It takes to break a nitrogen-oxygen single bond. Calculate the maximum wavelength of light for which a nitrogen-oxygen single bond could be broken by absorbing a single photon.

Answer:

Methanol is the solvent in this solution.

Explanation:

Mixtures are the union of two or more pure substances, which can be classified as heterogeneous when the components of the mixture can be observed and homogeneous when the components cannot be observed (they are not distinguished).

When the mixtures are homogeneous, it can be said that they are chemical solutions.

In a solution you can distinguish solutes and solvent. A solute is a substance that dissolves in another with which it forms a solution. The solute is normally a solid, but it can also be a liquid or a gas. It is found in a lower proportion than the solvent in a solution.

It is called a "solvent", the element that dissolves in the other. That is, the solvent is the substance that dissolves a solute, forming a homogeneous solution. This is normally a liquid, but it can also be a solid or a gas. It is found in greater proportion than the solute in a solution.

In this case, since methanol is the component that has the greatest volume, it means that it is found in a greater proportion. So methanol is the solvent in this solution.

Answer:

Its (A) methanol

Explanation:

got 100% on test on edg2021

Answer:

The answer is 99.34 percent

84.0% was the percent yield of Al2O3 if 42. 4 g of Al reacted with extra oxygen and created 67 3 g of Al2O3.

To find the percent yield of Al2O3, we first need to calculate the theoretical yield, which is the maximum amount of Al2O3 that can be produced from the given amount of Al.

From the balanced equation, we can see that 4 moles of Al react with 3 moles of O2 to produce 2 moles of Al2O3.

So, the number of moles of Al in 42.4g is:

n(Al) = m/M = 42.4/26.98 = 1.572 moles

According to the stoichiometry of the balanced equation, 1.572 moles of Al should produce:

n(Al2O3) = 2/4 x n(Al) = 0.786 moles of Al2O3

The mass of this amount of Al2O3 is:

m(Al2O3) = n x M = 0.786 x 101.96 = 80.11g

Therefore, the theoretical yield of Al2O3 is 80.11g.

Now, we can calculate the percent yield of Al2O3 using the following formula:

% yield = (actual yield/theoretical yield) x 100%

We are given that 67.3g of Al2O3 is produced, so the actual yield is 67.3g.

% yield = (67.3/80.11) x 100% = 84.0%

Therefore, the percent yield of Al2O3 is 84.0%.

Oxygen is a chemical element with the symbol O and atomic number 8. It is a colorless, odorless, and tasteless gas that makes up about 21% of Earth's atmosphere and is essential for the survival of most organisms.

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Answer:

Iron (III) oxide reacts with carbon monoxide according to the balanced equation: Fe2O3 + 3CO

Answer:

potassium (K) has (220 pm) while Sodium (Na) has (180 pm). The potassium atom has an extra electron shell compared to the sodium atom thus the potassium has a larger atomic radius.

Answer:

Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4

Explanation: Hope this helps

Explanation:

the answer for the above

is b)0.019

A white powdery chemical sedimentary rock that does not react to hydrochloric acid could be chalk or gypsum.

Chalk is a soft, porous form of limestone composed primarily of the mineral calcite (calcium carbonate).

It is commonly used for writing on blackboards or as a dietary supplement. Gypsum, on the other hand, is composed of calcium sulfate dihydrate and is often used in construction materials such as drywall.

When hydrochloric acid is applied to gypsum, there is no significant effervescence or bubbling, indicating the absence of a chemical reaction.

This distinctive property allows geologists and mineralogists to identify gypsum in various geological formations and helps differentiate it from other minerals that may react with acid.

Both chalk and gypsum are relatively soft and can be easily scratched with a fingernail. They do not react with hydrochloric acid, as their main constituent minerals are not soluble in acid.

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Answer:

The synopsis and according to particular circumstances is summed up in the description section below.

Explanation:

It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

Dansylalanine is synthesized by reacting N-dansyl chloride with the amine group of Boc-L-alanine.

The Boc group on compound 1 in the synthesis of Dansylalanine most likely functions to protect the α-amine group of L-alanine from N-dansylation.

The α-amine group of L-alanine is a nucleophilic center that is highly reactive.

It readily reacts with electrophiles such as the N-dansyl group in N-dansyl chloride, which could have led to the formation of unwanted products if left unprotected.

The presence of the Boc group in Boc-L-alanine shields the α-amine group, making it less reactive towards electrophiles.

Therefore, when N-dansyl chloride is added to Boc-L-alanine, it reacts selectively with the carboxylate group, forming a stable amide bond with the α-amine group protected.

Once the reaction is complete, the Boc group can be removed by treating the product with an acid, unmasking the α-amine group and revealing the desired dansylalanine.

The use of the Boc group as a protecting group in peptide synthesis has become prevalent because of its stability and ease of removal.

It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

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Cyanide binds to the electron transport chain and prevents electron transfer to oxygen, preventing NADH from being converted to NAD+. This would imply that no ATP was also produced.

What is Cyanide?

Cyanide is a potentially lethal chemical that can exist in a variety of forms.

Cyanide can exist in the form of a colourless gas, such as hydrogen cyanide (HCN) or cyanogen chloride (CNCl), or as a crystal, such as sodium cyanide (NaCN) or potassium cyanide (KCN).

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What is Electron?

An electron is a negatively charged subatomic particle that can be bound to or free from an atom (not bound). A bound electron is one of the three primary types of particles within an atom, the other two being protons and neutrons.

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Answer:

The answer is B

Explanation:

A pipe to the ground

At room temperature, o-vanillin and p-toluidine react in a liquid eutectic shaped upon grinding , whilst under 10 °C the identical substances seem to react with out the formation of a liquid phase.

The liquid phase maximum possibly stays hidden in the back of stable reactants and response products. When o-vanillin and p-toluidine are blended, the combination turns to a vibrant orange powder because the imine is shaped. At first, the product is an orange soften but, with persisted stirring, bureaucracy a dry orange powder. The o-vanillin grew to become from a inexperienced powder to orange layer because it blended with p-toludine, which became in the beginning a white precipitate.

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Melting ice cream is a physical change because it is a phase change, the water in the ice cream gains thermal energy and the inter-molecular forces are overcome and the molecules move further apart forming a liquid. It is not a chemical change because no chemical reactions occurred.  

Answer:; 66 g is about 3/2 the value of the molar mass of CO2. It is reasonable that the sample contains 3/2 (1.5) mol.

Explanation:

During RNA synthesis, the 3' hydroxyl (also called as the hydroxyl) of the preceding codon is modified by the phosphatase of an incoming sufficient to amount 

Phosphates are necessary for the generation of energy, the operation of muscles and nerves, and the growth of bones. For detecting the phosphate levels in malnourished individuals, ph tests are really quite helpful.

Phosphate is a naturally occurring form of phosphorous, and makes up 25% of all the minerals necessary for plant growth and maintenance. Phosphorous is a common feature in many goods and is necessary for the production of all fertilizers.

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The biome which comprises most of Antarctica is the cold desert or polar desert.

This is defined as an area which is classified according to the species that live there.

The climate of Antarctica is very cold  with very little life forms which is why it is referred to as a cold desert or polar desert.

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Large particles usually get smaller as a result of surface reactions. Both heating and freezing effects of tiny particles on the climate are seen.

Weathering can be classified as either physical or chemical. There is a wide variety in soil particle size due to variations in weathering processes.The overall surface area increases when the size is reduced more. This is significant since most chemical changes start at an object's surface.

The Earth's materials are the four major elements that make up the earth's crust. The earth is made up of minerals, rocks, soil, and water. Earth materials include the necessary building components for life, agriculture, and industry.

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Answer:

Power = 1011.2 Watts

Explanation:

Given the following data;

Voltage = 128 Volts

Current = 7.9 Amperes

To find the power rating;

Mathematically, the power rating of an electrical device is given by the formula;

Power = current * voltage

Power = 128 * 7.9

Power = 1011.2 Watts

Answer:

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue ) the water passes through the filter paper (it becomes the filtrate )

Explanation:

Answer:

Describe the best method for separating a mixture of sand, salt, and steel shavings by placing the steps below in the correct order.

⇒ 4 Heat the mixture to evaporate the water.

⇒ 3 Pour the mixture through a filter to separate the sand.

⇒ 1 Pass a magnet over the mixture to remove the steel.

⇒ 2 Add water to the sand/salt mixture and stir to dissolve the salt.

In one of the trials, the purpose of using water/soap solution was to compare the cleanliness of the hand with washing by water alone.

Hand washing is one of the simplest, most effective ways to avoid getting sick and prevent the spread of germs. Washing your hands with soap and water is still one of the most important steps you can take to avoid getting sick and to avoid spreading germs to others. The purpose of using water/soap solution for one of the trials was to compare the cleanliness of the hand with washing by water alone.The experiment involves two trials to investigate the effectiveness of soap and water in removing bacteria from hands. In one trial, the participant washed their hands with soap and water. While in the other trial, the participant washed their hands with water alone. After washing, their hands were pressed on a petri dish with culture medium to grow the bacteria. Then, the plates were placed in an incubator at 37°C for two days to grow bacteria. The soap and water solution are effective in removing bacteria from hands because the soap helps to lift dirt, grease, and microbes off skin and onto the surfaces of the lather, so that it can be rinsed away by water.

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For the given reaction, decreasing the volume made to the system at equilibrium will result in a net reaction to the right to form more product. Option A is correct.

It is important to mention that when the reaction has reached a stage at which the rates of forward and backward reactions are equal, it is said to be in equilibrium. In this case, both the forward and backward reactions are taking place simultaneously at an equal rate.

According to the Le Chatelier's principle, if a chemical system in equilibrium is subjected to a change in conditions, the equilibrium will shift in the direction that tends to restore the original conditions.

The pressure of a gas is directly proportional to the volume of the container. As a result, decreasing the volume of the container will raise the pressure of the gas. The system will attempt to alleviate the stress by reacting in such a way that the number of moles of gas is decreased.

The reaction shifts to the side with fewer moles of gas.In this situation, the product CH4(g) is a gas, while both C(s) and H2(g) are solids and gases, respectively. The net reaction will be shifted to the right, resulting in the formation of more CH4(g).

Therefore, the correct answer is option A.

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Answer:

3H2 + N2 ---> 2NH3

Explanation:

If 8 moles of HBr react, 323.76 g of Al will react. If 40.1 g of KClO3 react, 11.9 L of O2 will be produced.

From the balanced chemical equation, we can see that for every 2 moles of HBr that react, 3 moles of Al will react.

So, if 8 moles of HBr react, then 3/2 x 8 = 12 moles of Al will react.

To convert moles of Al to grams, we use the molar mass of Al, which is 26.98 g/mol. So, 12 moles of Al would weigh 12 x 26.98 = 323.76 g.

Therefore, if 8 moles of HBr react, 323.76 g of Al will react.
From the balanced chemical equation, we can see that for every 2 moles of KClO3 that react, 3 moles of O2 will be produced.

First, we need to determine how many moles of KClO3 have reacted:

40.1 g of KClO3 corresponds to 40.1 g / (122.55 g/mol) = 0.327 moles of KClO3.

So, if 0.327 moles of KClO3 react, then 3/2 x 0.327 = 0.491 moles of O2 will be produced.

To convert moles of O2 to liters, we use the ideal gas law: PV = nRT. We can assume that the reaction takes place at standard temperature (273 K) and pressure (1 atm), and we can use the molar volume of any gas at standard conditions, which is 24.45 L/mol.

So, 0.491 moles of O2 would occupy a volume of 0.491 moles * 24.45 L/mol = 11.9 L.

Therefore, if 40.1 g of KClO3 react, 11.9 L of O2 will be produced.

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The ratio in whole numbers of the masses of carbon that combine with 1.00 g of oxygen between the two compounds is 3:1.

To determine the ratio in whole numbers of the masses of carbon that combine with 1.00 g of oxygen, we need to look at the ratios of their atomic masses.

The atomic mass of carbon (C) is approximately 12.01 g/mol, and the atomic mass of oxygen (O) is approximately 16.00 g/mol.

To find the ratio of their masses, we can divide the atomic masses:

Mass ratio = Atomic mass of carbon / Atomic mass of oxygen

Mass ratio = 12.01 g/mol / 16.00 g/mol

Mass ratio = 0.75125

The ratio obtained, 0.75125, is not a whole number. However, we can approximate it to a whole number ratio by multiplying it by a common factor to eliminate the decimal.

In this case, multiplying the ratio by 4 yields:

Approximate whole number ratio = 4 * 0.75125 ≈ 3

Therefore, the approximate whole number ratio of the masses of carbon that combine with 1.00 g of oxygen is 3:1.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The theoretical yield of sodium chloride for the reaction of 55.0 g Na with 67.2 g Cl2 is 141 g.

The theoretical yield of a chemical reaction refers to the maximum quantity of product that may be obtained by reacting specified quantities of reactants. The theoretical yield is determined using stoichiometry. The amount of product that is really obtained from a reaction is called the actual yield.

Theoretical yield is computed using stoichiometry by calculating the number of moles of each reactant involved in the reaction and then converting these values to the mass of the final product using the stoichiometry coefficients. The number of moles can be calculated using the molecular weight of each substance.

Let us calculate the theoretical yield of NaCl using the given data,55.0 g Na + 67.2 g Cl2 (balanced equation)

Now we calculate the moles of each substance using their respective molecular weights Na (sodium) molecular weight = 22.9898 g/mole
Moles of Na = 55.0 g / 22.9898 g/mole = 2.39 molesCl2 (chlorine)

molecular weight = 35.45 g/mole

Moles of Cl2 = 67.2 g / 35.45 g/mole = 1.90 moles

according to the balanced equation:2 Na + Cl2 → 2 NaCl

From the balanced equation, the mole ratio of Na and Cl2 is 2:1. Thus, Cl2 is the limiting reagent.

This implies that all of the 1.90 moles of Cl2 will be consumed, while only 2 x 1.90 = 3.80 moles of Na are necessary. The mass of NaCl can now be calculated using the mole ratio and the molecular weight of NaCl.

The molecular weight of NaCl = 58.44 g/mole

Theoretical yield = moles of NaCl x molecular weight of NaCl= 1.90 moles x 58.44 g/mole= 111.036 g≈ 141 g (to the nearest whole number)

Therefore, the theoretical yield of sodium chloride for the reaction of 55.0 g Na with 67.2 g Cl2 is 141 g.

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The pH of the given buffer solution, containing 0.200 M NH₃ and 0.300 M NH₄Cl with a Kb value of 1.80 × 10⁻⁵, is approximately 9.07.

A buffer solution is composed of a weak acid and its conjugate base (or a weak base and its conjugate acid) and resists changes in pH when small amounts of acid or base are added. In this case, NH₃ acts as a weak base and NH₄Cl acts as the conjugate acid. To determine the pH of the buffer solution, we need to consider the equilibrium between NH₃ and NH₄⁺ ions. NH₃ reacts with water to form NH₄⁺ and OH⁻ ions through the following equilibrium: NH₃ + H₂O ⇌ NH₄⁺ + OH⁻

The Kb expression for this equilibrium is: Kb = [NH₄⁺][OH⁻] / [NH₃]

Given that the Kb of ammonia (NH₃) is 1.80 × 10⁻⁵, we can set up an ICE (Initial, Change, Equilibrium) table to calculate the concentrations of NH₃, NH₄⁺, and OH⁻ ions.

Let x be the concentration of OH⁻ ions (which is equal to [NH₄⁺]), then the concentration of NH₃ will be (0.200 - x) M.

Using the Kb expression and the ICE table, we can set up the equation:

Kb = (x)(x) / (0.200 - x)

Solving this equation yields x = 1.20 × 10⁻⁵ M, which represents the concentration of OH⁻ ions.

To calculate the pOH of the solution, we can use the equation:

pOH = -log10[OH⁻] = -log10(1.20 × 10⁻⁵) ≈ 4.92

Finally, we can determine the pH of the solution by subtracting the pOH from 14 (pH + pOH = 14): pH = 14 - 4.92 ≈ 9.07

Therefore, the pH of the buffer solution is approximately 9.07.

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Answer:

8

Explanation:

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus

Answer:

2 aluminum reacts with sulfuric acid