Which of these is the correct definition of genetic modification/genetic engineering?


A. Altering the DNA of an organism at the molecular level

B. Choosing individuals to mate based on desired characteristics

C. Observing genetic changes in populations over time based on adaptive traits

D. Extracting stem cells to differentiate into specialized tissues

Answer:

The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency.

The possible Claisen condensation product from the reaction between CH3CO2Et (ethyl acetate) and CH3CH2CO2Et (ethyl propanoate) is CH3COCH2CH2CO2Et (ethyl 3-oxobutanoate).

The possible Claisen condensation product from the reaction between C6H5CO2Et (ethyl benzoate) and C6H5CH2CO2Et (ethyl phenylacetate) is C6H5COCH2C6H5CO2Et (ethyl 2-phenyl-2-phenylacetate). This product would be expected to predominate as it forms a conjugated system, which increases its stability. The possible Claisen condensation product from the reaction between EtOCO2Et (diethyl oxalate) and cyclohexanone is EtOCOC6H11CO2Et (diethyl cyclohexane-1,4-dicarboxylate). This product would be expected to predominate due to the steric hindrance around the alpha carbon of cyclohexanone, making it less favorable for deprotonation. The possible Claisen condensation product from the reaction between C6H5CHO (benzaldehyde) and CH3CO2Et (ethyl acetate) is C6H5CH=CHCO2Et (ethyl cinnamate). This product would be expected to predominate due to the presence of the aromatic ring, which stabilizes the enolate ion formed during the reaction.

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Answer:

The IUPAC names for Ascorbic Acid, Fructose, and Glucose are L-ascorbic acid, D-fructose, and D-glucose, respectively.

Explanation:

IUPAC (International Union of Pure and Applied Chemistry) names are standardized names used to identify chemical compounds. These names are based on the structure of the compound, and they provide a unique and unambiguous way to identify each compound.

The IUPAC name for Ascorbic Acid is L-ascorbic acid. Ascorbic acid is a compound with the chemical formula C6H8O6. It is a white, crystalline solid that is soluble in water. The "L" in the name indicates that the compound has a specific configuration of atoms, which is called the L-configuration.

The IUPAC name for Fructose is D-fructose. Fructose is a simple sugar with the chemical formula C6H12O6. It is a sweet-tasting substance that is commonly found in fruits and honey. The "D" in the name indicates that the compound has a specific configuration of atoms, which is called the D-configuration.

The IUPAC name for Glucose is D-glucose. Glucose is a simple sugar with the chemical formula C6H12O6. It is a sweet-tasting substance that is commonly found in plants and is an important source of energy for living organisms. The "D" in the name indicates that the compound has a specific configuration of atoms, which is called the D-configuration.

Answer:

The IUPAC name for ascorbic acid is 2-(1,2-dihydroxyethyl)-4,5-dihydroxyfuran-3-one.

The IUPAC name for fructose is (2R,3S,4R,5R)-2-(hydroxymethyl)-3,4,5-trihydroxytetrahydrofuran-3-ulose.

The IUPAC name for glucose is (2R,3R,4S,5S)-2-(hydroxymethyl)-3,4,5-trihydroxytetrahydrofuran-3-ulose.

Answer:

A) The crust

hope this helps :)

Explanation:

Answer:

The coolest part in the diagram shown is A.) The Crust

Explanation:

This is because as more and more layers form, they soon harden because they are further away from the heat force, which would be the core.

Hope this helps. Sorry if I am wrong. ;-;

The empirical formula is CH3O2

What is a empirical formula ?

An empirical formula tells us the relative ratios of different atoms in a compound. The ratios hold true on the molar level as well. Thus, H2O is composed of two atoms of hydrogen and 1 atom of oxygen. Likewise, 1.0 mole of H2O is composed of 2.0 moles of hydrogen and 1.0 mole of oxygen

Explanation:

From The question, number of moles of CO2= 4.89/44=0.111mol

Number of moles of H2O=3/18= 0.1667moles

Since 1mole of CO2 contains 1mole of carbon and 2 moles of O2,

Implies that there 0.111 moles of C and 0.222moles of O2

Similarly also 0.1667moles of water contains 2 moles of H2 hence = 0.333 moles of H2

Dividing by smallest number= 0.111mol

For C = 0.111/0.111= 1

For H = 0.333/ 0.111= 3

For O = 0.222/0.111= 2

Hence the empirical formula= CH3O2

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A. If the bubble point pressure is less than the operating pressure of the flash unit (0.6 bar), the mixture will flash. B. The final composition and amount of the phases will depend on the initial vapor fraction and the operating pressure. C. We can repeat the calculation in part B to determine the composition and amount of the equilibrium liquid and vapor at the new conditions. D. If the vapor fraction is high, it may indicate that the feed is rich in the more volatile components, such as toluene.

A. To determine if the mixture will flash, we need to compare the bubble point pressure (the pressure at which the first bubble of vapor appears) with the operating pressure of the flash distillation unit. We can use a software tool or a phase equilibrium diagram to calculate the bubble point pressure for the given mixture. If the bubble point pressure is less than the operating pressure of the flash unit (0.6 bar), the mixture will flash.

B. If the mixture flashes, we can calculate the composition and amount of the equilibrium liquid and vapor using the material balance and the equilibrium relationship. We need to assume an initial vapor fraction, and then calculate the vapor and liquid flow rates, and check if the initial assumption is consistent with the equilibrium relationship.

We can repeat this process until we converge to a consistent solution. The final composition and amount of the phases will depend on the initial vapor fraction and the operating pressure.

C. To determine if the mixture will flash at 1.5 bar and 140°C, we need to repeat the same calculation as in part A, but using the liquid exiting the first flash unit as the feed. If the mixture flashes, we can repeat the calculation in part B to determine the composition and amount of the equilibrium liquid and vapor at the new conditions.

D. To calculate the percentage of the original benzene that is now a vapor, we need to add up the vapor flow rates of benzene in both flash units and divide by the total benzene flow rate in the feed. We can use the same approach to calculate the percentage of toluene that is now a vapor.

The percentage will depend on the operating conditions and the composition of the feed. If the vapor fraction is high, it may indicate that the feed is rich in the more volatile components, such as toluene.

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A chemical reaction in which bonds are created is usually associated with The consumption of energy

Consumption method using, shopping for, or consuming something. If we do not lessen our power intake, we are able to run out of fuel. Conspicuous intake is shopping for something to expose off. Consumption is associated with the verb consume, which means to eat, use, or buy.

There are four Consumption kinds of client goods. They are comfort goods, distinctiveness goods, purchasing goods, and unsought goods.

Consumption of Food intake is a periodic behavior. It is brought on at diverse moments of the day through some converging factors (time of day, want a state, sensory stimulation, social context, etc.).

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Answer:

A.pack your lunch in a reusable container each day

Explanation:

done!!!mark me the brainliest

The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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Answer:

2.4

Explanation:

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

Answer:

It does not react with water, but reacts with most acids

Explanation:

Answer:

It doesn't react with water, but reacts with most acids

Yes it is but I have to check so wait

Answer:

Helium Hotspots may not work if the Hotspot is behind a firewall or uses an incompatible NAT type. Other times it may be because of a router configuration or the internet is offline.

Explanation:

1.Check Your Cables If using Ethernet, make sure your Ethernet cable is securely plugged into the Hotspot and your internet provider modem. A blinking amber light next to the Ethernet port on the Hotspot means there is a good connection. Cables can also fail from time to time, so trying a different cable can help may also help.

2.Check Your Internet Connection Confirm that you are able to connect to the Internet from your location using your home computer, on the same network. If you cannot connect to the Internet, you will need to contact your Internet Service Provider (ISP) for additional assistance on your account/connection.

The chemist can conclude that the liquid is gaining heat or experiencing an increase in thermal energy.

Thermal energy in chemistry is the energy transferred from one object to another due to a temperature difference. This type of energy is also known as heat energy and is associated with the motion of molecules within an object. At the molecular level, thermal energy can be seen as the kinetic energy of the molecules which are constantly in motion. When two objects with different temperatures come into contact, heat energy is transferred from the object with the higher temperature to the object with the lower temperature. This process continues until both objects reach thermal equilibrium, meaning that the temperatures of both objects are equal. Thermal energy can also be created by the friction between two objects, or by the combustion of a fuel.

From this observation, the chemist can conclude that the liquid in the vat is undergoing a chemical reaction. To determine the exact nature of the reaction, further analysis would be needed. This could include measuring the rate of temperature increase, the products of the reaction, and the reaction enthalpy.

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Answer:

An important distinction between molality and molarity is the difference between a solution and a solvent. Molarity is the ratio of the moles of a solute to the total liters of a solution. ... Molality, on the other hand, is the ratio of the moles of a solute to the kilograms of a solvent.

Answer:

sweat

Explanation:

you get dehydrated in hot weather because your body will release sweat to try and keep you cool

Answer:

Well, the heat can sometimes be very subtle in how it affects the body. If you're out in the sun, it can take just 30 minutes or up to a few hours for the heat to cause dehydration, nausea or it could cause trouble concentrating. When it's hot and humid, your risk of dehydration and heat illness increases. That's because when the air is humid, sweat can't evaporate and cool you as quickly as it normally does, and this can lead to an increased body temperature and the need for more fluids.

I HOPE DAT THIS HELPS :)

Explanation:

Answer:

Winds

Explanation:

It is in the lesson in accelarate I saw it myself to be sure I also took the quiz and that was correct. Thank you and please like and/or vote 5 stars it means a lot <3 and i hope you do well and have a great day ily :)

Answer:

Winds

Explanation:

it was correct when i took the quiz!!

The statement that is not true of natural selection is: Natural selection controls evolution by maintaining the features that individuals acquire over their lifetimes. So, option C is correct.

Natural selection does not directly affect features acquired throughout an individual's lifespan; rather, it affects traits that are already existing in the gene pool of a population. Natural selection is the process through which individuals with particular heritable qualities experience differential survival and reproduction, changing the frequencies of those traits within a population over time. Natural selection favors features that offer an advantage in the current environment, resulting in their preservation and increased frequency while eliminating those that are unfavorable.

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The complete question is:

Which of the following is not true of natural selection?

a) Natural selection strives to preserve beneficial qualities while eliminating harmful ones.

b) The next generation will consist more heavily of descendants of people who have improved environmental adaptation.

c) Natural selection controls evolution by maintaining the features that individuals acquire over their lifetimes.

d) Genetic diversity in a population is affected by natural selection; it results through mutation.

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer:

4.30 × 10²⁰ atoms

Explanation:

You need to find out how many moles you have.  First, convert milligrams to grams.

62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Next, use the molar mass to convert from grams to moles.

0.0625 g ÷ 87.62 g/mol = 7.13 × 10⁻⁴ mol

To convert from moles to atoms, you need to use Avogadro's number (6.022 × 10²³).  Avogadro's number is the number of atoms in a mole.

7.13 × 10⁻⁴ mol × 6.022 × 10²³ atoms/mol = 4.296 × 10²⁰ ≈ 4.30 × 10²⁰ atoms

You will have 4.30 × 10²⁰ atoms of strontium.

The number of Strontium atoms are 4.30 × 10²⁰ atoms

Given:

Mass of Strontium = 62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Molar mass of Strontium = 87.62 g/mol

To find:

Moles of Strontium = ?

It is defined as given mass over molar mass.

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\\text{Number of moles}=\frac{0.0625 g}{87.62 g/mol }\\\\\text{Number of moles}=7.13 * 10^{-4} mol\)

Avogadro's number is the number of atoms in a mole (6.022 * 10²³)

Conversion of moles into atoms:

\(7.13 × 10^{-4} mol * 6.022 * 10^{23} atoms/mol \\\\\text{ Sr atoms}= 4.296 * 10^{20} = 4.30 * 10^{20} atoms\)

Thus, Strontium atoms will be 4.30 × 10²⁰ atoms.

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Answer:

gidgjfxdgjxhfkzyjyfxgjfxj

Explanation:

9. In terms of Material Sustainability Attribute HPD gives information about a product's content, any potential health hazards associated with the product, and the safe handling and disposal of the product.

10. In terms of sustainability, VOC gives information about chemicals emitted by building materials and finishes that can cause negative health effects for people and contribute to air pollution.

11. Single attribute product sustainability attributes are assessed for particular issues such as emission of VOCs, thermal performance, and energy performance. Thus, option E. (a, b, c) is correct.

12. International Green Construction Code is developed by ICC (International Code Council) in response: all of the above is the correct answer (Option E).

13. The statement "lumber applies to wood products derived directly from logs through sawing and planning operations with no other manufacturing except cutting to length" is true.

14. The statement "the terms lumber, solid lumber, solid sawn lumber, and sawn lumber are synonymous" is true.

15. Wood is known for its high strength-per-weight ratio as compared to other structural materials. (Option B).

16. The statement "Wood is much stronger by weight than concrete" is false because wood is less strong by weight than concrete.

17. The statement "Concentric annual rings are visible in the vertical section of a tree and provide a good estimation of the age of the tree" is true.

HPD stands for Health Product Declaration. In terms of Material Sustainability Attribute HPD gives information about a product's content, any potential health hazards associated with the product, and the safe handling and disposal of the product. VOC stands for Volatile Organic Compounds. In terms of sustainability, VOC gives information about chemicals emitted by building materials and finishes that can cause negative health effects for people and contribute to air pollution.

International Green Construction Code is developed by ICC (International Code Council) in response to demand and initiatives such as LEED. It is a baseline code as opposed to a multi-tiered rating system. It applies primarily to non-residential buildings. It is newly developed and not yet widely adopted and has some conflicts with the LEED certification process.

Thus, the correct answer is

11. E

12. E

13. True

14. True

15. B

16. False

17. True

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Answer:

jghjhfghjklkjhgfdgfdsdh

Explanation:

Answer:

vaporisation and freezing

Explanation:

also whoever is the other guy who answered it for points is a ***** ( brainly yelled at me and called me rude)

Answer:

Explanation:

The basic idea of a hypothesis is that there is no predetermined outcome. For a solution to be termed a scientific hypothesis, it has to be an idea that can be supported or refuted through carefully crafted experimentation or observation.

Answer:

Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.

Explanation:

The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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