According to the L/D classification system, all amino acids can be classified as either L-amino acids or D-amino acids.
L/D classification system is based on the configuration of the chiral carbon atom in amino acids, which determines their three-dimensional structure and properties.
In naturally occurring proteins, L-amino acids are the predominant form. This is because the enzymes involved in protein synthesis, such as ribosomes, preferentially recognize and incorporate L-amino acids into proteins. The L configuration refers to the arrangement of functional groups around the chiral carbon atom, resulting in a structure that is similar to the L isomer of glyceraldehyde.
D-amino acids, on the other hand, are relatively rare in nature but can be found in some peptides and bacterial cell walls. They have a configuration opposite to that of L-amino acids, with their functional groups arranged like the D isomer of glyceraldehyde. While D-amino acids are not typically used in protein synthesis, they can serve important roles in other biological processes, such as cell signaling and regulation.
In summary, amino acids can be classified as either L or D, based on the configuration of their chiral carbon atom. L-amino acids are predominant in nature and are primarily used in protein synthesis, while D-amino acids are less common but have unique biological roles.
Learn more about amino acids here: https://brainly.com/question/28362783
#SPJ11
Which of the following best illustrates a natural process acting as a constructive force
Answer:
Wind depositing sand to build up sand dunes.
Explanation:
calculate the standard cell potential for a battery based on the following reactions: sn2 2e- → sn(s) e° = -0.14 v au3 3e- → au(s) e° = 1.50 v
The standard cell potential for this battery is 1.64 V. This means that the battery will produce a voltage of 1.64 V when the reactions occur under standard conditions (1 atm pressure, 25°C temperature, and 1 M concentration of all species)
To calculate the standard cell potential for a battery based on the given reactions, we need to use the equation:
E°cell = E°cathode - E°anode
where E°cathode is the standard reduction potential of the cathode and E°anode is the standard reduction potential of the anode. The negative sign in front of the E°anode value is due to the fact that it is a reduction potential and we need to reverse the sign to get the oxidation potential.
So, in this case, we have:
E°cell = E°cathode - E°anode
E°cell = 1.50 V - (-0.14 V)
E°cell = 1.64 V
Therefore, the standard cell potential for this battery is 1.64 V. This means that the battery will produce a voltage of 1.64 V when the reactions occur under standard conditions (1 atm pressure, 25°C temperature, and 1 M concentration of all species).
To know more about cell potential, refer
https://brainly.com/question/19036092
#SPJ11
Which degree does Linda need to obtain?
Linda wants to pursue a career in the veterinary field. She enjoys training and teaching students. So, she wants to become a veterinary professor.
To become a veterinary professor, Linda needs to obtain a
degree in veterinary medicine.
Answer:
Doctorate
Explanation:
Answer for PLATO
some molecules have more than four electron groups around a central atom, such as sf6. what is the likely arrangement of the six electron groups?
Some molecules have more than four electron groups around a central atom, such as SF₆, the likely arrangement of the six electron groups will be Octahedral
In chemistry, compounds containing six atoms or groups of atoms or ligands symmetrically grouped around a central atom; consist octahedral molecular geometry which is also known as square bipyramidal. The prefix octa refers to the octahedron, which has eight faces.
SF₆ also consists of six atoms making octahedral geometry. In SF₆ 4 atoms will place themselves in a plane, one atom places itself above the plane, and one places, itself below the plane, resulting in an octahedral geometry.
You can also learn about molecular geometry from the following question:
https://brainly.com/question/11856948
#SPJ4
Which option is a natural material that is not a fossil fuel?
Explanation:
1. Cotton (B)
2. It needs to go through a chemical reaction. (C)
3. A chain of repeating compounds found in both natural and synthetic materials. (D)
4. Oil and natural gas are chemically broken down into small compounds that combine to form plastic.
The very active nonmetals fluorine, chlorine, bromine, iodine, and astatine are in the group called ________.
The very active nonmetals fluorine, chlorine, bromine, iodine, and astatine are in the group called halogen.
Six elements make up Group 17 of the periodic table, and these are the halogen elements. The elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At), with Tennessee (T) make up group 17, which is located in the second column from the right of the periodic table.
Halogens, or Group 17 on the periodic table, which include fluorine, are the most reactive nonmetals. This is due to the fact that each of their valence electron shells has one empty space.
Therefore, The very active nonmetals fluorine, chlorine, bromine, iodine, and astatine are in the group called halogen.
To know more about nonmetals
https://brainly.com/question/11807451
#SPJ4
calculate the avergae kineti c energy of the ch4 molecules in a sample of methane gas at 273k and 546k
The average kinetic energy of CH4 molecules in a sample of methane gas at 273K and 546K
6.00 x 10^-21 J and 1.19 x 10^-20 J
To calculate the average kinetic energy of CH4 molecules in a sample of methane gas at 273K and 546K, we need to use the formula:
KEavg = (3/2) kT
where KEavg is the average kinetic energy, k is the Boltzmann constant (1.38 x 10^-23 J/K), and T is the temperature in Kelvin.
At 273K, the average kinetic energy of CH4 molecules is:
KEavg = (3/2) x (1.38 x 10^-23 J/K) x (273K)
At 546K, the average kinetic energy of CH4 molecules is:
KEavg = (3/2) x (1.38 x 10^-23 J/K) x (546K)
Therefore, the average kinetic energy of CH4 molecules in a sample of methane gas increases as the temperature increases. This is because at higher temperatures, the molecules have more kinetic energy and move faster.
To learn more about : kinetic
https://brainly.com/question/25959744
#SPJ11
how much energy is needed to convert 120g of ice at -35°C to steam at 150°C?
Lemon juice has a pH of about 2.3 which
means it is considered to be in the
range.
a.acidic
b.basic
Answer:
Acidic
Explanation:
the pH scale ranges from 0 to 14, where 7 means the substance is neutral. Less than 7 means the substance is Acidic. Greater than 7 means the substance is Basic.
Remember that the lower the pH is, the more Acidic the substance is. In this case lemon juice is Acidic.
HELP PLZZZZ ASAP im so desperate to get this done if you can help plz plz plz do if i dont finish it ill be forced to redue the whole course over again
In this project, you will conduct research on a substance called polypropylene and explore the relationship
between its properties and its molecular structure. You will provide an explanation of how the molecular
structure is well suited for commercial use. You will also create a model of polypropylene to display its
structure.
Polypropylene has a crystalline structure which implies that the chains are arranged into neat patterns.
What is polypropylene?The molecule polypropylene is used as a thermoplastic and it is rigid. This rigidity makes it possible for the molecule to be applied in different situations where rigidity is important.
Polypropylene has a crystalline structure which implies that the chains are arranged into neat patterns which do not allow them to slide over each other. This enables the polymer to be rigid.
Learn more about polypropylene :https://brainly.com/question/12975644
#SPJ1
PLEASE HELP!! I NEED THIS IN IN 15 MINUTES. PLS HELP!!! What are the two ways to decrease the volume of an enclosed gas. Identify each way, then explain changes in particle behavior that are responsible for the volume decrease in each method.
Answer:t volume and amount of air
Explanation:According to Boyle's law, what is the relationship between pressure and volume? They are inversely related. As one increases, the other decreases
Evaluate the integral. (Remember to use absolute values where appropriate. Use C for the constant of integration 17 tan*(x) x? dx Need Help? Read It Submit Answer 11. [0/1 Points] DETAILS PREVIOUS ANSWERS SCALCET9 7.5.052. Evaluate the integral. (Use C for the constant of integration.) /2/697 64 + e* dx X
Answer:
integral of 17 tan*(x) x dx = uv - integral of v du
= (17 tan*(x))(1/2)x^2 - integral of (1/2)x^2 (17 sec^2(x) dx)
= (17/2) tan*(x) x^2 - (17/4) integral of sec^2(x) dx
= (17/2) tan*(x) x^2 - (17/4) tan(x) + C
where C is the constant of integration.
For the second integral, the integral of (64 + e^x)dx, we can integrate each term separately. The integral of 64 dx is simply 64x, and the integral of e^x dx is e^x. Therefore,
integral of (64 + e^x) dx = 64x
Explanation:
Answer has the explaination.
To evaluate the integral of 17 tan(x) x dx, we can use integration by substitution.
Let u = tan(x), then du/dx = sec^2(x) and dx = du/sec^2(x). Substituting these into the integral gives 17∫u du. Integrating u with respect to itself gives (17/2)u^2 + C. Substituting u = tan(x) back in gives the final answer of (17/2)tan^2(x) + C. Don't forget to include the absolute value of tan(x) when necessary. To evaluate the integral, first note the given function: 17tan(x) x^2 dx. We can apply integration by parts, using the formula ∫u dv = uv - ∫v du. Let u = x^2, so du = 2x dx, and let dv = 17tan(x) dx, so v = 17∫tan(x) dx = -17ln|cos(x)|.
Now, uv - ∫v du = -17x^2ln|cos(x)| - ∫(-17ln|cos(x)|)(2x dx). Next, apply integration by parts again on ∫(-17ln|cos(x)|)(2x dx), with u = 2x and dv = -17ln|cos(x)| dx.
Simplify and combine terms, then add C for the constant of integration to obtain the final answer.
To know more about integration visit:
https://brainly.com/question/31744185
#SPJ11
if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml iwth pure water, what isthe molarity of copper ii sulfate in the diluted soltuion
The molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
What is Molarity?Molarity is defined as the ratio of moles of solute to the volume of solution.
Mathematically,
Molarity = moles of solute / volume of solution
Step 1 : Calculation of molesGiven,
Initial volume of CuSO4 = 4 ml = 4/1000 = 0.004 l
Molarity of CuSO4 = 0.0250 m
By substituting all the values, we get
0.025 = moles/ 0.004
moles = 0.025 × 0.004 = 0.000100 mol
Moles = 0.0001 mol.
Step 2 : Calculation of molarity of final volumeTotal volume = 0.004 l + 10 ml
= 0.004 + 0.001 = 0.005 l
Moles of CuSO4 = 0.0001 mol
Molarity = 0.0001 / 0.005 = 0.02 M
Thus, we concluded that the molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
learn more about Molarity:
https://brainly.com/question/19517011
#SPJ4
Why is the difference between the second and third ionization energies (IE2 and IE3) of calcium so much larger than the difference between its first and second ionization energies
The second and third ionization energies of calcium are much larger than its first ionization energy because of the unique structure of the calcium atom.
Calcium has two valence electrons in its outer shell, and as a result, the first ionization energy is relatively low, as the first electron is easily removed. However, after the first electron has been removed, the remaining electrons are pulled more closely to the nucleus, increasing the energy required to remove the second electron.
The third ionization energy is even larger because now there are only 8 electrons remaining, meaning that the electrons are even more tightly held by the nucleus. As a result, more energy is required to remove a third electron.
The difference between the second and third ionization energies of calcium is much larger than the difference between its first and second ionization energies because of the structure of the calcium atom. Calcium has two valence electrons in its outermost shell, and as a result, the first ionization energy required to remove the first electron is relatively low.
This is because the outermost shell is less tightly bound to the nucleus than the inner shells, and the first electron can be removed easily.However, after the first electron has been removed, the remaining electrons are pulled more closely to the nucleus, increasing the energy required to remove the second electron.
This is because now, there is one less electron, meaning that the electrons are more tightly held by the nucleus and are less likely to be removed. Therefore, the second ionization energy of calcium is much larger than its first ionization energy.The third ionization energy of calcium is even larger than the second ionization energy because now there are only 8 electrons remaining in the outer shell. The electrons are now even more tightly held by the nucleus, and as a result, more energy is required to remove the third electron. The difference between the second and third ionization energies is much larger than the difference between the first and second ionization energies because of the unique structure of the calcium atom
the difference between the second and third ionization energies of calcium is much larger than the difference between its first and second ionization energies because of the unique structure of the calcium atom. The first electron can be removed easily because the outermost shell is less tightly bound to the nucleus than the inner shells.
However, after the first electron has been removed, the remaining electrons are pulled more closely to the nucleus, increasing the energy required to remove the second electron. Finally, the third ionization energy is even larger than the second ionization energy because now there are only 8 electrons remaining, meaning that the electrons are even more tightly held by the nucleus.
To know more about valence electrons visit:
brainly.com/question/31264554
#SPJ11
PLEASE ANSWER ALL I WILL GIVE BRAINLIEST PLEASE!!
Name three organelles and explain the function of each.
this is more science
giving 15 points
2H2O(g) -- 2H2(g) + O2(g)
What total volume of gas (at STP) is produced by the electrolysis of 4 moles of H2O?
Explanation:
\(v = vdm \times n\)
Vdm=22.4dm.
mole(n)=4 mol
therefore the total volume
\(v = 22.4 \times 4 \\ v = 89.6dm\)
Why are perchlorate salts unusually hazardous?
- They are toxic and volatile.
- Some are shock-sensitive.
- They are strong bases.
- They are water-reactive.
Perchlorate salts are unusually hazardous primarily because they are toxic and volatile.
Perchlorate salts are unusually hazardous primarily because they are toxic and some are shock-sensitive. Their toxicity can pose a risk to human health and the environment, while their shock-sensitive nature can cause them to react violently upon impact, potentially leading to accidents or explosions. Perchlorate salts are unusually hazardous due to several reasons. Firstly, they are toxic and volatile, meaning they can easily vaporize and become airborne, increasing the risk of inhalation and absorption through the skin. Secondly, some perchlorate salts are shock-sensitive, meaning they can easily detonate or explode when subjected to impact or friction.
Additionally, perchlorate salts are strong bases, which can cause severe chemical burns and damage to tissues and organs upon contact. Finally, they are also water-reactive, which can cause them to release oxygen and hydrogen gas, leading to potential fire and explosion hazards. Overall, the unique combination of these characteristics makes perchlorate salts particularly hazardous and requires careful handling and disposal.
Learn more about Perchlorate salts here: brainly.com/question/8269990
#SPJ11
LR sets and parser =======Consider the following grammar describing Lisp arithmetic. Since all symbols are single characters, spaces have been omitted for compatibility with our input specifications for programming exercises 4 to 7 S -> E // S is start symbol, E is expression E -> (FL) // F is math function, L is a list L -> LI | I // I is an item in a list I -> n | E // an item is a number n or an expression E F -> | - | * | * Find FIRST, FOLLOW and LR(0) sets for this grammar. Is the grammar LR(0)? Is it SLR?
To determine the FIRST, FOLLOW, and LR(0) sets for the given grammar, let's analyze each of them step by step.
FIRST sets: The FIRST set of a non-terminal symbol represents the set of terminal symbols that can appear as the first symbol of any string derived from that non-terminal. FIRST(S) = {(, n} FIRST(E) = {(} FIRST(L) = {(, n} FIRST(I) = {(, n} FOLLOW sets: The FOLLOW set of a non-terminal symbol represents the set of terminal symbols that can appear immediately after occurrences of that non-terminal in any string derived from the start symbol. FOLLOW(S) = {$}
learn more about:- Lisp arithmetic here
https://brainly.com/question/31330459
#SPJ11
what is the use of PVC
Answer:
PVC is a versatile material that offers many possible applications, these include; window frames, drainage pipe, water service pipe, medical devices, blood storage bags, cable and wire insulation, resilient flooring, roofing membranes, stationary, automotive interiors and seat coverings, fashion and footwear, packaging .
Explanation:
Write a definition for fluid that
incorporates time into a model of solids and liquids.
Definition: Fluid that can act as a liquid or as a solid depending on the pressure applied on it.
Explanation:
A fluid that incorporates time in a solid and liquid model is a non-Newtonian fluid. This type of fluid can behave as a solid or as a liquid depending on the pressure that is applied on it. This is different from normal fluids that remain the same regardless of the pressure they are subjected to. In the case of non-Newtonian fluids, when submitted to pressure, they are presented as solids, but without pressure, they are presented as liquids. This feature can be seen even within the same system.
Which element when combined with chlorine would most likely form an ionic compound
Answer:
Na (Sodium)
Explanation:
Sodium is a metal, and when combined with Chlorine (which is a non-metal) it creates an ionic compound
Option C is correct. The Sodium combined with Chlorine to form an ionic compound.
Ionic Compound:
These are the compounds that are made up of two ions, one positive and one negative. In the solution, they conduct electricity. They formed when a metal interacts with a non-metal.
For example- NaCl
NaCl in the water solution form positive Sodium and Negative Chlorine ion. The solution of NaCl conduct electricity,Na is a metal while Cl is a non- metal. Oxygen, Carbon and phosphorus are non-metal, they will not form an ionic compound.Therefore, the Sodium combined with Chlorine to form a an ionic compound.
To know more about ionic compounds, refer to the link:
https://brainly.com/question/10748806
group theoretical yield actual yield a 5.10 g 5.01 g b 4.99 g 4.38 g c 5.05 g 5.07 g
what is the percent yield of silver hydroxide based on group a’s results?
a) 9.00% b) 102.0% c) 98.2% d) 48.2%
Percent yield of silver hydroxide based on group a's results = 98.2%
Percent yield is calculated by dividing the actual yield of a reaction by the theoretical yield and multiplying the result by 100. The theoretical yield is the expected amount of product that should be obtained based on the stoichiometry of the reaction.
In group a, the theoretical yield of silver hydroxide is 5.10 g and the actual yield is 5.01 g. The percent yield can be calculated as follows:
Percent yield = (Actual yield / Theoretical yield) x 100 = (5.01 / 5.10) x 100 = 98.2%
Hence, the percent yield of silver hydroxide based on group a's results is 98.2%.
Learn more about percent yield here:
https://brainly.com/question/11963853
#SPJ4
Plot the mole fractions of CO2, H₂O, O2, and CO against the equivalence ratio (change phi from 0.3 to 2.0 with a step of 0.1) for CnH2n+2 air mixture. No of carbon "n" is the last digit of your roll/ID number. Use the NASA CEA program for your analysis.
By following the steps outlined above, you can analyze the mole fractions of CO2, H2O, O2, and CO for a CnH2n+2 air mixture against the equivalence ratio using the NASA CEA program. The resulting plot will provide insights into the composition of the mixture under different conditions.
1. Access the NASA CEA program: NASA Chemical Equilibrium with Applications (CEA) is a program used for chemical equilibrium calculations. You can access it online or download the software.
2. Set up the CEA input: Once you have access to the program, input the necessary parameters for your analysis. Specify the fuel composition as CnH2n+2 (replace 'n' with the last digit of your roll/ID number) and air as the oxidizer. Set the pressure and temperature conditions as desired.
3. Run the CEA program: Execute the program to perform the chemical equilibrium calculations. The program will provide you with the equilibrium composition of the mixture.
4. Extract mole fractions: From the CEA output, identify the mole fractions of CO2, H2O, O2, and CO for each equivalence ratio (phi) within the specified range (0.3 to 2.0 with a step of 0.1). Record these values for further analysis.
5. Plot the data: Once you have the mole fractions for each component at different equivalence ratios, you can plot them against the equivalence ratio (phi). Use a graphing software or tool of your choice to create a line or bar graph representing the mole fractions of CO2, H2O, O2, and CO on the y-axis and the equivalence ratio on the x-axis.
By following the steps outlined above, you can analyze the mole fractions of CO2, H2O, O2, and CO for a CnH2n+2 air mixture against the equivalence ratio using the NASA CEA program. The resulting plot will provide insights into the composition of the mixture under different conditions.
To know more about composition visit:
https://brainly.com/question/31500441
#SPJ11
Calculate the specific heat of the substance if 733 J is required to raise the temperature of a 312 gram sample by 15 Celsius?
Answer: Formula: q = mcΔT,
- q is the amount of heat transferred
- m is the mass of the substance
- c is the specific heat capacity of the substance
- ΔT is the change in temperature
q= 733 J
m= 312g
ΔT = 15 °C
Calculate this together = 733 J / 312g x 15 °C
= and then you can find your answer for c.
Explanation:
ammonia (nh3, 17.04 g/mol) is industrially produced from n2 and h2 using the haber process. what mass of h2 should be used if 34.0 kg nh3 must be the final yield when the reaction is run under conditions that produce only a 33.0% yield?
In industrial processes, ammonia (NH₃, 17.04 g/mol) is manufactured by combining nitrogen (N₂) and hydrogen (H₂) through a method known as the Haber process. 18.32 kg of H₂ is the mass of H₂ that should be used to produce 34.0 kg of NH₃ with a yield of 33.0%.
To determine the mass of H₂ required to achieve a final yield of 34.0 kg NH₃ with a yield of 33.0%, we need to use stoichiometry and the concept of percent yield.
The balanced equation for the production of ammonia from nitrogen and hydrogen is:
N₂ + 3H₂ → 2NH₃
According to the equation, 3 moles of hydrogen (H₂) are required to produce 2 moles of ammonia (NH₃).
Given:
Desired yield of NH₃ = 34.0 kg
Yield percentage = 33.0%
First, we calculate the theoretical yield of NH₃ based on the given yield percentage:
Theoretical yield of NH₃ = Desired yield / Yield percentage
Theoretical yield of NH₃ = 34.0 kg / (33.0/100) = 103.03 kg
Next, we determine the moles of NH₃ in the theoretical yield:
Moles of NH₃ = Theoretical yield / Molar mass of NH₃
Moles of NH₃ = 103.03 kg / 17.04 g/mol = 6045.74 mol
Since the stoichiometric ratio of H₂ to NH₃ is 3:2, we can calculate the moles of H₂ required:
Moles of H₂ = (3/2) × Moles of NH₃
Moles of H₂ = (3/2) × 6045.74 mol = 9068.61 mol
Finally, we convert the moles of H₂ to mass:
Mass of H₂ = Moles of H₂ × Molar mass of H₂
Mass of H₂ = 9068.61 mol × 2.02 g/mol = 18,324.35 g
Converting grams to kilograms:
Mass of H₂ = 18,324.35 g / 1000 = 18.32 kg
Therefore, the mass of H₂ that should be used to achieve a final yield of 34.0 kg NH₃ with a yield of 33.0% is approximately 18.32 kg.
To know more about the Haber process refer here :
https://brainly.com/question/30928282#
#SPJ11
Complete question :
Ammonia (NH₃, 17.04 g/mol) is industrially produced from N₂ and H₂ using the Haber process. What mass of H₂ should be used if 34.0 kg NH₃ must be the final yield when the reaction is run under conditions that produce only a 33.0% yield?
18.3 kg 3.03 kg 6.05 kg 6.05 kg. You selected this answer. 36.6 kg 8.91 kg
How does distance from the thermal energy source affect the amount of thermal energy transfer occurring in a substance
The distance from the thermal energy source affect the amount of thermal energy transfer occurring in a substance in a way that area that the radiation is spread over is four times as large for just the double distance.
Thermal energy that can transfer between substances always does so from one that is warmer to one that is cooler. Conduction, convention, and radiation are the three categories. Distance causes the heat radiation emitted by a source, such the sun, to disperse.
As it moves away from the source, the same quantity of energy is dispersed over a larger and larger sphere every second. For simply the twice distance, the radiation's distribution area is four times as large.
The solar constant (also known as the solar coefficient), abbreviated S, refers to the Sun's intensity on Earth, \(W/m^{2}\), in units. This information reveals how much radiation enters a square metre of Earth (or any other planet at a similar distance from the sun).
Learn more about radiation here;
https://brainly.com/question/1497235
#SPJ4
a certain reaction has an activation energy of 58.74 kj/mol. at what kelvin temperature will the reaction proceed 7.00 times faster than it did at 337 k?
A certain reaction has an activation energy of 58.74 kj/mol. At 507 kelvin temperature, the reaction proceed 7.00 times faster than it did at 337 k.
The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Kelvin scale (K), which is mostly used for scientific purposes, the Fahrenheit scale (°F), and the Celsius scale, which has the unit symbol °C.
1/T2 - 1/T1 = -Ea/(R×ln(k2/k1))
1/T2 - 1/T1 = -Ea/(R×ln7)
T2 = 1/(1/T1 - Ea/(Rln(7)))
T2 = 1/(1/337 - 58.74/(8.314×1.94591)) = 507 K
To know more about temperature, here:
https://brainly.com/question/7510619
#SPJ12
What is meant by 1m length
Answer:
The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 of a second.
PLEASE HELP!!!!! I'LL YOU BRAINIEST!!!!
Answer:
I believe 11 is B 12 is C 13 is B and 14 is C