what is the mole fraction of i2 in a solution made by dissolving 111 g of i2 in 245 g of hexane, c6h14?

1.0 mole of water molecules has greater mass.

The molar mass of a carbon atom is approximately 12 grams per mole, so 1.0 mole of carbon atoms would have a mass of 12 grams. The molar mass of a water molecule (H2O) is approximately 18 grams per mole, so 1.0 mole of water molecules would have a mass of 18 grams. The molar mass of a hydrogen molecule (H2) is approximately 2 grams per mole, so 2.0 moles of H2 molecules would have a mass of 4 grams. The molar mass of a krypton atom is approximately 83.8 grams per mole, so 0.5 mole of krypton atoms would have a mass of 41.9 grams.

Therefore, the substance with the greatest mass would be 1.0 mole of water molecules, with a mass of 18 grams.

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Answer:

0.5 mole of krypton atoms has the greatest mass among the given quantities.

Explanation:

The molar mass of an element or compound is defined as the mass of one mole of that substance.

The molar mass of carbon (C) is approximately 12.01 g/mol.

Therefore, the mass of 1.0 mole of carbon atoms is:

1.0 mole x 12.01 g/mol = 12.01 g

The molar mass of water (H2O) is approximately 18.02 g/mol.

Therefore, the mass of 1.0 mole of water molecules is:

1.0 mole x 18.02 g/mol = 18.02 g

The molar mass of hydrogen (H2) is approximately 2.02 g/mol.

Therefore, the mass of 2.0 moles of hydrogen molecules is:

2.0 moles x 2.02 g/mol = 4.04 g

The molar mass of krypton (Kr) is approximately 83.80 g/mol.

Therefore, the mass of 0.5 mole of krypton atoms is:

0.5 mole x 83.80 g/mol = 41.90 g

Therefore, the order from greatest to least mass is:

1. 0.5 mole of krypton atoms (41.90 g)

2. 1.0 mole of water molecules (18.02 g)

3. 2.0  moles of hydrogen molecules (4.04 g)

4. 1.0 mole of carbon atoms (12.01 g)

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In yeast, the reaction is eleventh order:Rate = K[ enzyme ] [isocitrate]⁴[AMP]²[NAD⁺]m [Mg²⁺]². The order with respect to NAD⁺ is 2.

The citric acid cycle is also called the Krebs cycle. This is the main source of energy that happens in aerobic conditions.

The coefficient that is raised to the active concentration of the reactants is the order in the mass action law. It is determined experimentally and can be fractional, positive, negative, or zero.

Each reactant's order, which is increased to its power in the rate law, is added to determine the order of the entire reaction.

The overall rate = 11

Rate of overall reaction = 1 + 4 + 2 + m + 2 = 11

9 + m = 11

m = 2

Thus, the order with respect to NAD⁺ is 2.

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The ka for the monoprotic acid which produces a 1.55m solution is 5.37 × 10⁻⁴.

An acid that may donate simplest one proton is known as monoprotic acid, while polyprotic acid can donate multiple proton. In addition, a monoprotic base can be most effective to accept one proton, while a polyprotic base can take delivery of more than one proton.

The key difference among diprotic and monoprotic acid is that monoprotic acids are able to donate one hydrogen atom or proton to their aqueous solution, while diprotic acids are able to donate hydrogen atoms or protons to their aqueous solutions.

Calculation

The value of dissociation constant of acid is given as,

Ka = (0.00295)(0.00295)/0.0162)

Ka = 5.37 × 10⁻⁴

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It should be noted that merthiolate are used for skin antiseptics, vaccines, preservatives in cosmetics and ophthalmic solutions.

Merthiolate is simply a mercury-containing substance that can be used as a germ-killer and preservative in several products.

It should be noted that merthiolate poisoning occurs when large amounts of merthiolate come in contact with the skin of a person. Merthiolate is also used in preventing skin infection and cleaning wounds.

In conclusion, the correct option is merthiolate.

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Answer:

1 mole =56 g

18.5 moles =56×18.5

Answer:

D.4

Explanation:

Number of neutron= mass number - atomic number

where; d no of neutron is 5

d mass no is 9

atomic number be x

5=9-x

x=9-5

x=4

Answer: B 4

Explanation:approved

True, both rRNA (ribosomal RNA) and tRNA (transfer RNA) are involved in mitochondrial protein synthesis, but their origin varies.

Mitochondria, the cellular organelles responsible for energy production, possess their own genetic material known as mitochondrial DNA (mtDNA). This mtDNA encodes for some rRNA and tRNA molecules that are required for protein synthesis within the mitochondria.

However, the majority of proteins needed for mitochondrial function are encoded by nuclear genes and synthesized in the cytoplasm. These proteins are then imported into the mitochondria. Likewise, some rRNA and tRNA molecules are also encoded by nuclear genes, synthesized in the cytoplasm, and imported into the mitochondria to participate in protein synthesis. This process enables the coordination of gene expression between nuclear and mitochondrial genomes to ensure efficient mitochondrial function.

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A girl roller-skating has kinetic energy.

Kinetic energy is the energy of motion. It is the energy possessed by an object due to its movement. In this case, the girl roller-skating has kinetic energy because she is moving.

Potential energy is the energy an object possesses due to its position or configuration. It is the energy an object has stored within it, ready to be released. An object at rest has potential energy because it has the potential to be set in motion and does work.

So, in this case, the girl roller-skating has kinetic energy because she is moving, and not potential energy because she is not at rest.

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There are enzymes that interact with one enantiomer but not the other is incorrect. The interaction of some enzymes with one enantiomer but not the other.

Enzymes are proteins that are capable of lowering the activation energy and speeding up or slowing down a chemical reaction. It means that enzymes do not alter the energy of the reactants and products of the reaction; they only affect the activation energy. The enzymes are not consumed during the reaction in which they are involved, and they remain the same after the reaction.

Therefore, they can be used over and over again to catalyze the same reaction. Enzymes are stereospecific, meaning they can interact with specific stereoisomers of a compound. There are enzymes that interact with one enantiomer but not the other, which is incorrect because enzymes interact with specific enantiomers of a compound. Enzymes are stereospecific, meaning they can interact with specific stereoisomers of a compound.

The incorrect statement about enzymes is option D. There are enzymes that interact with one enantiomer but not the other. Enzymes are not consumed during a reaction, and they are proteins that can speed up or slow down chemical reactions by lowering the activation energy.

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carbon disulfide has Linear planar electron Geometry. sulfur dioxide has trigonal planar electron geometry. hydrocyanic acid has linear planar electron geometry. boron trihydride has trigonal planar electron geometry.

The electron Geometry of the molecule is known as e relative arrangement of the bonded atom. In Triangular planar geometry, a molecule is made up of 3 equally spaced sp2 hybrid orbitals located at 120° angles to each other. Examples are  BF3, BCl3, AlF3 etc.

In Linear Electron geometry, two other atoms are bonded to a central atom placed at a bond angle of 180°. Examples are Carbon dioxide and beryllium hydride BeH2.

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Answer:

I don't wanna intrigue but I think this is how you want things to go. But to make it easier all you have to do is look up "what is genomics" and then simply answer each question should take maybe 5-7 minutes. Just trying to help :)

Answer:

that's a difficult question

Explanation:

Sorry!!!!!

Answer:

72.66g of Fe2O3 are produced.

Explanation:

1st) From the balanced equation we know that 2 moles of Fe2O3 are produced from 4 moles of iron (Fe). With a mathematical rule of three we can calculate the moles of Fe2O3 that will be produced from 0.89 moles of iron:

Now we know that 0.455 moles of Fe2O3 are produced.

2nd) Now we have to convert 0.455 moles of Fe2O3 into grams, by using the molar mass of Fe2O3 (159.7g/mol):

So, 72.66g of Fe2O3 are produced.

Answer: Zelda should place one container of water in sunlight (by a window or outdoors) and the other container in a dark room (closet) away from the sun.

Explanation: This would allow Zelda to test two different settings (sun and no sun) so she can test her hypothesis.

Answer(s):

Atomic model

Bohr's greatest contribution to modern physics was the atomic model. The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons.  

Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element.

The chemical element bohrium (Bh), No. 107 on the periodic table of elements, is named for him.

Liquid droplet theory

Bohr's theoretical work contributed significantly to scientists' understanding of nuclear fission. According to his liquid droplet theory, a liquid drop provides an accurate representation of an atom's nucleus.

This theory was instrumental in the first attempts to split uranium atoms in the 1930s, an important step in the development of the atomic bomb.

Despite his contributions to the U.S. Atomic Energy Project during World War II, Bohr was an outspoken advocate for the peaceful application of atomic physics.

Quantum theory

Bohr's concept of complementarity, which he wrote about in a number of essays between 1933 and 1962, states that an electron can be viewed in two ways, either as a particle or as a wave, but never both at the same time.

This concept, which forms the basis of early quantum theory, also explains that regardless of how one views an electron, all understanding of its properties must be rooted in empirical measurement. Bohr's theory stresses the point that an experiment's results are deeply affected by the measurement tools used to carry them out.

Bohr's contributions to the study of quantum mechanics are forever memorialized at the Institute for Theoretical Physics at Copenhagen University, which he helped found in 1920 and headed until his death in 1962. It has since been renamed the Niels Bohr Institute in his honor.

Explanation:

Niels Bohr was one of the foremost scientists of modern physics, best known for his substantial contributions to quantum theory and his Nobel Prize-winning research on the structure of atoms.

Born in Copenhagen in 1885 to well-educated parents, Bohr became interested in physics at a young age. He studied the subject throughout his undergraduate and graduate years and earned a doctorate in physics in 1911 from Copenhagen University.

While still a student, Bohr won a contest put on by the Academy of Sciences in Copenhagen for his investigation into the measurements of liquid surface tension using oscillating fluid jets. Working in the laboratory of his father (a renowned physiologist), Bohr conducted several experiments and even made his own glass test tubes.  

Bohr went above and beyond the current theory of liquid surface tension by taking into account the viscosity of the water as well as incorporating finite amplitudes rather than infinitesimal ones. He submitted his essay at the last minute, winning first place and a gold medal. He improved upon these ideas and sent them to the Royal Society in London, who published them in the journal Philosophical Transactions of the Royal Society in 1908, according to Nobelprize.org.  

His subsequent work became increasingly theoretical. It was while conducting research for his doctoral thesis on the electron theory of metals that Bohr first came across Max Planck's early quantum theory, which described energy as tiny particles, or quanta.

In 1912, Bohr was working for the Nobel laureate J.J. Thompson in England when he was introduced to Ernest Rutherford, whose discovery of the nucleus and development of an atomic model had earned him a Nobel Prize in chemistry in 1908. Under Rutherford's tutelage, Bohr began studying the properties of atoms.

Bohr held a lectureship in physics at Copenhagen University from 1913 to 1914 and went on to hold a similar position at Victoria University in Manchester from 1914 to 1916. He went back to Copenhagen University in 1916 to become a professor of theoretical physics. In 1920, he was appointed the head of the Institute for Theoretical Physics.

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Answer:

I am pretty sure its called a sand dune

Explanation:

1. Ensure Clear and Visible Placement: Machine controls should be located in a position that is easily accessible, visible, and within reach of the equipment operator. Clear and intuitive labeling or color-coding can also be used to enhance visibility and assist in identifying the controls quickly.

2. Provide Adequate Guarding: The machine controls should be positioned in a manner that minimizes the risk of accidental activation or unintended operation. This can be achieved by incorporating appropriate guarding or barriers around the controls to prevent inadvertent contact or interference.

3. Consider Ergonomics and Operator Comfort: When determining the location of machine controls, it is essential to consider ergonomic principles and operator comfort. Controls should be positioned in a way that allows operators to maintain a comfortable and natural posture while operating the equipment. This can help reduce the risk of operator fatigue, musculoskeletal disorders, and errors due to discomfort or awkward reach.

These rules aim to promote operator safety, minimize the potential for accidents, and ensure efficient and effective control of equipment involving fluid power components.

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The balanced oxidation half equation is given below:

Oxidation reactions are reactions in which the oxidation of the species increases.

Oxidation reactions can involve addition of oxygen or electronegative elements to a substance or the removal of hydrogen or electropositive elements from a substance.

The balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in acidic aqueous solution is given below:

MnO₂ + H₂O → MnO₄⁻ + H⁺ + 3 e⁻

In conclusion, the balanced oxidation half equation shows that three electrons were lost by the manganese (iv) ion to form manganese (vii) ion.

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Answer:

Size of a Nucleus

This nucleus has 3 protons (which gives the nucleus a charge of +3, identifying it as the element Lithium) and 4 neutrons (giving it a total mass number of 7).

Explanation:

"One possibility is that the battle between the virus and your immune system can take as long as two weeks.

It could be the immune system holds the virus at bay,” said Tompkins.

Or, your immune system has to work so hard that after two weeks it’s inflamed and that’s what makes you feel bad.

Answer:

the method is fractional distillation

1) a) The apparatus that can be used to separate a mixture of ethanol and water is called a fractional distillation apparatus. It consists of the following components:

b) The method of separation used in this apparatus is called fractional distillation.

2) In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revalorize.

Distillation flask: This is a round-bottomed flask where the mixture of ethanol and water is initially placed.

Fractionating column: A long column with several glass beads or plates. It provides a large surface area for the vaporized components to condense and revalorize, aiding in the separation process.

Thermometer: It is placed at the top of the fractionating column to monitor the temperature during the distillation process.

Condenser: It is a coiled glass tube connected to the fractionating column. Cold water flows through the condenser, causing the vaporized components to condense back into liquid form.

Receiver flask: This is where the separated components are collected. The receiver flask is placed at the end of the condenser.

b) The method of separation used in this apparatus is called fractional distillation. Fractional distillation is employed when the components of a mixture have similar boiling points. In the case of ethanol and water, they form an azeotropic mixture with a boiling point of around 78.2°C. Simple distillation would not effectively separate these two components because they would boil together and vaporize simultaneously.

In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revaporize. This repeated condensation and revalorization process allows for more efficient separation. The higher surface area in the fractionating column helps to achieve better separation of the ethanol and water, resulting in a more concentrated sample of ethanol in the distillate collected in the receiver flask.

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Answer:

Total energy consumed = 1,882.8 joules

Explanation:

Given:

Calories burned = 450 calories

Find:

Total energy consumed

Computation:

1 calorie = 4.184 joules

So,

450 calories = 4.184 × 450

450 calories = 1,882.8 joules

Total energy consumed = 1,882.8 joules

Answer:

305 seconds

Explanation:

Note that the point at which oxygen changes from liquid to gas is 90k. See the attached graph.

To plot the data, we can use a line graph with temperature (T) on the x-axis and density (d) on the y-axis. Here is a plot of the data:

From the plot, we can see that the density of oxygen decreases as the temperature increases. At around 90 K, there is a significant drop in density, indicating a change in state from liquid to gas. We can circle this temperature as the point at which oxygen changes from liquid to gas.

Therefore, we can circle the temperature 90 K as the point at which oxygen changes from liquid to gas.

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Answer:

ymc+b×3 is the answer to this question

73 grammes of hydrochloric acid and 24.3 grammes of magnesium compound will react.

To calculate the amount of magnesium substance that will react with hydrochloric acid weighing 73 g, we need to know the concentration of the hydrochloric acid and the stoichiometric ratio between magnesium and hydrochloric acid.

Assuming the hydrochloric acid is a standard 1 Molar solution and the stoichiometric ratio is 1:2 between magnesium and hydrochloric acid, the equation for the reaction is:
\(Mg + 2HCl - > MgCl_2 + H_2\)

To calculate the amount of magnesium substance needed, we first need to convert the weight of the hydrochloric acid to moles:
73 g \(HCl\) / (36.5 g/mol \(HCl\)) = 2 moles \(HCl\)

Since the stoichiometric ratio is 1:2 between magnesium and hydrochloric acid, we need half as many moles of magnesium:

2 moles \(HCl\) / 2 = 1 mole \(Mg\)
Finally, we can convert moles of magnesium to grams using its molar mass:

1 mole \(Mg\) * 24.3 g/mol \(Mg\) = 24.3 g \(Mg\)
Therefore, 24.3 grams of magnesium substance will react with 73 grams of hydrochloric acid.

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To the percentage yield for a reaction, you take the actual yield and divide by the theoretical yield and multiply by 100.

Yield also referred to as reaction yield in chemistry, is a measure of the quantity of moles of a product formed in relation to the reactant consumed and expressed as a percentage.

Percent Yield is defined as the actual yield divided by the theoretical yield times 100 i.e.

Percent yield = actual yield/theoretical yield × 100

The percent yield is determined by calculating the ratio of actual yield/theoretical yield.

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Cells be in osmotic equilibrium but chemical and electrical disequilibrium because water moves freely between most cells and the extracellular fluid

When the concentrations are equal on both sides of the membrane called osmotic equilibrium in cell  this results in zero osmotic pressure as there is no force needed to prevent any flow. in other words, the tonicity is the same on both sides of the membrane. by diffusion of water or solutes, osmotic balance ensures that optimal concentrations of electrolytes and non-electrolytes are maintained in cells in this method osmosis maintain equilibrium in the cell not chemical and electrical equilibrium that's why osmotic equilibrium in the cell but chemical and electrical disequilibrium in the cell.

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Answer:

IT MUST BURN!

Explanation:

That is basically how most solids are broken down