the opportunity to calculate the average of the results from both trials. Averaging the data can help reduce random errors and provide a more representative value.

Quality Control: Conducting duplicate experiments is a common practice in scientific research and experiments to ensure quality control. It allows for the assessment of the precision and reproducibility of the measurements.

The decision to run potassium permanganate and methylene blue twice in the experiment is made to enhance the reliability and accuracy of the results. It helps validate the findings, detect and address experimental errors, enable data averaging, and ensure quality control. Running duplicate trials is a common approach in scientific experiments to improve the robustness of the data and increase confidence in the obtained results.

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The pH value of 0.115 M HC2H3O2(aq) is determined to be 2.92 using a pH probe. From this information, we can calculate the value of Ka for HC2H3O2(aq) and determine the percent dissociation of ethanoic acid in the solution.

1. To calculate Ka, we can use the equation for the dissociation of HC2H3O2: HC2H3O2(aq) ⇌ H+(aq) + C2H3O2-(aq)

2. The concentration of H+ ions can be calculated using the formula: 10^(-pH). In this case, [H+] = 10^(-2.92).

3. Since HC2H3O2 is a weak acid, the concentration of H+ ions formed from its dissociation can be assumed to be equal to the initial concentration of HC2H3O2. Therefore, [H+] = [C2H3O2-] = 0.115 M.

4. Now we can calculate Ka using the formula: Ka = [H+][C2H3O2-]/[HC2H3O2].

5. Substituting the known values, we have: Ka = (0.115)(0.115)/(0.115) = 0.115, So the value of Ka for HC2H3O2 is 0.115.

6. To calculate the percent dissociation of ethanoic acid, we need to determine the concentration of dissociated HC2H3O2 and compare it to the initial concentration.

7. The percent dissociation can be calculated using the formula: Percent dissociation = (concentration of dissociated acid/initial concentration of acid) * 100.

8. In this case, since the concentration of H+ ions formed from dissociation is equal to the initial concentration of HC2H3O2, the concentration of dissociated acid is 0.115 M. Therefore, the percent dissociation is (0.115/0.115) * 100 = 100%.

9. In summary, the value of Ka for HC2H3O2 is calculated to be 0.115. This indicates the strength of the acid, with a higher Ka value indicating a stronger acid. Additionally, the percent dissociation of ethanoic acid in the 0.115 M HC2H3O2 solution is determined to be 100%, indicating that all of the ethanoic acid molecules have dissociated into ions in the solution. This suggests that ethanoic acid is a strong electrolyte in this concentration.

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Answer:

48 teaspoons

Explanation:

1 cup equals 48 teaspoons.

Therefore, based on these arguments, it can be said that cows are the single most significant species in modern agriculture because they offer numerous food sources, other necessary products, and the capacity to adapt to different situations.

Our requirements for milk are met by milk-producing animals, also referred to as milch cattle. In agricultural areas, draught cattle are used for tasks like tilling, irrigation, and carting.

In addition to providing much-needed revenue and nitrogen-rich manure for reviving soils and other purposes, cattle are a vitally important daily source of food, nutrition, and other essentials. Additionally, they play a variety of sociocultural responsibilities.

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Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules

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Answer:

increase moles of gas inside

Explanation:

Answer:

Its ( C )- Decrease the temperature of the gas inside the basketball

Explanation:

To make sure the balloon doesn't inflate so much it bursts you should NOT completely inflate the balloons when you know the temperature will increase!

Answer:

Spinal Cord

Explanation:

The spinal cord is part of the central nervous system.

The lungs are part of the respiratory system.

The heart is part of the cardiovascular system.

The pancreas is part of the digestive system.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.

The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.  

There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.

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Answer: Question 4 and Question 2 are false.

Explanation:

For question 4 is false because some microorganisms are not harmful, in fact some are quite helpful and less than one percent of microorganisms are harmful to humans.

And for question 2 is false because for most living microorganisms it is required for microorganisms to eat and live in survivable conditions.

Also viruses are not classified as a living thing because of their lack of a host cell.

Answer:

Cl2

Explanation:

Bcs in product there is chorine