The state of matter is dependent on the intermolecular forces of attraction and this is the case of Nitrogen which is gas and has Vander Waal's force of attraction while water, a liquid molecule has hydrogen bonding.
What is the interaction between molecules?Molecular interaction occurs between molecules or atoms which are linked by bonds. These interactions include repulsive and cohesive forces. An interaction is cohesive when the attraction force between molecules are of alike nature. It is repulsive for unlike molecules.
Intermolecular forces are the attractive and repulsive forces between molecules. The presence of Vander Waal's force in Nitrogen and hydrogen bond in water makes it repulsive.
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Context: find how much vinegar and baking soda needed to fill 750 ml plastic bag with CO2. How do I calculate how much vinegar I need. Answer should be around 35-40 grams
The mass of vinegar required to react with baking soda to produce 750 mL of CO₂ is 2.01 g.
How much vinegar is needed to produce enough CO₂ to fill a 750 mL plastic bag?The mass of vinegar required to produce 750 mL of CO₂ is calculated as follows:
Equation of reaction: CH₃COOH + NaHCO₃ ---> CH₃COONa + H₂O + CO₂
From the equation of the reaction, 1 mole of vinegar, CH₃COOH reacts with 1 mole of baking soda to produce 1 mole of CO₂.
Assuming the reaction takes place at STP conditions, the volume of 1 mole of CO₂ is 22400 mL.
Mooles of CO₂ in 750 mL will be 750 * 1 mol/22400 = 0.0335 moles
Moles of vinegar required will then be 0.0335 moles
Molar mass of vinegar = 60 g/mol
Mass of 0.0335 moles of vinegar will be 60 * 0.0335 moles = 2.01 g
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throughout the extraction steps of this week's oxidation reaction procedure, which of the following compound(s) is/are present in the bottom layers? group of answer choices sodium acetate sodium chloride and sodium acetate 9-fluorenone sodium chloride
The organic phase is a solvent, usually dichloromethane or diethyl ether, that disperses very little in water. The 9-fluorenone was dried, isolated, and saltified with sodium sulfate.
What are the three primary types of extraction techniques?There are a number of extraction processes, including solvent extraction, distillation, pressing, and sublimation, that can be used. Solvent extraction is the method that is most frequently used.
What kind of extraction is most typical?extracting liquid from liquid When a substance is "extracted," it is moved from a solid or liquid into a separate solvent or phase. The method most frequently used in chemical labs is liquid-liquid extraction, which takes place in a separatory funnel.
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weather is created by differences in ________and________
Weather is created by differences in air pressure and temperature and moisture.
What causes weather?Six main factors make up the weather. These include the following: temperature, atmospheric pressure, the development of clouds, wind, and precipitation. A minor modification to any of these elements may result in a new weather pattern. Every variation in the weather has a cascading effect that affects everyone on the planet.
The sun only warms half of Earth at a time, leaving the other side in shadow. As a result, the sun heats the surface of the Earth unevenly each day, heating some areas more than others. Winds, clouds, and precipitation are all brought on by these temperature differences.
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How does the balanced equation relate to the law of conservation of matter?
Answer:
The law of conservation of mass states that matter cannot be created or destroyed. If we have an unbalanced equation, atoms are either destroyed or created, which totally violates this law
g starting with toluene which sequence of reactions below works best to prepare the following cyclohexadiene compound
The toluene which sequence of reactions below works best to prepare the following cyclohexadiene compound is given as :
NBS , heat NaOCH₃ Na, NH₃
Toluene ------------------> -----------------> ------------>
CCl₄ CH₃OH CH₃OH
The substituted aromatic hydrocarbon is the toluene compound. . the cyclohexadiene is used as the initial material for the synthesis of the many natural complex products. the cyclohexadiene can be formed by the toluene . the synthesis which is the best to prepare the cyclohexadiene from the compound that is toluene is given as follows :
NBS , heat NaOCH₃ Na, NH₃
Toluene ------------------> -----------------> ------------>
CCl₄ CH₃OH CH₃OH
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how might the properties of the air masses change when its late july(summer)
Answer:
Moving from one environment to another causes it to change
Which image shows the correct way of lining up vectors to add them
together?
O A.
OB.
O C.
O D.
For the molecule, GeO2, determine its Lewis structure, bonding pairs/lone pairs, electron geometry, its shape, and whether or not the molecule is polar.
The correct answers to the problem given above about germanium IV oxide are as follows:
a. The Lewis structure of the molecule; GeO₂ simply is O = Ge = Ob. The bonding pairs/lone pairs of the molecule GeO₂ are two bond electron pairs and four electrons respectively.c. The electron geometry of GeO₂ is linear geometry d. The shape of germanium IV oxide is α-quartz type hexagonal structuree. Germanium oxide is a polar molecule.What is meant by GeO₂GeO₂ is a chemical compound also known as germanium oxide, germanium dioxide or germanium IV oxide. It is a polar covalent which is a soluble substance to some extent.
In conclusion, it can be deduced from the explanation given above that germanium IV oxide is a chemical compound.
The complete lewis structure of germanium IV oxide is attached.
Complete question:
Answer the following questions about germanium IV oxide, GeO₂
a. Determine its lewis structure.
b. Its bonding pairs/lone pairs
c. What is its electron geometry (GeO₂)?
d. Its shape (GeO₂)?
e. Is germanium IV oxide a polar or non-polar molecule?
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what is the maximum number of electrons (in a single atom) that can be associated with each of the following combinations of quantum numbers?
The maximum number of electrons that can be associated with each of the following combinations of quantum numbers :
a) n = 7, l= 6 is 26 electrons
b) n = 4 , l = 3, ml = +3 is 2 electrons
The maximum number of the electrons in the given set of quantum numbers is given as follows :
a) n = 7 and l = 6
m = -l to + l
total values of m = 2l + 1
= 2 ( 6 ) + 1
= 13 values
that means we have 13 orbitals corresponding to the values of n = 7 and l = 6
so, the maximum number of electrons = 13 × 2
= 26 electrons
b) n = 4, l = 3 and m = + 3
here the value of m is given, this means that we have uniquely identified an orbital. an orbital can have maximum two electrons.
therefore, the maximum number of the electrons = 2
The question is incomplete , the complete question is :
The maximum number of electrons that can be associated with each of the following combinations of quantum numbers :
a) n = 7, l= 6
b) n = 4 , l = 3, ml = +3
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In a specific molecule, there are 21 continuous conjugated bonds (each 140 pm in length) . You can assume this system can be approximated by a one-dimensional particle in a box (particle on a line). How much energy would be required to promote an electron from the n = 11 level to the n= 12 level?
3.7*[tex]10^{-20}[/tex] J energy would be required to promote an electron from the n = 11 level to the n= 12 level.
According to particle in a box model energy is
E=[tex]\frac{n^{2} }{8ml^{2} } h^{2}[/tex] where n = no of energy level = 10
h is Planck constant, m is mass of electron= 9.1*[tex]10^{-31}[/tex]kg
and l is length of box= 140pm= 140*[tex]10^{-10}[/tex] m.
so E =3.7*[tex]10^{-20}[/tex]J.
What is particle in a box model?
The particle in a box model, sometimes referred to as the infinite potential well or the infinite square well, in quantum mechanics depicts a particle that is free to travel in a constrained area enclosed by impenetrable barriers.
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An ion has the following Lewis structure where X is an unknown element.Which of the following elements could be X?N As F P Cl Br
The correct option is Br, Cl
What are halogens?
Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and Tennessee are the five or six chemically related elements that make up the halogens group in the periodic table (Ts). Group 17 is the name given to this group in the current IUPAC nomenclature.
The definition of "halogen" is "salt former" (or "salt maker"). Silver bromide, potassium iodide, calcium fluoride, and sodium chloride are just a few of the compounds that are created when halogens combine with metals.
There are other families of halogen oxides that are known to form various anions, including the one shown in the figure attached to the question but which I am unable to reproduce here.
Chlorine, bromine, and iodine frequently combine to create these anions. When the halogen's octet expands, these anions are created. This suggests that the halogen's outermost shell now has more than eight electrons.
Hence, Br and Cl are the correct option
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Question 2(Multiple Choice Worth 2 points)
(01.02 MC)
A team of researchers is working on a project to make a new kind of carbonless fuel. During their experiment, there is an explosion that destroys the lab. While they
are cleaning the debris, they discover three pieces of frozen metal. The researchers were excited to report that they had discovered a fuel that burns so clean it
becomes cold. Which statement best explains why this scenario represents "bad" science?
O The frozen metal was discovered through biased research practices.
O The clean fuel experiment lacks controlled variables due to the explosion.
O
The experiment is replicable because the testing conditions are included.
O
The result of clean fuel production, the frozen metal, is not observable.
They shouldn't have made a choice based on the frozen metals because scientific research is based on accepted procedures, not on personal bias.
Briefing:
A researcher that is biased is unable to look at experimental observations objectively before drawing any conclusions. Bias is the biggest trap that needs to be avoided when performing a scientific investigation.
When there is a discrepancy between the observation and interpretation of data in a scientific investigation, a bias is introduced.
In the instance of this inquiry, the researchers were already interested in determining whether it was possible to obtain a fuel without carbon. They reached a lobe-sided, unscientific conclusion because they forgot to fully study the chunks of frozen metal since their brains were so clouded by this bias.
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Density is a common physical property of substances that can give insight into the structure of the substance on the atom or molecular level. You are attempting to measure the thickness of a rectangular piece of aluminum found at a crime scene, but it is too thin for your ruler. You know density has units of g/mL, and you recall mL is the same as cm?. Sooo...why not use the volume of the metal, the length and height? to find the volume by water displacement, you lower the sample into a graduated cylinder with an initial volume of water of 32.9 ml. the volume of water rises to 48.1 ml. you also mass the sample and determine it to be 20.28 g. finally, you measure the length of the solid to be 6.5 cm and the height to be 5.1 cm. from this information determine the thickness of the metal rectangular solid(mm).
The length of the solid to be 6.5 cm and the height to be 5.1 cm. the thickness of the metal rectangular solid(mm) is 4.58 mm.
given that :
height of solid = 5.1 cm
length of solid = 6.5 cm
the initial volume of graduated cylinder = 32.9 mL
the final volume of graduated cylinder = 48.1 mL
the volume of the solid = 48.1 - 32.9
= 15.2 mL = 15.2 cm³
the volume expression for the solid is given as :
volume = length × width × height
15.2 cm³ = 6.5 cm × width × 5.1
width = 15.2 / 33.15
Width = 0.458 cm = 4.58 mm
Thus, the thickness of metal = 4.58 mm
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Calculate the wavelength and frequency and energy in joules pee mole of an electron that undergoes a transition from level n=2 to level n=1
The wavelength is same.
What is wavelength?Wavelength can be defined as the distance between two successive crests or throughs of a wave.
The question wants you to determine the energy that the incoming photon must have in order to allow the electron that absorbs it to jump from 2 to 1.
A good starting point here will be to calculate the energy of the photon emitted when the electron falls from 1 to 2
by using the Rydberg equation.
1/π = R
λ
si the wavelength of the emittted photon R
is the Rydberg constant, equal to 1.907.
This means that you haveλ=
4.10
So, you know that when an electron falls from
to
a photon of wavelength
410 nm
is emitted. This implies that in order for the electron to jump from the 2 to 1
, it must absorb a photon of the same wavelength.
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Which of the following statements are true regarding types of stem cells
I. Totipotent stem cells can only become tissues of the body
II. Multipotent stem cells are found in adults and stay dormant until needed
III. Meristematic stem cells are only found in plants
IV. Pluripotent stem cells can become tissues of the body and the placenta
A. II, III, and IV
B. II and III
C. II and IV
Answer:
The answer is A. II, III and IV
What is the number of moles in 3.0 X 10^24 atoms of Carbon
Answer:the number of moles represented by 3.0 x 10^24 atoms of Ag is 0.500mol 0.500 m o l .
Explanation:
What mass of phosphate ions are present in 25.8 g of tin (IV) phosphate?
The mass of phosphate ions are present in 25.8 g of tin (IV) phosphate is 13.3 g/mol.
What is phosphate ?An anion, salt, functional group, or ester produced from phosphoric acid is referred to as a phosphate in chemistry. Most frequently, it refers to orthophosphate, a product of orthophosphoric acid H 3PO 4. The elimination of three protons H+ results in the formation of the phosphate or orthophosphate ion [PO 4]3 from phosphoric acid.
Phosphate in excess can be harmful. It can impair the body's utilization of iron, calcium, magnesium, and zinc and result in diarrhea, calcification (hardening) of organs and soft tissue.
25.8 g of Sn₃(PO₄)₄
mol.wt of Sn₃(PO₄)₄ is 736.015
no. of mole of Sn₃(PO₄)₄= 25.8/736.015 moles
Sn₃(PO₄)₄ has 3 Sn⁴⁺ and 4(PO₄)³-
so, no. moles of (PO₄)³- = 4 * 0.0351
= 0.1402
mol.wt of (PO₄)³- is 95g/mol
mole = wt/ mol.wt
wt = 0.1402 *95
= 13.3 g/mol
Thus, The mass of phosphate ions are present in 25.8 g of tin (IV) phosphate is 13.3 g/mol.
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The enthalpy change for the following reaction is -318 kJ. Using bond energies, estimate the O-F bond energy in OF2(g). OF2(g) + H2O(g) -> O2(g) + 2HF(g)
The enthalpy change for the following reaction is -318 kJ. Using bond energies, estimate the O-F bond energy in OF₂(g).
OF₂(g) + H₂O(g) -> O₂(g) + 2HF(g) is 190 kJ /mol.
The reaction is given as :
F - O - F + H - O - H -----> O = O + 2H - F
moles bond energy
bond broken H - O 2 463 kJ/mol
bond broken O - F 2 ?
bond form O = O 1 498 kJ/mol
broken form H - F 2 565 kJ/mol
enthalpy change = BE ( bond broken ) - BE (bond form )
- 318 = (2 (O - F) + 2(463) - (( 498 ) + 2( 565))
- 318 = 2 (O - F) - 698
2 (O - F) = 380
(O - F) = 190 kJ /mol
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Calculate pH and pOH
Calculate pH and pOH for each of the following solutions at 25°C
a. 1.0×10-³ MOH⁻
b. 1.0 MH⁺
Part a
[tex]\text{pOH}=-\log(1.0 \times 10^{-3}})=\boxed{3}\\\\\text{pH}+\text{pOH}=14 \implies \text{pH}=\boxed{11}[/tex]
Part b
[tex]\text{pH}=-\log(1.0)=\boxed{0}\\\\\text{pOH}+\text{pH}=14 \implies \text{pOH}=\boxed{14}[/tex]
Which of the following coenzymes participate in the reactions of the pyruvate dehydrogenase complex? 1. thiamine pyrophosphate (TPP) 2. lipoic acid (lipoamide) 3. Flavin adenine dinucleotide (FAD) 4. Nicotinamide adenine dinucleotide (NAD) 5. Coenzyme A (CoA) View Available Hint(s)All of the listed coenzymes participate. O Only 1,2, and 4 participate. O Only 1,2, and 3 participate. O Only 1, 3, and 5 participate. Submit
The right answer is E.
The decarboxylation of pyruvate to acetyl-CoA and the production of NADH and CO2 are irreversible reactions that are catalyzed by the multi-enzyme complex known as pyruvate dehydrogenase. Pyruvate is introduced into the TCA cycle through the complex.
Two regulatory enzymes, three catalytic enzymes, and a binding protein make up the enzyme complex. There are three enzymes:
1. Thiamine pyrophosphate (TPP) is used as the prosthetic group by pyruvate dehydrogenase (E1).
2. Dihydrolipoyl transacetylase (E2), which has as its prosthetic groups coenzyme A and lipoamide.
3. Nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (FAD) serve as cofactors for dihydrolipoyl dehydrogenase (E3).
Hence, The correct response is option E since E2 needs coenzyme A as one of its co-factors.
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which of the following are considered biofuels? select all that apply. check all that apply cellulosic ethanolcellulosic ethanol grain ethanolgrain ethanol methane from sewage and manuremethane from sewage and manure natural gas from shalenatural gas from shale biodiesel from soybean oilbiodiesel from soybean oil wind energy wind energy coal
The cellulosic ethanol cellulosic ethanol grain ethanol grain ethanol methane are considered biofuels. The two most common biofuels used today are ethanol and biodiesel.
Both of which are the first generation biofuel technologies. The BETO is working with industry to develop next-generation biofuels from waste, the cellulosic biomass, and algae-based resources. Ethanol (often derived from corn in the United States and sugarcane in Brazil), biodiesel (derived from vegetable oils and liquid animal fats), green diesel (derived from algae and other plant sources), and the biogas are examples of the biofuels (methane derived from animal manure and other digested organic material).
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Lavasha's backpack holds up to 14.75 kilograms. What is this mass expressed in grams?
O 14750 g
0.01475 g
1.475 g
O 1475 g
The mass expressed in grams was 0 14750 g.
what is a gram?
A gram is the SI unit of weight in the metric system, and it is frequently abbreviated as "g."A common unit of mass or weight is the pound.Using this metric, we can convert grams to kilograms.The metric units of mass or weight are kilogram and gram.The global measurement norm is the International System of Units (SI), sometimes referred to as the metric system.The definition temperature (0 °C), which was originally altered to 4 °C, the temperature of maximum density of water, was first used in 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre and at the temperature of melting ice."To learn more about gram refer to
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write the formula for compounds formed from these pairs of ions. a) nh4 , so32- b) calcium ion, phosphate ion
The compound that is formed from the combination of NH₄⁺ and SO₃²⁻ is (NH₄)₂SO₃ and the compound that is formed from the combination calcium ion and phosphate ion is Ca₃(PO₄)₂.
Definition of Ionic bond
A bond that is formed by the complete transfer of some electrons from one atom to another is known as an ionic bond. The atom which loses one or more electrons becomes a cation—a positively charged ion. The atom which gains one or more electron becomes an anion—a negatively charged ion.
The term "ionic bonding" is given "when the ionic character is greater than the covalent character".
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Determine the mass in grams of 7.68 x 10^21 atoms of carbon. (The
mass of one mole of carbon is 12.01 g.)
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the mass in gram of 7.68 x 10²¹atoms of carbon is 0.152g.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of carbon=7.68 x 10²¹atoms
Substituting the values
mole= =7.68 x 10²¹÷ 6.022×10²³
mole = 0.0127moles of carbon
number of moles of carbon=given mass of carbon÷ molar mass of carbon
Substituting the values
0.0127= mass of carbon÷12.01g
mass of carbon= 0.152g
Therefore, the mass in gram of 7.68 x 10²¹atoms of carbon is 0.152g.
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What is the significance of the half-life of a radioisotope?
A. It tells how long a radioisotope sample is considered dangerous.
B. It tells what kind of radioactivity is released through radioactive
decay.
C. It tells how much energy is released over the lifetime of a
radioactive sample.
D. It tells what fraction of a radioactive sample remains after a
certain length of time.
Answer:
D) It tells what fraction of a radioactive sample remains after acertain length of time.
Explanation:
to determine the unknown concentration of copper ions in solution, you will first prepare a calibration curve. the calibration curve plots
Use equation: (C=m/V). Now, the known concentration of copper(ll) ion solution and a colorimeter to produce a cu(ll) ion conc./absorbance calibration curve. you will be able to read its conc. from the curve.
How is titration used to determine an unknown concentration?A titration is a technique in which a solution of known concentration is used to determine the concentration of an unknown solution. The titrant (the known solution) is added from a buret to a known quantity of the analyte (the unknown solution) until the reaction is complete.
What is the use of calibration curve?A calibration curve is a way to identify the concentration of an unknown compound. These curves use data points of known compounds at varying concentrations, and researchers or developers can use these curves to find where an unknown substance plots.
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CH4, has a mass of 38.25 g. Calculate the number of methane molecules
Answer:
1.43 x 10^24 molecules
Explanation:
Molecular mass of methane = 12.01 + 4(1.01) = 16.05 g/mol
so mol of 38.25 g equals 38.25g x (1 mole/16.05g = 2.38 mol
1 mole = 6.022 x 10^23 molecules
so 2.38 mol will have 2.38 x 6.022 x 10^23 = 1.43 x 10^24 molecules
A gas is transported in a horizontal pipeline at a flow of 10.000 lb.„/min. If it is moving at 10 ft.'s, what rate of work (in horsepower) must be performed on the gas to increase its velocity to 200 ft/s at the same temperature and pressure (I hp 550
A gas is transported in a horizontal pipeline at a flow of 10.000 lb.„/min. If it is moving at 10 ft.'s, -6045 HP rate of work (in horsepower) must be performed on the gas to increase its velocity to 200 ft/s at the same temperature and pressure
What is rate of work?This equation may be used to compute work: Work equals Force x Distance. The Newton metre is the SI unit for work (N.m). One joule is the amount of work done when one Newton of force pushes an item one metre.
Because the force transmits one unit of energy when it does one unit of work, the rate of accomplishing work equals the rate of utilising energy. A horsepower is equivalent to 550 foot pounds per second, while a kilowatt is equal to 1000 watts.
Given that,
A gas is transported in a horizontal pipeline at a flow of 10.000 lb/min
m = (10000÷60) lb/sec
m = 166.67 lb/sec
and, v₁ = 10 ft/sec
v₂ = 200 ft/sec
Now,
or, m [(v₂² - v₁²)/2] = - w
or, w = m/2 × [(v₁² - v₂²)]
or, w = 166.67/2 × [(10)² - (200)²]
or, w = -3325000 lb. ft².s⁻¹
or, w = -3325000 / 550 HP
or, w = -6045 HP
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what is the density of a box that is 2cm x 4cm x 10cm and has a mass of 120g
Answer:
To find the density of a box, you will need to divide its mass by its volume. The density of an object is a measure of how much mass is contained in a given volume.
The volume of the box can be calculated by multiplying its length, width, and height:
volume = 2 cm x 4 cm x 10 cm = 80 cm^3
To find the density of the box, you will need to divide its mass by its volume:
density = mass / volume
= 120 g / 80 cm^3
= 1.5 g/cm^3
Therefore, the density of the box is 1.5 g/cm^3.
Pancreatic amylase is digestive enzyme found in the small intestine: It helps break down large starch molecules later in the digestive process Pancreatic amylase is unable to break down lipids Which of the following best explains why pancreatic amylase is able to break down starches, but not lipids? enzymes bind only to their specific substrates lipids are too hydrophobic to be broken down by enzymes. enzymes denature in the presence of lipids lipids are too small to bind to enzymes
Pancreatic amylase is able to break down starches, but not lipids because enzymes bind only to their specific substrates.
Pancreatic amylase is the enzyme secreted by pancreas. One of the important features of all the types of enzymes is the substrate specificity. It ensures that enzyme perform the chemical reaction they are specifically intended to do.
We also see salivary amylase secretion in the mouth which begins the breakdown process of our food. It is again directed towards carbohydrates for instance starch. Lipids are digested by emulsification and proteins are digested by breakdown through peptidases.
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