Fish-liver oil is a good source of vitamin A, whose concentration is measured spectrometrically at a wavelength of 329 nm.
(a) Suggest a reason for using this wavelength.

When it comes to determining whether a temperature is hot or cold, it's important to consider the context and what the temperature is being compared to. In general, temperatures above 50 degrees Celsius (122 degrees Fahrenheit) are considered to be hot, while temperatures below 0 degrees Celsius (32 degrees Fahrenheit) are considered to be cold.

However, it's important to note that 50 degrees Celsius (122 degrees Fahrenheit) is considered to be a very high temperature. This temperature is above the average body temperature of 37 degrees Celsius (98.6 degrees Fahrenheit) and it can cause heat-related illnesses if exposed to it for prolonged periods.

For more such questions on Celsius:

https://brainly.com/question/11524365#

#SPJ11

Assume at the end of step b in “The Copper Cycle” experiment, we had only solid product b and water. Considering the reactions after that, the ions present in the water before the rinsing and decanting are: copper (II) ions and hydroxide ions.

The copper cycle experiment aims to perform a series of reactions that regenerate elemental copper at the end of the copper cycle. In this cycle, the reaction series includes single replacement, double replacement, synthesis, and decomposition reactions.

In step b, the ions that exist in the water are copper (II) and hydroxide ions which are stated as: [Cu(H2O)6]2+(aq) + 2OH- --> Cu(OH)2(s) + 6H2O(l).

Learn more about the molarity of copper here https://brainly.com/question/13897172

#SPJ4

Answer:

12.01 grams per mole

Explanation:

theres no sample or example so if theres grams of Carbon, convert it to moles using 12.01g/mol

Answer:

A.length of its lifecycle

Explanation:

A star will go through evolutionary stages depending on their initial mass. These stages are determined by the internal structure of the star and how it produces energy. Therefore, scientists may use the HR diagram to determine the length of the stars lifecycle depending upon its initial mass.

The molar concentration of Al(OH)₃ in the solution is 1.61 M.

we need to calculate the number of moles of Al(OH)3 in the solution:

Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3

Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)

Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol

Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles

Next, we need to calculate the volume of the solution in liters:

Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L

Finally, we can calculate the molar concentration of Al(OH)₃

Molarity = moles of solute/volume of solution in liters

Molarity = 0.804 moles / 0.500 L = 1.61 M

Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.

learn more about Molar Mass here

https://brainly.com/question/837939

#SPJ1

The volume of the gas initially at STP is 23.062L.

The volume of a gas can be calculated using the combined gas law equation as follows;

PaVa/Ta = PbVb/Tb

Where;

According to this question, a gas initially at STP now has a pressure of 12.03atm and a temperature of 2,967.88K.

1 × 25.49/273 = 12.03 × Vb/2,967.88

0.0934 = 0.00405Vb

Vb = 23.062L

Learn more about combined gas law at: https://brainly.com/question/30458409

#SPJ1

Answer:

Quantitative data refers to any information that can be quantified, counted or measured, and given a numerical value. Qualitative data is descriptive in nature, expressed in terms of language rather than numerical values

Explanation:

:)

Answer:

chưa hiểu đáp ánkia cho lắm. Nhưng đáp án là ZnO nha

Explanation:

Answer:Protons are positively charged is the correct statement about an atom

I've also corrected the other statements

Atoms contain protons and neutrons in their nucleus

Neutrons posses no charge and are neutral

The nucleon number is the total number of protons and neutrons in a nucleus

When using the liquid-based method for the collection of a specimen for a pap test, cells are suspended in a bottle of preservative by rinsing the broom in the specimen vial.

What is a pap test?

A Pap test, commonly known as a Pap smear, is a procedure a doctor uses to check for cervical cancer in female patients. Additionally, it may show alterations in your cervical cells that could later develop into cancer.

To detect alterations in cervical cells before they progress to malignancy, a pap smear is performed. The best chance of beating cancer is to discover it as soon as possible. If you don't, early detection of cell alterations can aid in preventing cancer.

Thus, by washing the broom in the specimen vial during the liquid-based method of collecting a specimen for a Pap test, cells are suspended in a bottle of preservative. Cells are immediately deposited on a microscope slide while using the direct smear method to obtain specimens for a Pap test.

To learn more about pap test from the given link below,

https://brainly.com/question/1170220

#SPJ4

Answer:

they are funny and unite.

Thank You

The correct answer is D

Explanation:

Wave frequency is mainly determined by the number of waves that pass through a specific point. In a diagram, this can be found by analyzing the number of crests (top of the wave) and the space between them. For example, wave B is the one with the lowest frequency because there is only one crest and this shows only one wave passing at a specific point. On the opposite, wave D is the one with the highest frequency because this shows multiple crests and this indicates the frequency is high or that many waves pass through a specific point in a short time.

The diagram which shows a wave with the highest frequency is: D.

What is a wave?

A wave can be defined as a disturbance created in a medium, which progressively transports energy from a source to another location without the transportation of matter.

Some of the parameters that are associated with a wave include the following:

The frequency of a wave can be defined as the number of waves that moves through a fixed point per unit time. Thus, a wave frequency is highly dependent on the number times a wave passes through a fixed point and the number of crest formed per unit time..

From the diagram in the image attached, wave D has the highest frequency because it moved through a fixed point in larger amount of times and has more crest in comparison with the other waveforms.

Find more information on wave here: https://brainly.com/question/23460034

Answer:

A mole in chemistry is defined as the number or quantity of a chemical substance that consists of as many fundamental entities such as atoms, molecules, and ions. Therefore, the statement that best describes a mole is that, it is used for directly comparing the amounts of substances.

Explanation:

I found this hope it helps!! (read and try your best)

Th statement which describes a way in which moles is useful is that it can be used to keep track of chemical amounts.

Mole is unit to calculate the amount of chemical substances and it is represented as:
n = W/M, where

W = given mass

M = molar mass

It can be useful in chemical reactions to calculate the relative amount of species present before and after the reaction. In one mole of substance 6.022 × 10²³ atoms of that substance is present.

Hence, option (A) is correct.

To know more about Mole, visit the below link:
https://brainly.com/question/1464305

Answer And Explanation:

An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms.

The molecular basis for the correlation between disulfide bond content and mechanical properties of the protein comparison of a-keratin and glutenin is the presence and amount of disulfide bonds in these proteins.

The presence and amount of disulfide bonds in these proteins directly correlate with their mechanical properties. The more disulfide bonds present, the stronger and more stable the protein will be. This is why keratin and glutenin, both with high disulfide bond content, have strong mechanical properties. In contrast, proteins with low disulfide bond content, such as silk, have weaker mechanical properties.

learn about disulfide bond and their relation with protein structure

https://brainly.com/question/14446616

#SPJ11

Answer:

C3H4O6

Explanation:

See the attached table.  Since we have the masses of each element, we can calculate the moles of each, by dividing by that element's molar mass (grams/mole).  The moles of each are shown on the table.  They are not in whole ratio values, but if we multiply each by 1.36 we obtain whole numbers, which would be the ratio of each element in the formula.

    Atoms

C      3

H      4

O      6

The empirical formula is C3H4O6

Possibly Dihydroxymalonic acid

Answer:

It's made up of one carbon atom and two oxygen atoms.

Explanation:

Answer:

5mL

Explanation:

mass divided by density is equal to volume so

3.9/.78 = 5

why does this work?

grams cancel when you divide g/g/mL and you are left with just mL

Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T

he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:

First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.

To know more about Gibbs free energy visit

https://brainly.com/question/13795204

#SPJ11

Answer:

hey kunal why arent you talking and also the answer is c \

Explanation:

A charged particle is a particle with an electric charge. It may be an ion, a molecule or atom. A neutral particle is striking a positive particle, breaking it into more neutral and positive particles describes the charges of the particles involved. The correct option is A.

The matter can be defined as any material with mass and occupies a space. The smallest unit of the matter is called the atom. In matter the charged particles or subatomic particles are negatively charged electrons, positively charged protons and neutral neutrons.

In the process nuclear fusion, the two lighter nuclei fuse together to form a heavier nucleus with the simultaneous release of huge amount of energy. One of the nuclei may be the proton.

When a charged particles interact with the matter, it will split the matter to generate some charged particles and another stable neutral particle.

Thus the correct option is C.

To know more about charged particles, visit;

https://brainly.com/question/12531313

#SPJ3

Answer:

sorry I just need points

Less evaporation means that less of the sun's energy is used to convert water into water vapor, and more of it is used to heat up the surface. In urban areas, there is typically less vegetation and more impervious surfaces (such as concrete and asphalt), which reduces the amount of water that can evaporate.

This means that more of the sun's energy is absorbed by the surface, leading to higher temperatures. Additionally, buildings and other structures in urban areas can trap heat and prevent it from dissipating, further contributing to the urban heat island effect.

In rural areas, vegetation and soil moisture play an important role in regulating temperature through a process called evapotranspiration. Evapotranspiration is the combined process of water evaporation from the soil and plant transpiration. It helps to cool the air by removing heat from the surface through the transfer of water from the surface to the atmosphere.

In contrast, urban areas have a significant amount of impervious surfaces like concrete, asphalt, and buildings, which reduce the amount of vegetation and soil moisture. As a result, urban areas have less evapotranspiration, which means less cooling effect from the evaporation of water. This leads to a higher surface temperature in urban areas.

Furthermore, urban areas have a higher proportion of dark-colored surfaces, such as asphalt and concrete, which absorb more solar radiation than lighter-colored surfaces like vegetation and soil. This is known as the "urban heat island effect," which further contributes to higher temperatures in urban areas.

For more question on evaporation click on

https://brainly.com/question/8944874

#SPJ11

Answer:

I dont a picture

Explanation:

but the answer is 24

Answer:

B.

Explanation:

Atoms make up molecules and ionic bonds cannot make up a molecule because they do not share electrons like in a covalent bond.

KP is 111.11 for CaCl2 if 200. 0 g of CaCl2 are required to aturate 100. 0 mL of solution.

Kp is nothing but equilibrium constant. chemical reaction's constant is the value of its reaction coefficient at equilibrium state, a state attained by a dynamic chemical equilibrium after a sufficient amount of time has passed where its structure has no quantifiable tendency to change further. At equilibrium, the equilibrium constant can tell us if the reaction has a greater density of product lines as well as reactants. Equilibrium constants include stabilisation constants, forming constants, conditional constants, association constants, and depersonalisation constants.

Learn more about  equilibrium constant here:

https://brainly.com/question/10038290

#SPJ4

The solubility of sodium carbonate is 21.5g per 100ml of water at 20°C

Solubility: The maximum amount of solute that can be dissolved in a given quantity of solvent at a specified temperature and pressure is referred to as solubility. A solution in which the maximum amount of solute has been dissolved at a specific temperature and pressure is known as a saturated solution.

.Now, we need to calculate how much sodium carbonate can be dissolved in 500 mL of water at 20°C. Using the unitary method:100 mL of water can dissolve 21.5 g of sodium carbonate. Therefore, 1 mL of water can dissolve `(21.5)/(100)` g of sodium carbonate.1 mL of water can dissolve 0.215 g of sodium carbonate.500 mL of water can dissolve `(0.215  500)` g of sodium carbonate.500 mL of water can dissolve 107.5 g of sodium carbonate. Therefore, 107.5 g of sodium carbonate can dissolve in 500 mL of water at 20°C.

To know more about sodium carbonate, visit:

https://brainly.com/question/31422792

#SPJ11

Answer:

Los elementos de la tabla periódica se distribuyen sobre la base de similitudes.

Explicación:

Los diferentes tipos de elementos se distribuyen en 8 grupos de tabla periódica en función de sus propiedades. Los elementos que tienen propiedades similares se colocan en el mismo grupo. Por ejemplo, el primer grupo de la tabla periódica son los metales alcalinos. Todos los metales alcalinos tienen algunas propiedades similares, es decir, un electrón en su capa más externa, alta reactividad y forma metálica, mientras que, por otro lado, los ocho elementos del grupo son gases nobles que tienen una capa más externa completa y no tienen reactividad.