The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy E_a = 30.0 kJ/mol. If the rate constant of this reaction is 5.0 times 10^4 M^-1 s^-1 at 201.0 degreeC, what will the rate constant be at 172.0 degreeC?
Answers
The Arrhenius equation for the temperature dependence of the rate constant for a reaction is given by the equation:k = Ae^(-Ea/RT)where k is the rate constant, A is the frequency factor (or pre-exponential factor), Ea is the activation energy, R is the gas constant (8.314 J K-1 mol-1), and T is the temperature in Kelvin (K).
The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy Ea = 30.0 kJ/mol. If the rate constant of this reaction is 5.0 x 104 M-1 s-1 at 201.0°C, what will the rate constant be at 172.0°C?Solution:We know that the rate constant k obeys Arrhenius equation, so:k = Ae^(-Ea/RT)where k is the rate constant, A is the frequency factor (or pre-exponential factor), Ea is the activation energy, R is the gas constant (8.314 J K-1 mol-1), and T is the temperature in Kelvin (K).
Let's convert the temperatures into Kelvin:201.0°C = 474.15 K172.0°C = 445.15 KWe know that the rate constant k of the reaction at 201.0°C is 5.0 x 104 M-1 s-1. Substituting these values into the Arrhenius equation, we get:k = Ae^(-Ea/RT)5.0 x 104 M-1 s-1 = Ae^(-30000 J mol-1 / (8.314 J K-1 mol-1 × 474.15 K))Now we can solve for A. Multiplying both sides of the equation by e^(30000 J mol-1 / (8.314 J K-1 mol-1 × 474.15 K)), we get:A = k × e^(Ea/RT)A = (5.0 x 104 M-1 s-1) × e^(30000 J mol-1 / (8.314 J K-1 mol-1 × 474.15 K))A = 1.28 x 1014 M-1 s-1We can now use this value of A to find the rate constant k at 172.0°C:k = Ae^(-Ea/RT)k = (1.28 x 1014 M-1 s-1) × e^(30000 J mol-1 / (8.314 J K-1 mol-1 × 445.15 K))k = 1.11 x 104 M-1 s-1So the rate constant of the reaction at 172.0°C is 1.11 x 104 M-1 s-1.
To know more about temperature visit :
https://brainly.com/question/14532989
#SPJ11
Related Questions
This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE): CH3OCCH33 A chemical engineer has determined by measurements that there are 9.6 moles of hydrogen in a sample of methyl tert-butyl ether. How many moles of oxygen are in the sample
Answers
There are 7.2 moles of oxygen in the given sample of MTBE. This is calculated based on the fact that each mole of MTBE contains 3 moles of oxygen and 4 moles of hydrogen.
Based on the chemical formula for methyl tert-butyl ether (MTBE), we can see that there are 3 atoms of oxygen in each molecule of MTBE. Therefore, if we have 9.6 moles of hydrogen in a sample of MTBE, we can calculate the number of moles of oxygen in the sample as follows: For every mole of MTBE, there are 3 moles of oxygen. So, if we have 9.6 moles of hydrogen, we must have consumed 9.6/4 = 2.4 moles of MTBE (since each mole of MTBE contains 4 moles of hydrogen).
Therefore, the number of moles of oxygen in the sample is:
2.4 moles MTBE x 3 moles oxygen/mole MTBE = 7.2 moles oxygen
So, there are 7.2 moles of oxygen in the sample of MTBE.
Learn more about chemical: https://brainly.com/question/29240183
#SPJ11
What is the molarity of a sodium hydroxide solution if 25 mL of the solution is neutralized by 69.5 mL of 1.5 M HCl?
Answers
Answer:
4.17M
Explanation:
m1v1/m2v2=n1/n2
25cm3 of 0.2mol/dm3 barium hydroxide solution reacted with 22.8cm3 hydrochloric acid. Calculate the concentration of the hydrochloric acid in mol/dm3. Ba(OH)2 + 2HCl BaCl2 + 2H2O
Answers
Explanation:
1 mol of Ba(OH)2 = 2 moles of HCl
Which type of plant used light, feathered seeds?
What would a zebra be?
consumer
decomposer
producer
Answers
Answer:
Zebra- consumer
Tiger- consumer
Worm- decomposer
Tree-Producer
Molded bread- decomposer
Plant- producer
Answer:
Type of plant - Dandelion .Zebra is a Consumer .Explanation:
Dandelion plant produces light and feathery seeds .
Zebra consumes / eats grass so it is a consumer .
Phospholipid molecules that prevent the alveoli from collapsing are known as ______. A) laryngitis. B) surfactant. C) mucus. D) plasma.
Answers
B) Surfactant is a phospholipid molecule that prevents alveoli from collapsing. It reduces surface tension in the lungs, allowing the alveoli to remain open and facilitating efficient breathing.
Phospholipid molecules that prevent the alveoli from collapsing are known as surfactants. Surfactant is a substance composed of phospholipids, proteins, and other components. It is produced by specialized cells in the lungs called type II alveolar cells.
The primary function of surfactant is to reduce the surface tension within the alveoli, which are tiny air sacs in the lungs where gas exchange takes place. Without surfactant, the surface tension would be too high, causing the alveoli to collapse during exhalation. Surfactant molecules disrupt the cohesive forces between water molecules on the alveolar surface, allowing the alveoli to remain open and preventing them from sticking together. The presence of surfactant is crucial for efficient breathing and maintaining lung function. In conditions where surfactant production is reduced or absent, such as in premature infants or certain lung diseases, respiratory distress syndrome and other breathing difficulties can occur.
learn more about phospholipid here:
https://brainly.com/question/20561742
#SPJ11
TRANSLATING WORD EQUATIONS:
PRACTICE ASSIGNMENT
Write balanced chemical equations for each of the following scenarios and identify the
type of reaction.
1. Liquid water added to solid calcium oxide produces aqueous calcium hydroxide.
Type:
H₂O toca (99) Call₂OH
2. Aqueous iron (III) chloride and sodium carbonate solution yields aqueous sodium
chloride and a precipitate of iron (III) carbonate.
Type:
(aq) Fe, CI H + 5 C03 SCIH -- fez coz
3. When fluorine gas is put in contact with calcium metal at high temperatures, calcium
fluoride powder is created.
Type:
F) + CF
Answers
Answer:
When calcium oxide (chemical formula: CaO) reacts with water (chemical formula: H
2
O), the following reaction takes place:
CaO+H
2
O→Ca(OH)
2
he product of this reaction is calcium hydroxide, also known as slaked lime.
Thus, when calcium oxide reacts with water, slaked lime is produced.
Calcium oxide is also known as lime and is most commonly used for many purposes. It can be used for pH correction of water or for its disinfection (with excess lime). More importantly, lime has been used for a very long time to produce calcium carbonate by reaction with carbon dioxide. Calcium carbonate has been used as mortar for sealing the gaps between bricks, stones, etc.
The reaction for the production of calcium carbonate is:
CaO+CO
2
→CaCO
3
In reality the reaction is a two-step process, with formation of slaked lime in the first step and reaction of slaked lime with carbon dioxide to form calcium carbonate in the second.
Explanation:
how many atoms of hydrogen are in 230 g of hydrogen peroxide (h2o2)?
Answers
There are approximately 8.128 × 10^24 atoms of hydrogen in 230 g of hydrogen peroxide (H2O2).
The molar mass of H2O2 can be calculated by adding the atomic masses of its constituent elements: two hydrogen (H) atoms and two oxygen (O) atoms. The atomic mass of hydrogen is approximately 1.008 g/mol, and the atomic mass of oxygen is about 16.00 g/mol.
Molar mass of H2O2 = (2 * atomic mass of H) + (2 * atomic mass of O)
= (2 * 1.008 g/mol) + (2 * 16.00 g/mol)
= 2.016 g/mol + 32.00 g/mol
= 34.016 g/mol
Now, we can calculate the number of moles of H2O2 in 230 g of H2O2 by dividing the given mass by the molar mass:
Number of moles = Mass / Molar mass
= 230 g / 34.016 g/mol
≈ 6.7622 mol
Since there are two hydrogen atoms in one molecule of H2O2, we can calculate the number of atoms of hydrogen by multiplying the number of moles by Avogadro's number (6.022 × 10^23 atoms/mol): Number of atoms of hydrogen = Number of moles of H2O2 * Avogadro's number * 2
= 6.7622 mol * 6.022 × 10^23 atoms/mol * 2
≈ 8.128 × 10^24 atoms
To learn more about Avogadro's number, click here: brainly.com/question/28812626
#SPJ11
what was niels bohr's explanation for the observation of atomic spectra?
Answers
Niels Bohr's explanation for the observation of atomic spectra was based on his atomic model, known as the Bohr model or Bohr's theory of atomic structure.
According to Bohr's model, electrons orbit the nucleus of an atom in specific energy levels or shells. Each energy level has a fixed amount of energy associated with it. When an electron transitions between energy levels, it either absorbs or emits a specific amount of energy in the form of electromagnetic radiation.
Bohr proposed that the energy of the emitted or absorbed radiation corresponds to the difference in energy between the initial and final energy levels of the electron. This energy difference determines the frequency or wavelength of the emitted or absorbed electromagnetic radiation. Thus, each transition between energy levels results in the emission or absorption of a discrete spectrum of light with specific frequencies or wavelengths.
Bohr's explanation of atomic spectra provided a breakthrough in understanding the quantized nature of energy levels in atoms and the discrete nature of emitted or absorbed radiation. It laid the foundation for quantum mechanics and contributed significantly to the understanding of atomic structure and the behavior of electrons within atoms.
Know more about Neli's Bohr Atomic Theory here:
https://brainly.com/question/28420370
#SPJ11
A sample containing 27. 0 moles of propane gas at a temperature of 25. 0 °C is stored in a 12. 5 liter cylinder. What is the pressure of the gas inside the cylinder?
Answers
The pressure of the gas inside the cylinder is 52.90 atm
Given is the number of moles of gas, the temperature and the volume of the gas and we need to find the pressure of the gas inside the cylinder, for this we can use the ideal gas law equation:
PV = nRT
Where:
P = Pressure of the gas (in units of pressure, such as atm)
V = Volume of the gas (in liters)
n = Number of moles of the gas
R = Ideal gas constant (0.0821 L·atm/(mol·K))
T = Temperature of the gas (in Kelvin)
First, let's convert the temperature from Celsius to Kelvin:
T = 25.0 °C + 273.15 = 298.15 K
Now we can substitute the values into the ideal gas law equation:
P × 12.5 L = 27.0 moles × 0.0821 L·atm/(mol·K) × 298.15 K
Simplifying the equation:
P × 12.5 L = 661.2587 L·atm
Dividing both sides by 12.5 L:
P = 661.2587 L·atm / 12.5 L
P ≈ 52.90 atm
Therefore, the pressure of the gas inside the cylinder is approximately 52.90 atm.
Learn more about ideal gas here:
https://brainly.com/question/15379358
#SPJ1
We can use the ideal gas law equation to determine the pressure of a gas within a cylinder:
PV = nRT
Where:
P is the pressure of the gas (in units of pressure, such as atm)
V is the volume of the gas (in units of volume, such as liters)
n is the number of moles of the gas
R is the ideal gas constant (0.0821 L·atm/(mol·K))
T is the temperature of the gas (in units of temperature, such as Kelvin)
we need to convert the temperature from Celsius to Kelvin:
T(K) = T(°C) + 273.15
T(K) = 25.0 °C + 273.15
T(K) = 298.15 K
Now we can plug the data into the ideal gas law equation as follows:
P * 12.5 L = 27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K
Simplifying the equation:
P = (27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K) / 12.5 L
Calculating the pressure:
P ≈ 5.046 atm
As a result, the gas inside the cylinder is under a pressure of about 5.046 atm.
Learn more about Ideal gas law equation, here:
https://brainly.com/question/3778152
#SPJ1
We are slowly learning that even if we react, it won't change anything, it won't make people suddenly love and respespect us, it won't magically change their minds. Sometimes it's better to just let things be, let people go, don't fight for closure, don't ask for explanations, don't expect people to understand where you're coming from. We are slowly learning that life is better lived when you don't center it on what's happening around you and center it on what's happening inside you instead.
Work on yourself and you inner peace.
Answers
Answer:
wow ok ill try to
Explanation:
this is the most beautiful thing ive seen all day
thank you
The unbalanced basic equation for the reaction in most airbags is NaN3 --> Na + N2.
A normal airbag needs about 67 liters of Nitrogen gas to fully inflate. (At STP: 1 mole of gas = 22.4 liters of that gas.) How many grams of reactant is needed to produce that amount of gas?
Answers
Answer:52!
Explanation:
Which of the following statements about vitamin K is false?O vitamin K1 oooo Vitamin K is covalently attached to proteins. O Vitamin K is a water-insoluble molecule. O Vitamin K is important for blood coagulation.O Vitamin K is structurally related to warfarin.
Answers
The false statement is: Vitamin K is covalently attached to proteins, but rather serves as a cofactor for the enzymes involved in blood coagulation.
1. Vitamin K1
2. Vitamin K is covalently attached to proteins.
3. Vitamin K is a water-insoluble molecule.
4. Vitamin K is important for blood coagulation.
5. Vitamin K is structurally related to warfarin.
Hence, The false statement is Vitamin K is covalently attached to proteins.
To know more about Vitamin K, visit:
https://brainly.com/question/12998225
#SPJ11
Nevada's annual precipitation averages between 21 and 24 cm. In comparison,Washington state averages between 96 and 97 cm of precipitation per year. Which of these factors has the greatest impact on the difference in precipitation between these two states?
Answers
Answer:
Mountain ranges and prevailing winds.
Explanation:
Mountain ranges and prevailing winds are the factors that is responsible for the difference in the precipitation between Nevada and Washington states. The Washington state is located along the coastal region of pacific ocean and having more mountain ranges which causes more rainfall in that region while on the other hand, Nevada state comprise of plateau, basins and far away from the ocean which is the main cause of lower rainfall as compared to Washington state.
why do acids react with carbonates?
Answers
Answer:
This is because the carbonate ion (CO32-) is a base, and when it reacts with an acid, it neutralizes the acid and forms a salt. The carbon dioxide that is produced is a byproduct of this reaction.
Explanation:
The reaction between an acid and a carbonate can be represented by the following general equation:
Acid + Carbonate --> Salt + Water + Carbon Dioxide
For example, the reaction between hydrochloric acid (HCl) and sodium carbonate (Na2CO3) can be written as:
HCl + Na2CO3 --> 2NaCl + H2O + CO2
In this equation, hydrochloric acid and sodium carbonate react to form sodium chloride (table salt), water, and carbon dioxide.
It's important to note that not all acids will react with carbonates. For example, sulfuric acid (H2SO4) is a strong acid, but it does not react with carbonates. This is because sulfuric acid is a strong dehydrating agent and will remove water from the reaction, preventing the formation of carbon dioxide.
what is the iupac name for the compound shown? a carbonyl is bonded to an alkyl group and an amine. the amine is bonded to c h 2 c h 3. the alkyl group is c h 2 c h 2 c h 3. the iupac name is:
Answers
Using IUPAC nomenclature rules, we can name this compound as follows: 2-oxobutane-1-ethyl-4-propylamine
The compound you have described has a carbonyl group bonded to an alkyl group and an amine group that is attached to a C H 2 C H 3 group. The alkyl group is C H 2 C H 2 C H 3 .
Using IUPAC nomenclature rules, we can name this compound as follows:
Identify the longest carbon chain containing the functional groups. In this case, the longest carbon chain is four carbons long, and contains the carbonyl group and the nitrogen atom.Number the carbon atoms in the main chain so that the carbonyl group and the amine group get the lowest possible numbers. In this case, the carbonyl group is on carbon 2 and the nitrogen atom is on carbon 3.Name the substituents attached to the main chain using alphabetical order. In this case, we have two substituents: an ethyl group attached to carbon 1 and a propyl group attached to carbon 4.Putting it all together, the IUPAC name of this compound is:
2-oxobutane-1-ethyl-4-propylamine
Note that the carbonyl group is indicated by the "-one" suffix and the amine group by the "-amine" suffix. The ethyl and propyl groups are indicated by their respective prefixes.
For more question on IUPAC click on
https://brainly.com/question/16631447
#SPJ11
On a phase change diagram, such as a heating or cooling curve, the horizontal line
indicates a time when the temperature of the substance is staying the same.
True or false
Answers
Which of the following is not related to metallic bond?
A. Alloy
B. Shared electrons
C. Transferred electrons
D. Sea of electrons
Answers
Answer: B. Shared electrons
Explanation: Electrons are shared in covalent bonds. The other options are all properties of metallic bonds.
How can you show using Pauli's exclusion principle that p sub shell can have only 6 electrons?
Answers
where l = subshell value.
"l"values of subshell are.
s = 0.
p = 1.
d = 2.
f = 3.
So in p orbital we have 6 electrons.
Calculate the mass of Aluminum Bromide that can be made with 5.6 moles of Aluminum
Answers
The mass of Aluminum tri bromide that can be made with 5.6 moles of Aluminum is 1,492.90 grams.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be calculated by using the below equation as:
n = W/M, where
W = given massM = molar massGiven chemical reaction is:
2Al + 3Br₂ → 2AlBr₃
From the stoichiometry of the reaction, it is clear that:
2 moles of Al = produces 2 moles of AlBr₃5.6 moles of Al = produces 2 moles of AlBr₃Now mass of AlBr₃ will be calculated by using the above equation as:
W = (5.6mol)(266.59g/mol) = 1,492.90g
Hence required mass of AlBr₃ is 1,492.90g.
To know more about mass & moles, visit the below link:
https://brainly.com/question/19784089
#SPJ2
The melting point of this substance is __________________.
Put a number in the answer.
Answers
The melting point of the substance is 12.5 degrees Celsius
What is melting pointMelting point is the temperature at which a solid substance changes state from solid to liquid at atmospheric pressure.
At the melting point, the solid and liquid phases of the substance exist in equilibrium, and any further increase in temperature will cause the substance to completely melt into a liquid.
The melting point is a characteristic physical property of a substance and can be used to identify and purify a substance. The melting point of a substance is usually reported in degrees Celsius (°C) or Kelvin (K).
Learn more about melting point at
https://brainly.com/question/40140
#SPJ1
Provide the structure of the major organic product which results when phco2ch2ch3 and ch3ch2co2ch2ch3 are heated in the presence of sodium ethoxide and the compound generated is subsequently treated with cold, dilute acid.
Answers
The major organic product is 2-ethylbutan-2-ol (C₅H₁₂O):
CH₃CH₂CO₂CH₂CH₃ + NaOEt --> CH₃CH₂CO₂CH(CH₃)CH₃
CH₃CH₂CO₂CH(CH₃)CH₃ + H₂O --> 2-Ethylbutan-2-ol + Na⁺ + OH⁻
What are organic products?With very few exceptions, chemicals, regardless of their source, are classified as organic if they contain at least one carbon atom. For this reason, organic chemistry is called "the chemistry of carbon". Generally, this carbon atom is bonded to at least one hydrogen atom.
The basic types of reactions in organic chemistry are addition reactions, elimination reactions, substitution reactions, pericyclic reactions, rearrangement reactions, photochemical reactions, and redox reactions. Organic synthesis uses organic reactions to build new organic molecules.
Examples of organic compounds are carbohydrates, fats (lipids), proteins and nucleic acids, which are the building blocks of the molecules of life.
To learn more about organic chemistry
https://brainly.com/question/26088065
#SPJ4
HELP ASAP DUE TODAY
Answers
Answer:
4. c) Lose only 3 electrons
5. d) Nitrogen.
Your answers are correct
Consider the following intermediate chemical equations.
2 equations: upper P subscript 4 (s) plus 3 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 6 (s). Delta H 1 equals negative 1, 640 kilojoules. 2: upper P subscript 4 upper O subscript 10 (s) right arrow upper P subscript 4 (s) plus 5 upper O subscript 2 (g). Delta H 2 equals 2, 940.1 kilojoules.
What is the enthalpy of the overall chemical reaction Upper P subscript 4 upper O subscript 6 (s) plus 2 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).?
-4,580 kJ
-1,300 kJ
1,300 kJ
4,580 kJ
Answers
Answer:
-1300
Explanation:
Answer:
-1300
Explanation:
trust
What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.
Answers
The changes occur in reaction are the bond in H₂ is broken, and new bonds are formed between hydrogen and oxygen atoms.
What is hydrogen bond?Hydrogen bond is a type of chemical bond which is formed between the hydrogen atom and more electronegative atom due to high dipole interaction.
Given chemical reaction is:
2H₂ + O₂ → 2H₂O
In the above reaction hydrogen nucleus not loses proton inspite of that it was broken and new bond formation takes place in water.
Despite the fact that oxygen atoms attract electrons from hydrogen atoms, oxygen atoms do not gain electrons.
In the water molecule each electron of both hydrogens is shared with an oxygen atom.
As a result, in the preceding equation, the hydrogen molecule's bond is broken, a new bond is formed, and each hydrogen atom's electron is shared with an oxygen atom.
To know more about hydrogen bonding, visit the below link:
https://brainly.com/question/12798212
Answer:
c and d on edge 2022
Explanation:
A substance decomposes with a rate constant of 9. 05 x 10-45-1. How
long does it take for 13. 0% of the substance to decompose?
Answers
The chemical must break down within 283 seconds.
The fact that the rate constant "k" is expressed in units of "s1" indicates that the reaction is a first-order one.
We also have the following for the first-order process from chemical kinetics:
equation is in attached image
Where,
K is the reaction's rate constant.
R0 = starting reactant concentration
R=remaining reactant concentration at time t.
t is the length of time needed for the change to take place.
Considering the query we have,
\(K=\frac{2.303}{t} log \frac{R_{0}}{R}\\K=9.05 {*} 10^{-4}S^{-1}\)
R₀=100g
R=100-13=87g
By changing the necessary variables in equation (1), we obtain;
\(t=\frac{2.303} k *log \frac{100}{87}\\\\\\t=\frac{2.303}{9.05*10^{-4}} (log100-log87)\\\\t=\frac{2.303} {9.05*10^{-4}} *1.113\\\\t=\frac{2.563}{9.05}*10^{4} sec\\\\t=0.283*10^{4} sec\\\\t=283sec\)
Therefore, 283 seconds are needed for the chemical to break down.
learn more about concentration Refer:brainly.com/question/10725862
#SPJ4
Which of the following is the correct sequence of events in cholesterol synthesis? (Note: not all events in the sequence are included)
HMG-CoA > isopentyl pyrophosphate > farnesyl pyrophosphate > geranyl pyrophosphate
isopentyl pyrophosphate > squalene > oxidosqualene > geranyl pyrophosphate
dimethylallyl pyrophosphate > geranyl pyrophosphate > farnesyl pyrophosphate > squalene
HMG –CoA > phosphomevalonate > squalene >farnesyl pyrophosphate
mevalonate > dimethylallyl
pyrophosphate > farnesyl pyrophosphate > gernayl pyrophosphate
Answers
The correct sequence of events in cholesterol synthesis is HMG –CoA > phosphomevalonate > isopentenyl pyrophosphate > dimethylallyl pyrophosphate > geranyl pyrophosphate > farnesyl pyrophosphate > squalene > lanosterol > cholesterol.
HMG-CoA: The precursor of cholesterol is HMG-CoA (3-hydroxy-3-methylglutaryl-coenzyme A). The synthesis of HMG-CoA occurs in the cytoplasm of cells.
Isopentenyl pyrophosphate: HMG-CoA undergoes a series of reactions to form mevalonate. Isopentenyl pyrophosphate is formed from mevalonate by the conversion of mevalonate to mevalonate-5-phosphate.
Dimethylallyl pyrophosphate: Isopentenyl pyrophosphate condenses with dimethylallyl pyrophosphate to produce geranyl pyrophosphate.
Geranyl pyrophosphate: Geranyl pyrophosphate is transformed into farnesyl pyrophosphate by the addition of another molecule of isopentenyl pyrophosphate.
Farnesyl pyrophosphate: Farnesyl pyrophosphate is transformed into squalene by the removal of two phosphate groups.
Squalene: Two squalene molecules join together to form the first cyclic intermediate, lanosterol.
Lanosterol: Lanosterol is then transformed into cholesterol through a series of reactions.
Therefore, the correct option among the given options in the question is HMG –CoA > phosphomevalonate > squalene >farnesyl pyrophosphate.
You can learn more about cholesterol at: brainly.com/question/29661052
#SPJ11
Which of the following best describes where cellular respiration occurs?
Answers
Answer:
In every body cell
Explanation:
Answer: in every body cell
Explanation:
The bonds of the product store 27 KJ more energy than the bonds of the reactants how is energy conserved during this reaction
A.The reaction creates 27 kj of energy when bonds form.
B.The reaction system absorbs 27 kj of energy from the surroundings.
C.The reaction uses up 27 kj of energy when bonds break.
D.The surroundings absorb 27 kj of energy from the reaction system.
ANSWER: the answer is b
Answers
If the bonds of the product store 27 KJ more energy than the bonds of the reactants, It means the surroundings absorb 27 kj of energy from the reaction system Hence, Option (D) is the correct answer
What is the Exothermic reaction ?An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.
The bonds of the product store 27 KJ more energy than the bonds of the reactants, It means that energy has been absorbed by the surrounding as the product formed is more stable due to more stronger bond
This can be inferred from more stored energy with in the bonds and Thus, It is a exothermic reaction.Hence, Option (D) is the correct answer
Learn more about exothermic reaction here ;
https://brainly.com/question/9799465
#SPJ1
What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4% (by mass) sulfur? What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4% (by mass) sulfur? Ca2S4 CaS Ca2S CaS4 CaS2 Request
Answers
Answer: The empirical formula is \(CaS\)
Explanation:
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of Ca= 55.6 g
Mass of S = 44.4 g
Step 1 : convert given masses into moles.
Moles of Ca =\(\frac{\text{ given mass of Ca}}{\text{ molar mass of Ca}}= \frac{55.6g}{40.08g/mole}=1.38moles\)
Moles of S =\(\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{44.4g}{32.06g/mole}=1.38moles\)
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Ca = \(\frac{1.38}{1.38}=1\)
For S = \(\frac{1.38}{1.38}=1\)
The ratio of Ca : S = 1:1
Hence the empirical formula is \(CaS\)
2. (01.06 LC)
Which of the following correctly describes a compound? (4 points)
The atoms are chemically bonded together, and they retain their individual physical and chemical properties.
O The atoms are not chemically bonded, and there is no set ratio for how the atoms can combine together.
The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.
O The atoms do not retain their individual chemical properties, and they can be separated by physical means.
3. (01.06 MC)
Sterling silver is an alloy of silver made up of around 93% silver and 7% other
Answers
Answer:
The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.
Explanation:
A compound is where two or more elements are chemically joined. This means that the atoms lose its individuals properties and have different properties from the elements it is combined with. Salt and sugar are simple examples of this.
Once chemically joined, a compound cannot be physically separated like picking off raisin off a raisin cookie. It must be separated through another chemical change.
There is also a fixed ratio that atoms combine due to the nature of electrons and individual elemental properties.