The correct time interval is (2,20) to (4,80).
What is the average velocity?The average velocity is defined as the velocity or speed of the body throughout the period of motion under consideration. This will always span the entire journey. Recall that velocity is the ratio of distance covered to time taken. The average velocity spans the entire journey and differs from the instantaneous velocity which occurs at a particular point along the journey.
Now we know that the average distance is obtained as the sum of the initial and final velocity multiplied by time and divided by two. Bear in mind that the question already contains the information that we have been told that the average velocity here is 40 km/hr. We can clearly see from the forgoing that the correct time interval is (2,20) to (4,80).
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Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in the last column of the table.
The possible options for the proposed multiplication or division of measurements are:
1. 9.0 km * 7.0 km = 63 km²; this is a correct option because km² is dimensionally correct.
3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.
What are the possible options among the proposed multiplication or division of measurements?The possible options among the proposed multiplication or division of measurements are those which are dimensionally correct.
Considering the given options:
1. 9.0 km * 7.0 km = 63 km²
This is a correct option because km² is dimensionally correct as it is a unit of area.
2. 2.0 g² * 0.043 kg is not correct since there is no unit of square mass.
3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.
In conclusion, the correct measurements options are those that are dimensionally correct.
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One d orbital can
hold ___ electrons.
A. 2
B. 6
C. 10
D. 14
[tex]{ \red{ \tt{option \: (c)}}}[/tex]
Explanation:
One d orbital can hold 10 electrons.
The maximum number of electrons which can be hold by one d orbital is 10 electrons. It can hold less than 10 electrons in it's orbit but not more than 10 electrons. It's impossible to hold and never possible to hold more than 10 electrons in d orbital.
The ionic compound iron(ii) sulfate is used in iron-containing supplements. What does the (ii) in the name of this compound specifically indicate?
The iron ion's charge is +2 in iron (II) sulfate, which is denoted by the symbol (II).
Information about iron (II) sulfate:
A group of salts having the formula FeSO4xH2O is referred to as iron(II) sulfate or ferrous sulfate. Although there are multiple known values for x, the heptahydrate form of these chemicals is the most frequent. The hydrated form has both commercial and medicinal uses, including the treatment of iron deficiency.The identical aqua combination [Fe(H2O)6]2+, which has octahedral molar mass and is paramagnetic, is produced when all iron(II) sulfates are dissolved in water. Historically, copper(II) sulfate was referred to as blues copperas, and iron(II) and zinc sulfate were referred to, correspondingly, as greenish and white copperas.Learn more about iron here:
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how small atom partical are?
Atoms of particles are so small that they cannot be divided further by any physical means.
What are atoms?According to John Dalton, atoms are the smallest, indivisible particles of elements.
However, it was later found out that chemically, atoms consist of protons, neutrons, and electrons.
Thus, the indivisibility of atoms that John Dalton was referring to must be that of physical division.
In other words, the particles of atoms are so small that dividing them further using physical means is absolutely impossible.
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25. 00 ml of a buffer solution contains 0. 500 m hclo and 0. 380 m naclo. if 50. 00 ml of water is added to the buffer, what are the new concentrations of hclo and naclo?
The new concentrations of [tex]HClO[/tex] and [tex]NaClO[/tex] are 0.25M and 19M
Calculation of number of moles of each component,
Molarity of [tex]HClO[/tex] = number of moles/volume in lit = 0. 500 M
Number of moles = molarity of [tex]HClO[/tex]× volume in lit = 0. 500 M× 0.025 L
Number of moles of [tex]HClO[/tex] = 0.0125 mole
Molarity of [tex]NaClO[/tex] = number of moles/volume in lit = 0. 38 M
Number of moles = molarity of [tex]NaClO[/tex] × volume in lit = 0. 38 M× 0.025 L
Number of moles of [tex]NaClO[/tex] = 0.95 mole
Calculation of new concentration at volume 50 ml ( 0.05L)
Molarity of [tex]HClO[/tex] = number of moles/volume in lit = 0.0125 mole/0.05L
Molarity of [tex]HClO[/tex] = 0.25M
Molarity of [tex]NaClO[/tex] = number of moles/volume in lit = 0.95mole/0.05L
Molarity of [tex]NaClO[/tex] = 19 M
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A sample of gas has an initial volume of 3.97 L at a pressure of 709 mmHg . If the volume of the gas is increased to 5.36 L , what is the pressure
Answer:
525 mmHg
Explanation:
If all other variables are held constant, you can find the pressure using Boyle's Law. The equation looks like this:
P₁V₁ = P₂V₂
In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can plug the given values into the equation and simplify to find "P₂".
P₁ = 709 mmHg P₂ = ? mmHg
V₁ = 3.97 L V₂ = 5.36 L
P₁V₁ = P₂V₂ <----- Boyle's Law
(709 mmHg)(3.97 L) = P₂(5.36 L) <----- Insert values
2814.73 = P₂(5.36 L) <----- Simplify left side
525 = P₂ <----- Divide both sides by 5.36
The addition of two-carbon units to a growing fatty acid chain is directly driven by?
The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.
Hence, Option C is correct answer.
What is Fatty Acid ?Fatty acids are carboxylic acid in which molecules are composed of a straight long chains of even number of carbon atom with hydrogen atoms. Fatty acid is an acid that is found in fats and oils.
What is Decarboxylation ?The chemical reaction which eliminates a carboxyl group and releases carbon dioxide is called decarboxylation.
Thus from the above conclusion we can say that The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.
Hence, Option C is correct answer.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: The addition of two-carbon units to a growing fatty acid chain is directly driven by
a) Hydrolysis of ATP
b) Oxidation of NADPH
c) Decarboxylation of malonyl-coA
d) Reduction of NADP+
Which reaction most accurately represents the dissociation of nitrous acid (hno2) in water?
When nitrous acid (HNO₂) dissociates in water (H₂O), the reaction that best captures this process is:
HNO₂ (aq.) + H₂O ↔ H₃O⁺ (aq.) + NO₂⁻ (aq.)
How does one know about HNO₂?
The chemical designation for nitrous acid is HNO₂, and it is a monoprotic acid. Three elements—hydrogen(H), oxygen(O), and nitrogen(N), all compose it. It is highly fragile in nature and only occurs in solutions. It is employed to convert amines into diazonium salts.Is HNO₂ a basic or an acid?
Acidity is assigned to nitrous acid (HNO₂). Once dissolved in water, it gives out H+ ions. Acid is a chemical that produces H+ ions in a water-based solution or gives the protons to other molecules.
Thus, HNO₂ is acid because it causes a mixture of water to contain H+ ions. In a 10 mM concentration, it possesses a pH of 2.67.
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What would happen if N₂ were added to N₂(g) + O₂(g) = 2NO(g) at
equilibrium?
O A. More O2 and NO would form.
OB. More NO would form.
C. More N₂ and O2 would form.
O D. Keq would decrease.
Answer:
B.) More NO would form.
Explanation:
If the amount of N₂ increases, the equilibrium will be out of balance. In order to restore the balance, the reaction will shift to the products side. As such, the amount of NO will increase.
According to Le-chatlier principle, if N₂ is added to the reaction system, then more NO will be produced so as to decrease the amount of N₂.
What is Le-Chatlier principle ?The Le Chatlier's Principle, also known as the Le Chatlier's Law, is a principle in chemistry that states that when a system at equilibrium is subjected to a change in conditions, such as temperature, pressure, or concentration, the system will adjust its equilibrium position to counteract the change and restore equilibrium.
In other words, if a system is disturbed from its equilibrium state, it will try to minimize the effect of the disturbance by shifting the equilibrium position in a direction that partially offsets the disturbance.
If any substance is added to the system, the equilibrium will shift to the direction in which the added substance is consumed. Hence, as N₂ is added to the system, it will consumed to give the product NO.
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When the ph of an aqueous solution is changed from 1 to 2, the concentration of hydronium ions in the solution is.
Answer:
decreased by a factor of 10
Explanation:
pH is defined in such a way that;
pH= −log10(H)
Where H represents the concentration of Hydronium or Hydrogen ions
Given that pH is changed from 1 to 2,
By rearranging the above formula , we get 10−pH = H
if pH=1,H=10−1=0.1Mif pH=2,H=10−2=0.01MTherefore, 0.1/0.01 = 10 and 0.1 > 0.01
Hence, the concentration of hydronium ions in the solution is decreased by a factor of 10.
How many electrons are present in the nonbonding π molecular orbital of the allyl anion?
The number of electrons present in the nonbonding π molecular orbital of the allyl anion is 4 electrons . 2 in the pi bond of the allyl ion and the other two will be present as a lone pair on the carbon atom.
What is a nonbonding π molecular orbital?It is a type of orbital that does not affect the bond order or bond length and the bond order of the molecule and does not affect its energy too.
In allyl anion allyl anion occupies 4 pi electrons and ψ2 is the Highest Occupied Molecular Orbital whereas ψ3* is the Lowest Unoccupied Molecular Orbital
Therefore, the number of electrons present in the nonbonding π molecular orbital of the allyl anion is 4 electrons . 2 in the pi bond of the allyl ion and the other two will be present as a lone pair in on the carbon atom.
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In a particular redox reaction, no−2no2− is oxidized to no−3no3− and fe3 fe3 is reduced to fe2 fe2. complete and balance the equation for this reaction in acidic solution. phases are optional
Balanced chemical equation is - 3Fe2+ + NO3- + 4H+ → 3Fe3+ + NO + 2H2O
Fe2+ + NO3- + H+ → Fe3+ + NO3- + NO + H2O
Fe+22+ + N+5O-23- + H+1+ → Fe+33+ + N+5O-23- + N+2O-2 + H+12O
3Fe2+ + NO3- + 4H+ → 3Fe3+ + NO + 2H2O
A balanced chemical equation specifies the quantities of reactants and products required to meet the Law of Conservation of Mass. This signifies that there is the same number of each sort of atom on the left side of the equation as there are on the right side. The rule of a balanced chemical equation is used to determine if two weights put on opposing sides of the fulcrum will balance each other.
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Identify the location of reduction in an electrochemical cell. group of answer choices the electrode the anode the socket the cathode the salt bridge
The location of reduction in an electrochemical cell is called the anode.
An electrochemical cell ( galvanic cell ) is generate electric energy from chemical reactions. In galvanic cell species ( for example zinc and zinc cations ) from one half-cell lose electrons ( oxidation ) and species from other half-cell ( for example copper and copper cations ) gain electrons ( reduction ). Electric current is generated due to the flow of electrons from the anode that undergoes an oxidation reaction to the cathode which has a reduction reaction in the circuit of an outer wire circuit.
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What is the molar concentration of potassium ions in a 0. 250 m k2so4(aq) solution?
The molar concentration of potassium ions in a 0. 250 m K₂SO₄(aq) solution is 2.
What is molar concentration?The molar concentration of a solution is the presence of solute in one unit of a solution.
Molar concentration = number of moles / volume
The volume is given 0.250 m
To calculate the number of moles:
There will be 2 moles of potassium and 1 mole of sulfate in one L of the solution.
So in 0.250 L
0.250 x 2 x 1 = 0.500
The total number of moles of potassium and sulfate ion are 0.500
Now, putting the value:
Molar concentration = number of moles / volume
0.500 / 0.250 = 2
Thus, the molar concentration is 2.
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Consider the following balanced equation: 4ZnS + 6O2 Image 4ZnO + 4SO2
Determine the number of moles of zinc oxide produced when 2.5 mol of zinc sulfide is combined with excess O2.
???
Answer:
2.5 moles ZnO
Explanation:
To find the amount of moles, you need to use a mole-to-mole ratio between ZnS and ZnO. The mole-to-mole is made up of the coefficients in the balanced equation.
4 ZnS + 6 O₂ -----> 4 ZnO + 4 SO₂
2.5 moles ZnS 4 moles ZnO
----------------------- x ----------------------- = 2.5 moles ZnO
4 moles ZnS
**While the chemical equation is technically balanced, it does not exist in the smallest mole ratio as possible. Each coefficient can be divided by 2.**
2 ZnS + 3 O₂ -----> 2 ZnO + 2 SO₂
Drag each relation to the correct location on the table. Classify the relations according to whether or not they are functions. 30 points I need answer quick. This is due right now.
Using the given relations we can deduce the fact that 3x-0.25y=3 is the only function and the other two -3x=15, 2y=10 are said to be not a functions.
What is known to be a function?A function is a term that is known to be the association that do exist between a group of inputs that are said to have only a single output each.
A function is also seen as the association between inputs where each input which is known to be linked to only one output.
To know the function, we have been given 3 relations that are:
-3x=15
2y=10
3x-0.25y=3
In -3x=15, one can calculate the value of x=-5 but cannot calculate for the value of y.
In 2y=10, we see that only one variable via which we can only get the value of y.
In 3x-0.25y=3 , when we put the value of x then we can be able to get the value of y and this means that each value of x is said to be a corresponding value of y. Therefore 3x-0.25y=3 is said to be the only function among the three.
Therefore, Using the given relations we can deduce the fact that 3x-0.25y=3 is the only function and the other two -3x=15, 2y=10 are said to be not a functions.
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See full question below
Drag each relation to the correct location on the table.
Classify the relations according to whether or not they are functions.
-3x = 15
2y = 10
3x − 0.25y = 3
{(2, 3), (1, 3), (5, 3), (2, 6)}
What does summarizing involve?
A. Detailing every aspect of what was just read
B. Creating mental images of each idea in the text
C. Inferring the relationship between two characters in the text D. Stating the point of the text in a few brief statements
Answer:
The correct answer is D. Stating the point of the text in a few brief statements.
Explanation:
The whole idea of a summary is to effectively restate the text by only focusing on the main points.
Hope this helps:) Good luck!
A label on an empty sample container reads 12. 00 g. you add in a sample of a compound and mass the sample container obtaining 15. 5465 g. what should the mass of the sample be reported as?
The mass of the substance is the quantitative measure of the physical object. The mass of the sample must be reported as 3.5465 g. Thus, option e is correct.
What is mass?The mass of the substance is the quantity of matter that the sample weighs and is reflected in grams or kilograms.
Given,
Mass of empty sample container = 12.00 g
Mass of sample + empty container = 15.5465 g
The mass of the sample will be given as,
mass of sample = (Mass of sample + empty container) - ( Mass of empty container)
= (15.5465 g - 12.00g)
=3.5465 g
Therefore, 3.5465 gm is the mass of the sample, and the correct option is e.
Your question is incomplete, but most probably your full question was, A label on an empty sample container reads 12.00 g. you add in a sample of a compound and the mass of the sample container obtaining 15.5465 g. what should the mass of the sample be reported as?
3.546 g3.54 g4 g4.0 g3.5465 gLearn more about mass here:
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1. Fill in the blanks.
a. Breathing is a combined form of______and_______.
b. Oxygen is absorbed by diffusion from______of the lungs.
c. Plants take______gas for respiration. d. Plants have______and______for respiration.
e. Plants have_______and_______for transportation.
Respiration deals with the gaseous exchange that occur between the individuals and the environment.
What is respiration?The term respiration deals with the gaseous exchange that occur between the individuals and the environment. The individuals take in a gas from the environment and pass out a gas to the environment. This is the way in which the balance of the universe is maintained.
Now, plants take in carbon dioxide and give out oxygen whereas animals take in oxygen and give out carbon dioxide. By so doing, the delicate carbon - oxygen balance in nature is maintained unless it is upturned by anthropogenic activities.
The following fill in the blanks as requested in the question;
a) Inhalation and exhalation'
b) trachea
c) carbon dioxide
d) leaves and stomata
e) xylem and phloem
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Answer:
a) inhalation and exhalation
b) trachea
c) carbon dioxide
d) leaves and stomata
e) xylem and phloem
A gas effuses 4.0 times faster than oxygen (o2). what is the molecular mass of the gas? 1.0 g/mol 1.0 g/mol 2.0 g/mol 2.0 g/mol 4.0 g/mol 4.0 g/mol 7.67 g/mol
Answer:
32(molecular mass has no unit )
Explanation:
(16)(o2)
16×2
=32
Draw the most stable form of the major product of each of the molecules with excess naoch2ch3 in ch3ch2oh , followed by aqueous acidic workup.
The stable form of the major product of naoch2ch3 in ch3ch2oh reaction is given below.
What is aqueous acidic?The pH of an aqueous solution is the measurement of how acidic or basic it is. The pH of an aqueous solution can be defined and calculated by using the attention of the hydronium ion attention in the solution.When disbanded in an aqueous resolution, certain ions were removed from the explanation. An Arrhenius acid is a combination that increases the attention of H+ ions that are present when counted to water. These H+ ions include the hydronium ion (H3O+) when they incorporate with water molecules.To learn more about aqueous acidic, refer to:
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Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g) → 2NH3 (g) A 9.3-g sample of hydrogen requires ________ g of N2 for a complete reaction.
Answer:
43 g N₂
Explanation:
To find the mass of N₂ required, you need to (1) convert grams H₂ to moles H₂ (via molar mass), then (2) convert moles H₂ to moles N₂ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles N₂ to grams N₂ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the amount of sig figs of the given value.
Molar Mass (H₂): 2(1.008 g/mol)
Molar Mass (H₂): 2.016 g/mol
Molar Mass (N₂): 2(14.009 g/mol)
Molar Mass (N₂): 28.018 g/mol
1 N₂(g) + 3 H₂(g) -----> 2 NH₃(g)
9.3 g H₂ 1 mole 1 mole N₂ 28.018 g
-------------- x ---------------- x -------------------- x ------------------ = 43 g N₂
2.016 g 3 moles H₂ 1 mole
Why is an aqueous solution of potassium hydroxide an unsuitable medium for effecting the base promoted elimination of the E2 reaction procedure
The potassium hydroxide is an unsuitable medium because an aqueous solution medium is highly polar in nature, so there will be a high tendency for carbonation to be formed and prefer substitution reaction rather than an elimination reaction.
The potassium hydroxide is an unsuitable medium for effecting the base-promoted elimination due to the fact that alkoxide anions aren't only more basic than the pure hydroxyl group, but they may be also bulkier. The higher bulkiness makes it a worse nucleophile than hydroxyl and the higher basicity makes it better at E2 eliminations.
A substitution reaction is a form of Chemical reaction in which the functional group of 1 chemical compound is substituted by means of any other group or it's miles a reaction that involves the substitute of one atom or a molecule of a compound with another atom or molecule.
Carbonation is the chemical reaction of carbon dioxide to provide carbonates, bicarbonates, and carbonic acid. In chemistry, the term is sometimes used in place of carboxylation, which refers to the formation of carboxylic acids.
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What will happen when a base reacts with an acid?
A salt and water will form.
There will be no reaction.
The base will increase in concentration.
The acid will increase in concentration.
Answer:
When acid reacts with base it will form salt and water
When a base reacts with an acid, a salt and water will form. Therefore, the correct option is option A.
What is acid base reaction?The exchange of one or perhaps more hydronium ions, H+, amongst species that can be either neutral (molecules like water, H2O, or acetic acid, CH3CO2H), or electrostatic attraction (ions like ammonium, NH4+, hydroxide, OH, or carbonate, CO32), is what is known as an acid-base reaction.
It also includes equivalent behavior of acidic ions and molecules (aluminum chloride, AlCl3, as well as the silver ion AG+) that do not give hydrogen ions. When a base reacts with an acid, a salt and water will form.
Therefore, the correct option is option A.
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Emphysema can lead to which acid/base disturbance? What would be the compensation?
Emphysema can lead to respiratory acidosis acid/base disturbance.The compensated respiratory acidosis is typically the result of the chronic condition , the slow nature of onset giving the kidney time to compensate.
If the primary acid-base disorder is from respiratory , then the kidneys will compensate. If the primary acid-base disorder is from metabolic cause, then the lungs will compensate.The respiratory compensation can be begin within minutes and becomes maximal in 12-24 hours
The respiratory acidosis occurs when breathing out does not get of enough [tex]CO_{2}[/tex] . The increased [tex]CO_{2}[/tex] that remains results in overly acidic blood. This can results from respiratory problems.
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another student collected boiling point data of 10 different substances. Should he display his results in a line graph or a bar chart.
Answer:
Bar chartExplanation:
Because if he displays his or her result in a line graph the Boling data of 10 different substances will be incorrect.Hope it helps you
Which valid empercal formula below would have one. Five times as much oxygen as there is gold in the substance
Answer:
Au2O3
Explanation:
See attachment.
The chemical process of food breakdown is called ________.
a) absorption
b) ingestion
c) digestion
d) secretion
The chemical process of food breakdown is called digestion.
Based about how food is digested, mechanical digestion versus chemical digestion is the two main types of catabolism. The digestive system's four important processes are motility, digesting, absorption, as well as secretion.
Digestion enzymes break down food as it moves from the mouth through our digestive system, transforming it into more easily absorbed nutrients. Chemical digestion would be the term for this disintegration. Amino acids as well as reducing sugars undergo a chemical reaction when food is processed and cooked at a high temperature, creating various flavors and brown colors.
Therefore, the chemical process of food breakdown is called digestion.
Hence, the correct answer will be option (c).
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4fe 3o2 xh2o → 2fe2o3 • xh2o the formation of rust (equation above) is an example of both combustion and
The formation of rust (equation above) is an example of both combustion and Synthesis
What is a synthesis reaction?A synthesis reaction is a classification of responses in which multiple reactants connect to form a single product. If we observe the equation, no replacement is accepted place hence, single and double replacements are wrong choices.In decomposition reaction there is only one reactance which gets disintegrate and form multiple product.Synthesis reactions are reactions that occur when two additional atoms or molecules interact to form a separate molecule or compound. Most of the time, when a synthesis reaction occurs, energy is discharged and the reaction is exothermic. However, an endothermic consequence is also feasible.learn more about synthesis reaction, refert o:
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Answer:
synthesis
Explanation:
What is the ph of a solution which is 0. 025 m in weak base and 0. 039 m in the conjugate weak acid ( a = 7. 1 × 10−6)?
The pH of the solution is 4.96.
pH measures the amount of hydrogen and hydroxide ions in a solution and shows how acidic or alkaline it is.
Weak bases are the solutions to substances that do not dissociate completely in water. Conjugate acids are the product formed by the base and have a difference of one proton.
Using the base dissociation constant, Ka
pKa can be calculated as,
[tex]pKa = - log (Ka)[/tex]
[tex]= - log (7.1 * 10^-6)[/tex]
[tex]= 5.15[/tex]
0. 025 M in the weak base and 0. 039 M in the conjugate weak acid.
Therefore, a weak base and its conjugate acid are present in equal proportions in buffer solution. As we are aware, the Henderson-Hasselbalch equation can be used to determine the pH of a buffer solution that comprises a weak base and its conjugate acid.
[tex]pH = pK + log [\frac{A^-}{HA} ]\\[/tex]
[tex]= 5.15 + log( \frac{0.025}{0.037})[/tex]
[tex]=5.15 + log 0.64[/tex]
[tex]=5.15-0.19[/tex]
[tex]=4.96[/tex]
Therefore, the pH of the solution is 4.96.
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