calculate the standard cell potential at 25 ∘c for mg(s) fe2 (aq)→mg2 (aq) fe(s) express your answer to three significant figures and include the appropriate units.

Answer: greater, stronger

Explanation: Bonds that form as a result of sharing their electrons are called covalent bonds. A lot of energy is contained in those bonds, especially if they are higher order. A single bons is bond order 1, A triple bond is bond order 3. An example of a triple bond is acetylene. It combusts with a very hot flame when it's triple bond is broken with oxygen.

Answer:

evaporation occurs when heat from the sun beams down onto a water source and it turns the water into vapor. If you further explain it, the water vapor will then clump together into clouds. The clouds will then become heavy and release water back to the ground.

Explanation:

The second step in the Gram staining procedure involves the flooding of the slide for the one minute is with iodine . The correct option is B. iodine.

There are the four fundamental steps in the Gram stain process , the first is to apply a base color that is the crystal violet. In second step  adding the Gram's iodine as the mordant. In the third step, the Rapid decolorization with the acetone, the ethanol, or the combination of the two and in the four step,  Using the safranin as the counterstain.

Thus, the iodine will be used in the second step in the Gram staining process that involves the flooding in the slide for one minute.

To learn more about gram stain here

https://brainly.com/question/12255227

#SPJ4

the use of NaOH solution in extraction procedures can help to adjust the pH of the solution, enhance the solubility of organic compounds in the aqueous layer, and help to separate different compounds based on their relative solubilities.

NaOH (sodium hydroxide) solution is often used in extraction procedures to adjust the pH of the solution and to make the organic compounds more soluble in the aqueous layer.

When an organic compound is mixed with water, it may dissolve partially or not at all due to differences in polarity between the two substances. By adjusting the pH of the solution with NaOH, the organic compounds can become more soluble in the aqueous layer because the addition of a basic solution can convert acidic functional groups in the organic compound to their conjugate bases. For example, carboxylic acids (an acidic functional group commonly found in organic compounds) can be converted to their water-soluble carboxylate salt forms by the addition of a basic solution such as NaOH.

Learn more about ph here:

https://brainly.com/question/26856926

#SPJ4

The only situation where there is an increase in entropy;

The term entropy has to do with the degree of disorder in a system. Thus we must recall that gases tend to move very freely and the the gas does not have a particular or a fixed shape or volume. Hence, the level of the disorderliness would increase so much when a gas is produced.

The entropy is least when we have a solid because the particles that compose a solid are all held together in such a way that the particles do not move about freely in the system.

Thus, when there is an isothermal compression of the gas, the molecules of the gas collide more frequently with each other and entropy increases.

When a gas expands, it spreads out and entropy is reduced. When a glass of water looses energy, the molecules of the water would decrease in speed and entropy is reduced.

Learn more about entropy:https://brainly.com/question/13146879

#SPJ1

If you had added 50 mL of water to a sample of KHP instead of 30 mL, the titration of that sample would have required more amount of base. This is because the addition of water would have diluted the KHP sample, reducing its concentration.

The concentration of a solution is defined as the amount of solute (in this case, KHP) present in a given volume of solution. When you dilute a solution, you increase the volume of the solvent (in this case, water), but the amount of solute remains the same. Therefore, the concentration of the solution decreases.

During titration, you add a solution of known concentration (the titrant) to a solution of unknown concentration until a chemical reaction is complete. The point at which the reaction is complete is called the equivalence point. At this point, the amount of titrant added is stoichiometrically equivalent to the amount of the substance being titrated. In the case of KHP, the chemical reaction that occurs during titration is:

KHP + NaOH → NaKP + H2O

Here, NaOH is the titrant and KHP is the substance being titrated. The amount of NaOH required to reach the equivalence point depends on the concentration of KHP. If the KHP sample is more diluted (i.e., if more water is added), it will require more NaOH to reach the equivalence point because there is less KHP per unit volume of the solution. Conversely, if the KHP sample is less diluted, it will require less NaOH to reach the equivalence point because there is more KHP per unit volume of the solution.

To know more about KHP Sample visit:

https://brainly.com/question/31212987

#SPJ11

B. 2Na:Cl2

2 moles of sodium react with 1 mole of chlorine to generate 2 moles of sodium chloride.

5 moles of sodium will react with 2/51 =2.5 moles of chlorine to form 5.0 moles of NaCl.

Because 3.0 moles of chlorine are present, chlorine is an excess reagent.

As a result, the Cl is the oxidising agent since it pushed the 2I to lose one electron while also gaining two electrons. 2I is the reducing agent.

Sodium is in the 0 oxidation state on the LHS and changes to +1 in the product, therefore it is oxidised. Hydrogen was +1 on the reactant side and goes to 0 oxidation state on the RHS, hence it is reduced.

learn more about oxidising agent

https://brainly.com/question/14041413

#SPJ1

I think zinc is not used into inverstiagte with hydrogen gas because it is non-porous in nature which causes it to have a slow reaction

Explanation:

Because Zinc is more reactive than Hydrogen

Answer:

The water freezes and becomes solid ice

Answer:

See below

Explanation:

Water freezes at 0 C

  so the water will give up heat to become 0 C  water

     then it will give up more heat to become  0 C   ice

          then it will give up even more heat to become  -10 C ice

The mass of the P4 that is reacted is 37.2 g

Stoichiometry works by using a balanced chemical equation to determine the mole ratio between reactants and products. This mole ratio is then used to convert the amount of one substance into the amount of another substance, using the mole concept and molar mass.

Using

PV = nRT

n = PV/RT

n = 1 * 39.6/0.082 * 298

n = 1.6 moles

From the reaction equation;

P4 + 6Cl2 → 4PCl3

1 mole of P4 reacts with 6 moles of Cl2

x moles of P4 reacts with 1.6 moles of Cl2

x = 1.6 * 1/6

= 0.3 moles

Mass of P4 = 0.3 * 124 g/mol

= 37.2 g

Learn more about stoichiometry:https://brainly.com/question/30215297

#SPJ1

when (r)-butan-2-ol is treated with tscl in pyridine, the product formed is the single enantiomer.

When the (r)-butan-2-ol is treated with tscl in pyridine, the product formed is the single enantiomer. the single enantiomer are also called as the single isomers or the stereoisomers.  the enantiomers are the pair of the molecules or compound that will exist in the two forms that are the mirror image of the each other but they are not superimposable mirror to each other. the images which are the superimposable mirror image to each other is called as achiral compound.

Thus, a single enantiomer is formed as the product when the  (r)-butan-2-ol is treated with tscl in pyridine.

To learn more about single enantiomer here

https://brainly.com/question/29853533

#SPJ4

The molecular formula of a molecule with an empirical formula of CH₂0 and a molar mass of 120.12 is C₆H₁₂O₆.

To calculate the molecular formula of a compound, we need to know its empirical formula and molecular weight. Here, the empirical formula of the molecule is given as CH₂0, and the molar mass is 120.12 g/mol. To determine the molecular formula, we must first find the empirical formula's molecular weight. In this situation, the empirical formula CH₂0 has a molecular weight of 30 g/mol.

We can now calculate the number of empirical formula units in the compound: 120.12 g/mol ÷ 30 g/mol = 4. We have four empirical units in the molecule. The empirical formula unit contains one carbon, two hydrogen, and one oxygen atoms. So, the compound's molecular formula will contain four times as many atoms as the empirical formula unit. Carbon: 4 x 1 = 4 Hydrogen: 4 x 2 = 8 Oxygen: 4 x 1 = 4. Thus, the molecular formula of the molecule is C₆H₁₂O₆.

Learn more about empirical formula here:

https://brainly.com/question/14044066

#SPJ11

Answer:

20L

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 10L

Initial Temperature (T1) = stp = 273K

Final temperature (T2) = 546K

Final volume (V2) =..?

The new volume of the gas can be obtained by using the Charles' law equation as shown below:

V1/T1 = V2/T2

10/273 = V2/546

Cross multiply to express in linear form

273 x V2 = 10 x 546

Divide both side by 273

V2 = (10 x 546) / 273

V2 = 20L

Therefore, the new volume of the gas is 20L.

The mass of 0.5 mole of the element is approximately 6.025 grams.

To calculate the mass of 0.5 mole of the element, we need to know the molar mass of the element.

Given that the mass of 2 x 10^21 atoms of the element is 0.4 grams, we can use this information to find the molar mass.

The number of atoms in 1 mole of any substance is given by Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

First, we calculate the molar mass of the element using the given information:

Molar mass = Mass of 2 x 10^21 atoms / Number of moles of 2 x 10^21 atoms

Molar mass = 0.4 g / (2 x 10^21 atoms / (6.022 x 10^23 atoms/mol))

Molar mass ≈ 0.4 g / (3.32 x 10^-2 mol)

Molar mass ≈ 12.05 g/mol

Now that we know the molar mass of the element is approximately 12.05 g/mol, we can calculate the mass of 0.5 mole of the element:

Mass = Molar mass x Number of moles

Mass = 12.05 g/mol x 0.5 mol

Mass = 6.025 grams

for more such questions on element

https://brainly.com/question/28376204

#SPJ8

Answer:

okey if I'm going on south America for the winter break i would basically pack baggy clothes ,sweater,jackets,wollen hats,wollen clothes,socks,shoes,scarf,heavy and wollen one thats all ig

Skin color is determined by the presence and amount of a pigment called melanin. Melanin is produced by specialized skin cells called melanocytes and is responsible for the color of our skin, hair, and eyes.

The amount of melanin in the skin varies between individuals and is determined by genetic factors, as well as environmental factors such as exposure to the sun.

Melanin acts as a natural sunscreen, protecting the skin from harmful UV rays. People with darker skin have more melanin, which means they are less likely to get sunburned or develop skin cancer. However, everyone needs to protect their skin from the sun, regardless of their skin color.

Certain medical conditions can affect the production of melanin, resulting in skin pigmentation disorders such as vitiligo, albinism, and hyperpigmentation. These conditions can cause patches of skin to become lighter or darker than the surrounding skin.

melanin is the pigment responsible for skin color and is produced by melanocytes. The amount of melanin in the skin is determined by genetic and environmental factors and plays an important role in protecting the skin from UV damage.

To know more about  melanin  visit:

brainly.com/question/13019458

#SPJ11

Answer:

the red line

Explanation:

The bubbles in the bread is caused by the evolution of carbon dioxide by the action of yeast. If there are no bubbles formed inside the bread which means, the yeast did not produce the carbon dioxide needed for the bread to rise.

Fermentation is the process of conversion of sugar molecule into other substance b the action of microbes such as yeast. In cellular respiration the glucose molecule is converting to carbon dioxide and water. Where as, in fermentation, the glucose is converting to carbon dioxide and ethanol.

The balanced chemical equation of the breaking of glucose into carbon dioxide and water is written as follows:

\(\rm C_{6}H_{12}O_{6} \rightarrow 2CO_{2} + 2C_{2}H_{5}OH.\)

According to this reaction, one mole of glucose molecule gives 2 moles of carbon dioxide and 2 moles of ethanol. Hence, if the bread do not rise the bubbles, the yeast does not producing CO₂.

Find more on fermentation :

brainly.com/question/14525128

#SPJ1

193 grams of NaCl are needed to make 1.50 L of a 2.20-M NaCl solution.

Calculation of the mass of NaCl required:

The only thing we need to know is that a solution's molarity informs us of the exact amount of moles of solute that are contained in 1 L of a solution.

In this situation, a NaCl (sodium chloride) solution with a 2.20-M concentration will have 2.20 moles of the solute (sodium chloride) in every 1 L of the solution.

The solution's molarity of 2.20 M requires that every 1 L of this solution include 2.20 moles of sodium chloride, which implies that every 1.50 L of this solution needs to contain

\(1.5 L solution .\frac{2.20 moles NaCl}{1L solution} = 3.30 moles NaCl\)

Utilize the compound's molar mass to translate the amount of NaCl (sodium chloride) in moles to grams.

\(3.30 moles NaCl . \frac{58.4 gm}{1 mole NaCl} = 192.7 gm\) ≈ 193 gm

Therefore it is concluded that the final answer is 193 gm.

Learn more about NaCl here:

https://brainly.com/question/18248731

#SPJ1

The molarity of NaClO in the bleach is 0.101 M (mol/L).

Molarity (M) is the number of moles of solute per liter of solution.

It is calculated by dividing the number of moles of solute by the volume of the solution in liters.

To find the molarity of NaClO in the bleach, we need to use the following information given in the question:

1L of bleach has a mass of 1,100 grams7.25% of the mass of bleach is NaClO1 mol of NaClO has a mass of 74.44 gramsTo begin the calculation, we need to determine the mass of NaClO in 1L of bleach.

To do this, we can use the fact that 7.25% of the mass of bleach is NaClO:Mass of NaClO in 1L of bleach = 0.0725 x 1,100 g = 79.75 g

Next, we can convert this mass of NaClO to moles using its molar mass:

moles of NaClO = 79.75 g / 74.44 g/mol = 1.07 mol.

Finally, we can use the formula for molarity to calculate the molarity of NaClO in the bleach:

Molarity = moles of solute / volume of solution in litersMolarity = 1.07 mol / 10 L = 0.107 M (mol/L)We can round this answer to three significant figures to get the final answer of 0.101 M (mol/L).

For more such questions on molarity

https://brainly.com/question/17138838

#SPJ8

Answer:

No.

Leftmost: Rick shouldn't be smelling any vapors; if required he should be using the wafting technique instead of putting it close to his face. Additionally, He's not wearing gloves nor a lab coat.

Middle: Sarah is not wearing any goggles nor a lab coat and she's at risk as she's pouring two different liquids into a solution at the same time which may pose a hazard of sudden irritation, exposure, heat or combustion.

Rightmost: Andrew is drinking a chemical of supposedly unknown origin putting him at risk by ingestion all the while lacking all of the requisite Personal Protective Equipment.

All of them are also at fault for leaving and not containing a chemical spill off to the side (rightmost), and by the looks of it, enter and operate the lab without their supervisor/professor present.

Explanation:

basta may sagot, sis

Answer: is a pure substance

Explanation:

The absorbance of a solution depends on the concentration of the solution, the path length of the light through the solution, and the molar absorptivity of the compound at the given wavelength.

The equation for absorbance is A = εlc, where A is the absorbance, ε is the molar absorptivity, l is the path length, and c is the concentration of the solution.

In this case, we know the path length (0.01mm) but we do not know the molar absorptivity or the concentration of the solution. Therefore, we cannot calculate the theoretical absorbance of the solution.

In order to determine the theoretical absorbance of the solution, you would need to either know the molar absorptivity of tetraguaiacla at 500 nm or be able to measure the absorbance of a known concentration of the solution at 500 nm and use that to calculate the molar absorptivity.

Once you have the molar absorptivity, you can use the equation A = εlc to calculate the theoretical absorbance of the 0.01mm solution.

To know more about molar absorptivity click on below link:

https://brainly.com/question/29439014#

#SPJ11

Answer:

The word that best characterizes the Pardoner in this passage is hypocritical.

Explanation:

The Pardoner is against avarice, but as it turns out, he himself commits this sin.

If the atom in Drawing B had been removed by physical separation from one of the substances in Model 1, the substance that could have been the source of the atom in Drawing B is an element.

An atom is the smallest part of a substance that can take part in a chemical reaction. We know that elements are composed of atoms. The atoms of an element are discretely arranged. Thus, in an element, there are so many atoms of the substance.

In the image that has been shown in the question, the source of the atom as it has been show is an element. Thus, if the atom in Drawing B had been removed by physical separation from one of the substances in Model 1, the substance that could have been the source of the atom in Drawing B is an element.

Learn more about element:https://brainly.com/question/13794764

#SPJ1

(a) The melting of ice cubes at 10°C and 1 atm pressure, (c) alignment of iron filings in a magnetic field, and (d) the reaction of sodium metal with chlorine gas to form sodium chloride are spontaneous processes.

(a) The melting of ice cubes at 10°C and 1 atm pressure is a spontaneous process because it occurs naturally without any external influence. As the temperature increases, the ice gains energy, and the intermolecular forces holding the solid together weaken. This allows the ice molecules to overcome the forces and transition into the liquid state.

(b) The separation of a mixture of N₂ and O₂ into pure N₂ and pure O₂ samples is not a spontaneous process. It requires external energy input, such as fractional distillation or selective adsorption, to achieve the separation. The gases do not naturally separate on their own.

(c) The alignment of iron filings in a magnetic field is a spontaneous process. Iron filings are composed of small magnetic domains with randomly oriented magnetic moments. When exposed to a magnetic field, the field exerts a torque on the magnetic moments, aligning them in the same direction as the field. This alignment occurs spontaneously without any external intervention.

(d) The reaction of sodium metal with chlorine gas to form sodium chloride is a spontaneous process. Sodium has a strong tendency to lose an electron, while chlorine has a strong tendency to gain an electron. When sodium and chlorine come into contact, a chemical reaction takes place spontaneously, resulting in the formation of sodium chloride.

(e) The dissolution of HCl(g) in water to form concentrated hydrochloric acid is not a spontaneous process. It requires the input of energy, typically in the form of heat, to break the intermolecular forces between HCl molecules and enable their dispersion in water.

To know more about intermolecular forces refer here:

https://brainly.com/question/31797315#

#SPJ11

It is hemoglobin.

In the red blood cells (erythrocytes) of vertebrates, hemoglobin, an iron-containing protein, transports oxygen from the lungs to the body's tissues and organs and returns carbon dioxide to the lungs. In a complete blood cell (CBC) test, the amount of hemoglobin in the blood is often measured.

A globin group is surrounded by four heme groups, which together form a tetrahedral shape in each hemoglobin molecule. Heme is an organic complex known as a porphyrin that has an iron atom linked to it. Heme makes up only 4% of the weight of the molecule. As the blood circulates between the lungs and the tissues, the iron atom is what holds oxygen in place. Each hemoglobin molecule contains four iron atoms, and as a result, it has the capacity to bind four oxygen molecules. Two linked pairs of polypeptide chains make up globin.

Learn more about hemoglobin here:

https://brainly.com/question/12681891

#SPJ4

Answer:

volume = mass/ densidad

0.88g/cm3 = 880kg/m3

v=20kg/880kg/m3

v=0.02272727272

o puede ser 0.0227

o tambien puede ser 0.023