The active site of chymotrypsin is made up of Choose one:
O Asp 102 and His57 from the A chain and Ser 195 from the C chain.
O Asp 102 and Ser195 from the B chain and His57 from the C chain.
O Asp 102 and His57 from the A chain and Ser195 from the B chain.
O Asp 102 and His57 from the B chain and Ser195 from the C chain.

Answer:

my answer is num:3 Hydrogen and oxygen.

The increasing order of melting point among the given compounds is Argon (Ar), Carbon dioxide (CO₂), Water (H₂O) and Sodium chloride (NaCl).

1. Ar (Argon) - As a noble gas, argon has the lowest melting point due to its weak van der Waals forces. Its melting point is -189.3°C.

2. CO₂ (Carbon dioxide) - CO₂ is a molecular compound held together by covalent bonds, but it has a low melting point because it sublimates directly to gas. Its melting point is -78.5°C.

3. H₂O (Water) - Water has a relatively high melting point for a molecular compound because of its hydrogen bonding. Its melting point is 0°C.

4. NaCl (Sodium chloride) - NaCl is an ionic compound with strong electrostatic forces between its ions, resulting in the highest melting point among these substances. Its melting point is 801°C.

Learn more about melting point here:
https://brainly.com/question/29578567

#SPJ11

The molar mass of aspartame is approximately 294.30 g/mol with 5 oxygen atoms and 1.51 × 10^23 molecules of aspartame. There are approximately 0.068 moles of aspartame in 20.0 g.

i) To calculate the molar mass of aspartame, we need to sum up the atomic masses of all the atoms in its chemical formula, C14H18N2O5:

Molar mass of carbon (C) = 12.01 g/mol

Molar mass of hydrogen (H) = 1.01 g/mol

Molar mass of nitrogen (N) = 14.01 g/mol

Molar mass of oxygen (O) = 16.00 g/mol

Molar mass of aspartame = (14 × molar mass of C) + (18 × molar mass of H) + (2 × molar mass of N) + (5 × molar mass of O)

Calculating the molar mass of aspartame:

Molar mass of aspartame = (14 × 12.01) + (18 × 1.01) + (2 × 14.01) + (5 × 16.00)

Molar mass of aspartame ≈ 294.30 g/mol

Therefore, the molar mass of aspartame is approximately 294.30 g/mol.

ii) To determine the number of moles of aspartame in 20.0 g, we can use the molar mass of aspartame:

moles = mass / molar mass

moles = 20.0 g / 294.30 g/mol

moles ≈ 0.068 moles

Therefore, there are approximately 0.068 moles of aspartame in 20.0 g.

iii) To calculate the number of molecules of aspartame in 0.250 moles, we can use Avogadro's number:

number of molecules = moles × Avogadro's number

number of molecules = 0.250 moles × 6.022 × 10^23 molecules/mol

number of molecules ≈ 1.51 × 10^23 molecules

Therefore, there are approximately 1.51 × 10^23 molecules of aspartame in 0.250 moles.

iv) To calculate the number of oxygen atoms in one molecule of aspartame, we can look at the chemical formula:

C14H18N2O5

There are 5 oxygen atoms in one molecule of aspartame.

Therefore, there are 5 oxygen atoms in aspartame.

Learn more about Aspartame here:

brainly.com/question/10797758

#SPJ11

Answer:

Reproduction

Explanation:

Reproduction is the biological process by which new “offspring” (like organisms) are produced from their “parents" (the original organism)

Answer: True

Explanation:

I did the ck-12 quiz

Water is able to dissolve many compounds is the 2) the fact that water molecules are polar.

When a liquid spreads over the surface flippantly with out the formation of droplets, a floor is wetted. If that liquid is water, the surface is hydrophilic. Water molecules have a polar association of oxygen and hydrogen atoms—one side (hydrogen) has a wonderful electric charge and the alternative side (oxygen) had a terrible rate. This lets in the water molecule to turn out to be drawn to many different unique varieties of molecules. Generally speaking, water is right at dissolving ions and polar molecules, however terrible at dissolving nonpolar molecules.

Thus, option 2 is the correct choice.

To learn more about hydrophilic check the link below:

https://brainly.com/question/18522370

#SPJ4

Answer:

Yes, it can transmit heat because the heat will escape through the glass and stopper.

Explanation:

I took the test, and also i think logically we know that heat could still transfer and get out through the glass

The total energy required to change 10 grams of ice at zero degrees Celsius to steam at 100 degrees Celsius is 800 + 1000 + 5400 = 7200 calories.

To change 10 grams of ice at zero degrees Celsius to steam at 100 degrees Celsius, we need to calculate the energy required to melt the ice, heat the resulting water to its boiling point, and then convert it into steam.

First, we need to calculate the energy required to melt the ice, which can be done using the latent heat of fusion of H2O, which is 80 cal/g. So, the energy required to melt 10 grams of ice would be 10 grams * 80 cal/g = 800 calories. Next, we need to heat the resulting water to its boiling point. The specific heat of water is 1 cal/g, and we need to raise the temperature of 10 grams of water from 0 degrees Celsius to 100 degrees Celsius, so the energy required would be 10 grams * 100 degrees Celsius * 1 cal/g = 1000 calories. Finally, we need to convert the water into steam, which requires the latent heat of vaporization of H2O, which is 540 cal/g. So, the energy required would be 10 grams * 540 cal/g = 5400 calories.

Therefore, the total energy required to change 10 grams of ice at zero degrees Celsius to steam at 100 degrees Celsius is 800 + 1000 + 5400 = 7200 calories.

To know about energy :

https://brainly.com/question/1932868

#SPJ11

The use of chromatography can be an effective means of purifying samples, and TLC plates can be a useful tool for confirming the purity of a sample before and after purification.

TLC plates are a common tool used to analyze the purity of samples, and they are often used to compare the purity of a crude sample versus one that has been purified by column chromatography. In the case of our question, it is likely that the TLC plates showed a significant difference between the two samples.

Typically, a crude sample will show multiple spots on a TLC plate, indicating impurities or multiple compounds present in the sample. When the sample is purified by column chromatography, it is expected to show a single spot on the TLC plate, indicating a pure compound.

Therefore, if the TLC plates for the crude sample and the purified sample show a significant difference, then it is likely that the chromatography served to purify the sample. This can be further confirmed by analyzing the samples using other techniques, such as NMR or mass spectrometry, to confirm the identity and purity of the compound.

To learn more about Chromatography :

https://brainly.com/question/1394204

#SPJ11

The value of Kp for the given equilibrium reaction at 300.0 K is 4.99.

The equilibrium constant, Kp, is a numerical representation of the ratio of product concentrations to reactant concentrations at equilibrium for a particular reaction. In this case, we have the equilibrium reaction NH4HS (s) ⇌ NH3 (g) + H2S (g) at 300.0 K.

The given values for pNH3 and pH2S are both 0.109 atm. The equilibrium constant, Kp, is calculated by dividing the partial pressure of the products raised to their stoichiometric coefficients by the partial pressure of the reactant raised to its stoichiometric coefficient.

By substituting the given values into the equation, we find that Kp = 4.99.

Learn more about equilibrium

brainly.com/question/30694482

#SPJ11

Answer: "Dried mineral water" is a bit of a confusing term, because water is a liquid and cannot really be dried in the traditional sense. However, minerals that are dissolved in water can be left behind when the water evaporates or is removed in some way.

If we assume that you are referring to mineral-rich water that has been evaporated or otherwise had the water removed, then the minerals that were dissolved in the water could form a solid residue or deposit. The exact composition of this residue would depend on the specific minerals present in the water.

For example, if the mineral water contained a high concentration of calcium and magnesium, then the residue could potentially be calcium and magnesium carbonate, which is the same mineral that makes up limestone. If the water contained a high concentration of sodium and chloride, then the residue could be salt.

In general, when water containing minerals evaporates or is removed, the minerals can precipitate out of solution and form a solid deposit. The exact composition of this deposit will depend on the specific minerals present in the water.

The estimated diffusivity of naphthalene (C₁₀H₈) in air at 303 K and 1 bar is 0.021 cm²/s, which is lower than the experimental value of 0.087 cm²/s reported in appendix A.

To estimate the diffusivity, we can use the Wilke-Chang equation, which is commonly used for dilute gas systems:

D = (2.628 × 10⁻⁴ × T(3/2))/(P × Ω)

where D is the diffusivity in cm²/s, T is the temperature in Kelvin, P is the pressure in bar, and Ω is the molecular weight of the gas in grams/mol.

Using the given values for T = 303 K and P = 1 bar, and the molecular weight of naphthalene (C₁₀H₈) as 128.18 g/mol, we can calculate the diffusivity:

D = (2.628 × 10⁻⁴ × (303)(3/2))/(1 × 128.18)

D ≈ 0.021 cm²/s

The estimated diffusivity is significantly lower than the experimental value of 0.087 cm²/s, indicating that the actual diffusivity of naphthalene in air at the given conditions may be higher than the estimated value. This discrepancy could be due to factors such as experimental uncertainties, deviations from ideal gas behavior, or the presence of impurities affecting the diffusion properties.

learn more about Wilke-Chang equation HERE:

https://brainly.com/question/13494084

#SPJ4

ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Polar covalent compounds are electrical conductors. Polar compounds comprise chemical compounds held together through polar covalent bonds.

A polar compound is a chemical species that has two or even more atoms that are linked together by polar covalent bonds that share electrons irregularly. ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Therefore,  ClO\(_2\), H\(_2\)O are the polar covalent compounds.

To know more about polar covalent compound, here:

https://brainly.com/question/30420584

#SPJ1

Answer: The correct options are options B,C,F,G and H. All these groups

contain a double bond and hence a pi bond.

Explanation:

Side-on overlaps of orbitals result in pi bond formation. It usually formed by p orbitals although d orbitals can also form them. The 2p orbital of carbon is capable of forming pi bonds and its 2p electrons are used in double bonds or triple bonds. Ether,Alkane,Alcohol are saturated hydrocarbons i.e. without double or triple bonds. Hence, rest of the molecules such as alkene,alkyne,ester, carboxylic acid and aldehyde contain atleast 1 pi bond.

To learn more about pi bond,

https://brainly.com/question/13243902

The half-life of the substance is 3.106 years.

Here,

a = the initial amount of substance

1-r is the decay rate

x = time span

The equation is given in its correct form as follows:

a = \(a_{0}\)×\((0.8)^{t}\)

As this is an exponential decay of a first order reaction, t is an exponent of 0.8.

Now let's figure out the half life. Since the amount left is half of the initial amount at time t, that is when:

a = 0.5 a0

0.5\(a_{0}\) = \(a_{0}\)×\((0.8)^{t}\)

0.5 = \((0.8)^{t}\)

taking log on both sides

t log 0.8 = log 0.5

t = log 0.5/log 0.8

t = 3.106 years

The half-life of the substance is 3.106 years.

To learn more about exponential decay formula visit:

https://brainly.com/question/28172854

#SPJ4

Answer:

D. Pressure

Explanation:

The rate of a reaction is defined as the speed at which the reactants are converted into products. Factors influencing the rate of a reaction are concentration, catalyst, temperature, surface area,  and pressure, etc.

In case of the reaction rate of gases, pressure will only have its affect as pressure do not have any influence on solid and liquid.

While concentration, surface area and catalyst influence all reaction rates including solid, liquids and gases.

Hence, the correct option is (d) pressure.

Answer:

2.4

Explanation:

Divide 7.0 by 3.0 you get 2.333333 then round it of to 2.34

The number of calories required for 47.5g of Al to go from 25°C to 62°C is approximately 381.1 calories.

The concept of specific heat is rooted in the amount of heat energy needed to increase the temperature of a single unit mass of a substance by one degree Celsius (or one Kelvin). This measurement is commonly denoted in units of joules per gram per degree Celsius (J/g°C) or joules per gram per Kelvin (J/gK).

Equation:

q = m × c × ΔT

Plugging the given values, we get:

q = 47.5 g × 0.900 J/g°C × (62°C - 25°C)

q = 47.5 g × 0.900 J/g°C × 37°C

q = 1595.25 J

To convert this to calories, we divide by the conversion factor of 4.184 J/cal:

q = 1595.25 J ÷ 4.184 J/cal

q = 381.1 cal

To know more about specific heat, click here

https://brainly.com/question/11297584

#SPJ1

To determine the molar solubility of BaF2 in a solution containing 0.0750 M LiF, we need to use the common ion effect.

First, we need to write the balanced equation for the dissolution of BaF2:

BaF2(s) ⇌ Ba2+(aq) + 2F-(aq)

The Ksp expression for BaF2 is:

Ksp = [Ba2+][F-]2

We are given that Ksp = 1.7 × 10^-6.

Next, we need to consider the effect of the added LiF on the solubility of BaF2. Since LiF also contains F- ions, it will shift the equilibrium to the left, decreasing the solubility of BaF2.

Let's assume that x moles of BaF2 dissolve in the presence of 0.0750 M LiF. Then, the equilibrium concentrations of Ba2+ and F- will be:

[Ba2+] = x
[F-] = 2x + 0.0750

We can substitute these into the Ksp expression and solve for x:

1.7 × 10^-6 = x(2x + 0.0750)2

Solving this quadratic equation gives us:

x = 8.5 × 10^-7 M

Therefore, the molar solubility of BaF2 in a solution containing 0.0750 M LiF is option B) 8.5 × 10^-7 M.

For more questions on molar solubility : https://brainly.com/question/28202068

#SPJ11

Answer:

The nucleus is responsible for storage as well as the transfer of genetic materials in the form of DNA or RNA.  It aids in the process of transcription by the synthesis of mRNA molecules and the nucleus controls the activity of all other organelles while facilitating processes like cell growth, cell division and synthesis of proteins.

Explanation:

The nucleus is a double membrane-bound structure responsible for controlling all cellular activities as well as a center for genetic materials, and it’s transferring.

Answer:

It is the nucelus

Explanation:

the nucleus is the control center of the cell

The number of quarts of 5% solution that can be made from 4.73 grams of the drug is 100 quarts.

To calculate the number of quarts of 5% solution that can be made from 4.73 grams of the drug, we need to use the formula that relates the amount of drug to the concentration and volume of the solution. Let's first convert the drug quantity to grams. Since 1 gram is equivalent to 1000 milligrams, then:

4.73 grams = 4730 milligrams

Now, let's plug in the values into the formula and solve for the volume of the solution.

Amount of drug (in grams) = Concentration (as a decimal) × Volume of solution (in milliliters)

To convert milliliters to quarts, we will divide the volume by 946.35 (1 quart = 946.35 milliliters). So we have:

4730 mg = 0.05 × Volume of solution (in milliliters)

Volume of solution = 4730 ÷ 0.05 = 94,600 milliliters (ml)

Number of quarts of solution = 946.35 = 100 quarts (rounded to the nearest whole number).

Therefore, 100 quarts of 5% solution can be made from 4.73 grams of the drug.

Learn more about quarts: https://brainly.com/question/4418837

#SPJ11

There are 0.1667 M chloride ions present in the mixture.

This new solution should be 50ml in volume, as requested. As a result, 1 out of every 25 "units" of the new solution—each of which is equivalent to 50 ml / 25 = 2 ml—is created from the initial 1 M solution. 24 of the remaining units are just water. Hence, we require 48ml of water and 2ml of a 1M NaCl solution.

Hence, the total moles of chloride ions in the mixture are:

total moles of Cl- = 0.00250 moles + 0.0100 moles = 0.0125 moles

To calculate the concentration of chloride ions in the mixture, we must divide the total moles of chloride ions by the total volume of the mixture, which is:

total volume = volume of NaCl solution + volume of KCl solution

= 25.0 mL + 50.0 mL

= 75.0 mL

= 0.0750 L

To know more about chloride visit:-

https://brainly.com/question/31048989

#SPJ1

Applying classifying the chemical reactions the results are:

1) Combination reaction

2) Double displacement reaction

3) Single displacement reaction

4) Decomposition reaction

The four chemical reactions you provided can be classified as follows:

S + O₂ → SO₂

This reaction is a combination reaction or synthesis reaction. It involves the combination of the elements sulfur (S) and oxygen (O₂) to form the compound sulfur dioxide (SO₂).

CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl

This reaction is a double displacement reaction or metathesis reaction. It involves the exchange of ions between the reactants to form new compounds. Calcium chloride (CaCl₂) reacts with silver nitrate (AgNO₃) to produce calcium nitrate (Ca(NO₃)₂) and silver chloride (AgCl).

Zn + CuSO₄ → Cu + ZnSO₄

This reaction is a single displacement reaction or substitution reaction. Zinc (Zn) reacts with copper sulfate (CuSO₄) to form copper (Cu) and zinc sulfate (ZnSO₄) by replacing the copper ion in the copper sulfate solution with zinc.

2Na₂O → 4Na + O₂

This reaction is a decomposition reaction. It involves the breakdown of a compound into its constituent elements or simpler compounds. Here, sodium oxide (Na₂O) decomposes into sodium (Na) and oxygen gas (O₂).

The completed question is given as,

Classify each of the following chemical reactions.

S + O₂ → SO₂

CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl

Zn + CuSO₄ → Cu + ZnSO₄

2Na₂O → 4Na + O₂

Learn more about Chemical reactions from the link given below.

https://brainly.com/question/29762834

#SPJ4

Answer:

i think its solar radiation

It's important to note that this calculation assumes complete dissolution of sodium chloride in water and does not account for any other impurities or substances that may be present in the eye drop solution.

To determine the percent mass of sodium chloride in the eye drop solution, we can follow these steps:

Step 1: Calculate the total mass of the eye drop solution.

The total mass of the eye drop solution is the sum of the mass of sodium chloride and the mass of water.

Total mass = Mass of sodium chloride + Mass of water

Total mass = 0.45 g + 49.55 g

Total mass = 50 g

Step 2: Calculate the mass of sodium chloride as a percentage of the total mass.

Mass percent of sodium chloride = (Mass of sodium chloride / Total mass) × 100

Mass percent of sodium chloride = (0.45 g / 50 g) × 100

Mass percent of sodium chloride = 0.9%

Therefore, the percent mass of sodium chloride in the eye drop solution is 0.9%.

In this calculation, we assumed that the density of the water is approximately 1 g/mL. Additionally, we used the mass of water instead of volume since the density is given in grams.

To learn more about density visit;

https://brainly.com/question/29775886

#SPJ11

Compounds are substances formed by the chemical combination of two or more elements in definite proportions. These elements can be metals, non-metals, or a combination of both. The atoms in compounds are held together by chemical bonds, which can be ionic or covalent.

Scientists name compounds using a systematic approach called chemical nomenclature. The naming process follows specific rules and conventions to ensure clarity and consistency. One common naming system is the IUPAC (International Union of Pure and Applied Chemistry) system. This system provides guidelines for naming both inorganic and organic compounds.

In the IUPAC system, the name of an inorganic compound typically reflects its composition and valence of the elements present. For example, sodium chloride is named based on the elements sodium and chlorine. The name "sodium" comes from the metal sodium, and "chloride" indicates the presence of the element chlorine.

Organic compounds, which contain carbon, have a more complex naming system. The IUPAC system assigns a specific name to each organic compound based on its structure and functional groups. This systematic approach allows scientists to identify and communicate the precise composition of the compound.

In addition to the IUPAC system, there are common names for some compounds that have been in use for many years. These names are often derived from historical or traditional sources. However, the IUPAC system is preferred for its consistency and universality.

By using a systematic naming approach, scientists can communicate effectively about compounds, ensuring that others can understand the chemical composition and properties of these substances. The naming process facilitates accurate identification, classification, and study of compounds in various scientific disciplines.

to know more about chemical bonds, click this link

brainly.com/question/30387060

#SPJ11

Compounds are substances formed by the chemical combination of two or more elements in definite proportions. These elements can be metals, non-metals, or a combination of both. The atoms in compounds are held together by chemical bonds, which can be ionic or covalent.

Scientists name compounds using a systematic approach called chemical nomenclature. The naming process follows specific rules and conventions to ensure clarity and consistency. One common naming system is the IUPAC (International Union of Pure and Applied Chemistry) system. This system provides guidelines for naming both inorganic and organic compounds.

In the IUPAC system, the name of an inorganic compound typically reflects its composition and valence of the elements present. For example, sodium chloride is named based on the elements sodium and chlorine. The name "sodium" comes from the metal sodium, and "chloride" indicates the presence of the element chlorine.

Organic compounds, which contain carbon, have a more complex naming system. The IUPAC system assigns a specific name to each organic compound based on its structure and functional groups. This systematic approach allows scientists to identify and communicate the precise composition of the compound.

In addition to the IUPAC system, there are common names for some compounds that have been in use for many years. These names are often derived from historical or traditional sources. However, the IUPAC system is preferred for its consistency and universality.

By using a systematic naming approach, scientists can communicate effectively about compounds, ensuring that others can understand the chemical composition and properties of these substances. The naming process facilitates accurate identification, classification, and study of compounds in various scientific disciplines.

to know more about chemical bonds, click this link

brainly.com/question/30387060

#SPJ11

Answer:

Option B.

Explanation:

Isotopy is a phenomenon where by two or more atoms have the same atomic number (proton) but different mass number due to the difference in neutron present in the atoms. The atoms that exhibit Isotopy are isotopes.

With the above information, we can obtain the right answer to the question given above as follow:

For option A:

Isotope >> atomic no >> Mass no

16 8X >>> 8 >>>>>>>>> 16

16 6X >>> 6 >>>>>>>>> 16

Since they have the different atomic number, they are not isotope.

For option B:

Isotope >> atomic no >> Mass no

16 8X >>> 8 >>>>>>>>> 16

17 8X >>> 8 >>>>>>>>> 17

Since they have the same atomic number but different mass number, they are isotope.

For option C:

Isotope >> atomic no >> Mass no

12 6X >>> 6 >>>>>>>>> 12

14 7X >>> 7 >>>>>>>>> 14

Since they have different atomic number, they are not isotope.

For option D:

Isotope >> atomic no >> Mass no

6 26X >> 26 >>>>>>>>> 6

26 6X >>> 6 >>>>>>>>> 26

Since they have different atomic number, they are not isotope.

From the above illustration, only option B contains isotopes because the atoms have the same atomic number but different mass number

Answer:

Biological Evidence

Explanation:

Both blood and sweat are fluids within the body, therefore, both are biological substances.

\(\huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}} \)