While fatty acids are most often formed by the condensation of __-carbon units, isoprenoids are assembled from __-carbon units.
Answers
Fatty acids are most commonly formed by the condensation of two-carbon units, while isoprenoids are assembled from five-carbon units.
A fatty acid is a type of carboxylic acid that has a long aliphatic chain that is either saturated or unsaturated and a carboxyl group (-COOH) at one end.
Isoprenoids, also known as terpenoids, are a group of organic compounds made up of repeating isoprene (C5H8) units that are found in many organisms. They have a wide range of roles in biological systems, including serving as the precursors to steroids and other important signaling molecules.
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Related Questions
is 2Sb+3L2-> 2SbL3 endothermic or exothermic?
Answers
Answer:
try working out the bond enthalpies for both sides of the equation :)
Explanation:
Based on this experiment which substance has the highest specific heat capacity?
Select one:
a. lead
b. ice
c. granite
d. copper
Answers
plz mark brainlyest
if a chemist dilutes his 4.0 m stock solution to make a 250 ml of 0.033 m salt solution, how much stock does he need?
Answers
To make a 250 ml of 0.033 M salt solution, the amount of stock solution needed to dilute is 0.825 mL.
To find out how much stock solution the chemist needs, we can use the formula for dilution:
C1V1 = C2V2
where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
In this case, the chemist has a 4.0 M stock solution and wants to make a 0.033 M salt solution with a volume of 250 mL.
Plugging these values into the formula, we get:
(4.0 M)(V1) = (0.033 M)(250 mL)
To solve for V1, we divide both sides of the equation by 4.0 M:
V1 = (0.033 M)(250 mL) / 4.0 M
Simplifying, we find:
V1 = 0.825 mL
Therefore, the chemist needs 0.825 mL of the stock solution to make 250 mL of a 0.033 M salt solution.
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nitrous oxide was first discovered by a french psychiatrist who was attempting to develop a sedative agent to treat schizophrenic patients. True or False
Answers
Nitrous oxide was first discovered by a French psychiatrist who was attempting to develop a sedative agent to treat schizophrenic patients. This statement is false.
What is Nitrous Oxide?
Nitrous oxide is a colorless, odorless chemical compound and non-combustible gas at normal room temperature.
It is generally known as 'laughing gas' and its molecular formula is N2O.
Other characteristics of this gas include sweet, gentle smell and and slight sweet taste.
Simply put, nitrous oxide is the least non-toxic gas that is used for inhalational anesthetic purposes.
However, there are some mild side effects including dizziness and unconsciousness which occur after inhaling gas.
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What is the final temperature of a 27.2-gram wooden block that starts at 23.4 degrees celsius and loses 759 joules of energy? The specific heat capacity of wood is 1.716 joules/gram degree Celsius.
Answers
Answer:
The correct answer is 7.1 degree C.
Explanation:
Based on the given information, the initial temperature or To of the block is 23.4 degree C.
The energy lost or Q from the given wooden block is -759 J.
The specific heat capacity or c of the wood given is 1.716 J/g°C
The mass of the wooden block given is 27.2 grams.
There is a need to find the final temperature of the wooden block, for this the formula to be used is,
Q = m × c × (T-To)
Now by putting the given values in the formula we get,
-759 = 27.2 × 1.716 (T - 23.4)
T = 7.1 degree C.
Which feature forms at Earth's surface from the cooling of lava?
O extrusion
fault
O intrusion
unconformity
Answers
Extrusion is the feature form at Earth's surface from the cooling of lava.
What are extrusive igneous rocks?They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.
Characteristics of extrusive igneous rocksThese are rocks formed mainly by silicate minerals.Pyroclastics are the product of explosive volcanic eruptions and contain rock fragments of different origins, they can be of many shapes and sizes.Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.
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Answer:
A.
Explanation:
draw the product formed when the following starting material is treated with lda in thf solution at −78°c.
Answers
The product formed when the given starting material is treated with LDA (lithium diisopropylamide) in THF (tetrahydrofuran) solution at -78°C is the deprotonated form of the starting material, known as an enolate.
LDA is a strong base commonly used to deprotonate acidic hydrogens. In this case, when the starting material is treated with LDA in THF solution at a low temperature of -78°C, the LDA abstracts a hydrogen atom from the molecule. The most acidic hydrogen in this case is typically the alpha hydrogen (adjacent to the carbonyl group) of a ketone or aldehyde.
The reaction proceeds as follows:
\(\[\text{Starting material} \xrightarrow[\text{LDA, THF (-78°C)}]{\text{Deprotonation}} \text{Enolate}\]\)
The enolate is formed by the removal of the alpha hydrogen, resulting in the creation of a negatively charged carbon atom, which then reacts with the surrounding solvent or other electrophiles present in the reaction mixture. The enolate can undergo various reactions, such as nucleophilic addition or substitution, depending on the specific conditions and reagents present.
It's important to note that without further information about the specific starting material, a more detailed and specific product cannot be determined. The identity and structure of the starting material would greatly influence the outcome of the reaction and the subsequent reactions that could occur.
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A sample of 140.1 g of a noble gas occupies 40.75 L at 758 mm Hg and 23.0 °C. What is its molar mass? Use 3 significant figures. Identify the noble gas.
Answers
The noble gas with a molar mass of 80.0 g/mol is Krypton (Kr).
To find the molar mass of the noble gas, follow these steps:
1. Convert the given pressure to atmospheres: 758 mm Hg × (1 atm / 760 mm Hg) = 0.998 atm.
2. Convert the given temperature to Kelvin: 23.0 °C + 273.15 = 296.15 K.
3. Use the ideal gas law equation, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant (0.08206 L atm / mol K), and T is the temperature.
4. Rearrange the equation to solve for n: n = PV / RT.
5. Plug in the given values: n = (0.998 atm × 40.75 L) / (0.08206 L atm / mol K × 296.15 K) = 1.7515 mol.
6. Calculate the molar mass by dividing the mass of the gas by the number of moles: Molar mass = 140.1 g / 1.7515 mol = 80.0 g/mol (rounded to 3 significant figures).
The noble gas with a molar mass of 80.0 g/mol is Krypton (Kr).
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How is one way cities affect the natural food chain of the region?
Cities blocks the sun that producers need to survive.
Animals that relied on food sources in nature can come to depend on humans for food in urban areas.
Humans can cause some animals to become extinct, changing the food chain.
Cities can provide unlimited amount of water for animals in found in the food chain.
Answers
Answer:i think its Humans can cause some animals to become extinct, changing the food chain.
Explanation:
Which of the following statements does not describe the structure of an atom?
Answers
Answer:
The electron cloud is a small and compacted space around the nucleus.
Ms. Clark is teaching her class about how plants make food for themselves. On the board, she has written this: __________ + air + water = food for plants
Answers
Answer:
sunlight
Explanation:
how many molecules of water are needed to completely hydrolyze a polymer that is ten monomers long?
Answers
The number of the molecules of water are needed to completely hydrolyze the polymer that is ten monomers long is the 9 molecules of water.
A polymer can be defined as the macromolecule which is essentially is the combination of the many subunits. The Polymers will be break down into the monomers is called as the hydrolysis of the polymer, which is the reaction in which the water molecule will be utilize during the breakdown.
One water molecule is use to break the each bond present between the two adjacent monomers in the polymer during the hydrolysis. The ten-monomer of the long polymer that comprises the nine bonds because the two adjacent monomers are joined through the bond. Therefore, the nine water molecules are required to hydrolyze the ten monomers long polymer.
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List 4 functions of proteins.
1.
2.
3.
4.
Help !!
Answers
Answer:
List 4 functions of proteins.
1.Growth and Maintenance.
2.Balances Fluids.
3.Bolsters Immune Health.
4.Transports and Stores Nutrients.
three lab groups carried out an experiment to identify the concentration of sucrose in six solutions. each unknown solution (1-6) contained one of the following sucrose concentrations: 0.0 m, 0.2 m, 0.4 m, 0.6 m, 0.8 m, and -1.0 m. cubes of sweet potato (1 cm3) were soaked for 24 hours in each solution and weighed to determine the change in mass. each data entry represents the average of three sample replicates expressed as percent change in mass following a 24-hour soak in the unknown solutions. from the data provided, which unknown solution has a molarity that most closely reflects the molarity of sweet potato cells?
Answers
The observed mass increase was probably caused by the osmosis of water molecules from an unidentified solution.
Which definition of osmosis is the most accurate?
Osmosis is the "Movement of Solute Molecules from Lower Concentration to a Higher Concentration of Solution Across a Semipermeable Membrane," according to the right definition.
Examples of osmosis in biologyOsmosis is responsible for the soil's ability to absorb water. The concentration is greater in the plant roots than in the soil. Water enters the roots as a result. Osmosis has an impact on the plant's guard cells as well.What are diffusion and osmosis?Osmosis is the process by which solvent particles flow from a dilute solution to one that is more concentrated. Diffusion, in contrast, is the transfer of particles from a location of higher concentration to one of lower concentration.learn more about osmosis here
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What does every weak base have?
Answers
has a Acids Bases
HCl LiOH
HBr NaOH
HI KOH
HNO 3
4. Which of the following is true about used antifreeze?
OA. It can be treated just like new antifreeze
OB. It is not recycleable
OC. It can never be reused in a vehicle
OD. It often contains heavy metals
Answers
Answer:
D. It often contains heavy metals.
Explanation:
Used antifreeze should not be reused in a vehicle, it is not recyclable, and it should be disposed of properly because it often contains heavy metals, such as lead and copper, which can be harmful to the environment and human health. It should not be treated just like new antifreeze. It is important to check the antifreeze levels and quality regularly and replace it with fresh antifreeze as needed.
Do you think it’s important that forensics is categorized as a science? Why or why not?
Answers
in a typical reverse-phase lc procedure, decreasing the polarity of the mp will most likely have what effect on the peaks in the chromatogram? a. the plate height of the peaks will decrease b. tm for the system will increase c. the retention factors for all non-polar compounds will increase d. the resolution of the peaks will increase e. tm for the system will decrease f. the efficiency of the peaks will increase g. the retention times of the peaks will increase h. the retention times of the peaks will decrease
Answers
In a typical reverse-phase LC procedure, decreasing the polarity of the mobile phase will most likely have the following effects on the peaks in the chromatogram: The tm for the system will decrease, and the retention times of the peaks will increase. Option E, and G are correct.
When the polarity of the mobile phase decreases, the overall polarity of the system decreases as well, and the non-polar compounds will have a stronger affinity for the non-polar stationary phase, resulting in a decrease in tm. The retention times of the peaks will increase because the non-polar compounds will spend more time interacting with the non-polar stationary phase.
The other options are incorrect because: The plate height of the peaks will decrease: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The tm for the system will increase: This is the opposite of what happens when the polarity of the mobile phase decreases.
The retention factors for all non-polar compounds will increase: This is also the opposite of what happens when the polarity of the mobile phase decreases.
The resolution of the peaks will increase: This is not necessarily true and depends on the specific compounds being analyzed and the chromatographic conditions.
The efficiency of the peaks will increase: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The retention times of the peaks will decrease: This is the opposite of what happens when the polarity of the mobile phase decreases.
Hence, E. G. The tm for the system will decrease, the retention times of the peaks will increase is the correct option.
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A sphere of radius 0.457 m, temperature 32.2 ∘
C, and emissivity 0.924 is located in an environment of temperature 82.9 ∘
C. At what rate does the sphere (a) emit and (b) absorb thermal radiation? (c) What is the sphere's net rate of energy exchange? (a) Number (b) Number Units Units
Answers
a) The sphere emits thermal radiation at a rate of 139.75 Watts.
b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.
c) The sphere's net rate of energy exchange is 102.09 Watts.
What are the rates of thermal radiation emission, absorption, and net energy exchange for the sphere?To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.
a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:
Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))
Plugging in the given values:
Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)
Emitting Rate ≈ 139.75 Watts
b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:
Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))
Plugging in the given values:
Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)
Absorbing Rate ≈ 37.66 Watts
c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:
Net Rate = Emitting Rate - Absorbing Rate
Net Rate = 139.75 Watts - 37.66 Watts
Net Rate ≈ 102.09 Watts
Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.
Note: The units for all the rates are Watts.
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Why do the electron clouds around a central atom stay as far apart as possible?
Answers
Electron pairs around a central atom arrange themselves so that they can be as far apart as possible from each other. The repulsion between negatively charged electrons pairs in bonds or as lone pairs causes them to spread apart as much as possible
Explanation:
What is the value proposition for consumers that Takealot
excels at? How is this different from traditional (non-online)
retailers.Don’t Confuse Platforms with Ecosystems (INSEAD
Blog), December 202
Answers
Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.
Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.
Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.
Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.
This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.
Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.
The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.
In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.
They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.
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1. If 9.00 moles of Calcium Nitrate with excess Aluminum Carbonate in a double replacement reaction, how many moles of aluminum nitrate result from the reaction?
2.If I start with 25.0 grams of lead(ii) nitrate how many grams of sodium nitrate will be produced?
3.If I start with 89.0 grams of sulfuric acid and produce 7.10 grams of water, what is my percent yield?
4.14.0 grams of sodium metal are combined with an aqueous solution containing 21.0 grams of iron (ii) phosphate in a single replacement reaction. given the balanced chemical equation=6Na+Fe(PO4)2-->2Na3PO4+3Fe. What is the limiting reactant and how much metallic iron is produced?
Answers
Branches of Chemistry Traditionally, the five main branches of chemistry are organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry. However, sometimes biochemistry is considered a subdiscipline of organic chemistry.
Write the correct abbreviation for each metric unit.
1) Kilogram __ 4) Milliliter __ 7) Kilometer __ 2) Meter 5) Millimeter __
8) Centimeter __ 3) Gram __ 6) Liter __ 9) Milligram __
Answers
The correct abbreviation for each metric unit is:
Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g, Liter - L, and Milligram - mg.
What is the metric system?The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter. Each of the fundamental dimensions can be expressed by a single base unit of measure.
For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.
Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.
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Chemical Reactions/Neutralization Reactions
Predict the products of the following neutralization reactions by completing the word equations. Then write a balanced chemical equation for each reaction.
1. Hydrobromic acid + Sodium hydroxide
2. Phosphoric acid + Potassium hydroxide
3. Iodic acid + Ammonium hydroxide
4. Hydrophosphoric acid + Calcium hydroxide
5. Sulfurous acid + lithium hydroxide
6. Hypofluorous acid + barium hydroxide
7. Nitric acid + beryllium hydroxide
Answers
Answer:
Hydrochloric acid + sodium hydroxide -> sodium chloride + water
Sulphuric acid + copper hydroxide -> copper sulphate + water
Nitric acid + sodium hydroxide -> sodium nitrate + water
Hydrochloric acid + calcium hydroxide -> calcium chloride + water
Sulphuric acid + potassium hydroxide -> potassium sulphate + water
Hydrochloric acid + lithium hydroxide -> lithium chloride + water
Nitric acid + magnesium hydroxide -> magnesium nitrate + water
titrations worksheet answer key it takes 83 ml of a 0.45 m naoh solution to neutralize 235 ml of an hci solution. what is the concentration of the hci solution?
Answers
Thus, the concentration of the HCI solution is 0.157 mol/L.
To find the concentration of the HCI solution, we need to use the balanced equation for the reaction between NaOH and HCI:
NaOH + HCI → NaCl + H2O
From the equation, we know that one mole of NaOH reacts with one mole of HCI to produce one mole of NaCl and one mole of H2O. Therefore, we can use the following equation to calculate the number of moles of NaOH used to neutralize the HCI solution:
0.45 mol/L NaOH × 0.083 L NaOH
= 0.037 mol NaOH
Since one mole of NaOH reacts with one mole of HCI, the number of moles of HCI in the 235 mL of HCI solution can be calculated as follows:
0.037 mol NaOH ÷ 0.235 L HCI
= 0.157 mol/L HCI
In summary, we used the balanced equation for the reaction between NaOH and HCI to calculate the number of moles of NaOH used to neutralize the HCI solution. From there, we used the mole ratio to calculate the number of moles of HCI in the solution and determined the concentration of the HCI solution to be 0.157 mol/L.
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The density of lead is 11.4g/cm^3. the mass of a lead ball with a radius of .50mm is?
Answers
The mass of a lead ball with a radius of .50mm is 5.9714226×\(10^{6}\) g
A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. The formula for density is mass divided by volume.
ρ = m/v
For, v = 4/3π\(r^{3}\)
v = 4/3×3.14×\(50^{3}\)
v = 523,809 \(cm^{3}\)
As, density = mass / volume
11.4 = mass / 523,809
mass = 5971422.6 g
mass = 5.9714226×\(10^{6}\) g
So, the mass of a lead ball with a radius of .50mm is 5.9714226×\(10^{6}\) g
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Write the skeleton equation:
Cobalt and Sulfur react to produce Cobalt (II) Sulfide
Answers
Answer:
Co + S = Co2S3
Explanation:
pretend = is the arrow
True or Flase: dissolving salt in distilled water creates a homogeneous mixture.
Answers
Answer:
true
Explanation:
Answer:
true
Explanation:
because the dissolved salt is evenly distributed throughout
Over the past week, Anna has been very curt with shondra, and when she ask if she has done something to offend her, Anna tersely replies, "no, everything is fine" what should shondra do
Answers
Answer:
A. avoid talking to Anna altogether and stay out of her way
B. ask her manager for advice
C. check with Gary to see if there is any gossip about what's going on with Anna
D. take a curt approach of her own to show Anna how it feels
Explanation:
ANSWER: B.
difference between velocity and acceration
Answers
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