How would you calculate the reaction rate of a chemical reaction?
Multiply the change in concentration of the reactant by the change in time.
Divide the change in concentration of the reactant by the change in time.
Subtract the change in concentration of the reactant from the change in time.
Add the change in concentration of the reactant to the change in time.
Answers
To calculate the rate of a chemical reaction, we will divide the change in concentration of the reactant by the change in time.
option A.
What is rate of chemical reaction?The rate of reaction refers to the speed at which the products are formed from the reactants in a chemical reaction.
Also, the average rate of a chemical reaction is the change in the concentration of the reactant or product divided by the time taken for that reaction to complete or stop.
Average rate of reaction = change in concentration / change in time
To calculate the rate of a chemical reaction, we will use the following method as shown below;
Divide the change in concentration of the reactant by the change in time.
Thus, option A is the correct answer, and it explains the method of calculating the average rate of a chemical reaction.
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Related Questions
nonmetallic elements form ions by ____________
valence electrons to complete their outer shell.
gaining or losing?
Answers
Answer:
you know it is what it is☠
Explanation:
Nonmetallic elements form ions by valence electrons to complete their outer shell. The valence electrons an element has in its outer shell, the easier it is to complete. The electron shells an element has, the easier it is to fill its outermost shell.
At a certain point during a titration, 45. 0 ml of 0. 300 m nh3 solution has been added to 30. 0 ml of 0. 150 m hcl solution. At this point, the solution is.
Answers
Answer:
basic
Explanation:
The solution is basic because there are more OH- ions than H+ ions.
The work-energy theorem states that the work done on an object is equal to a change in which quantity?
O kinetic energy
O displacement
O potential energy
Omass
Answers
Answer :
A.) Kinetic energy
Explanation:
When work is either added to or taken away from a system, it forces the kinetic energy to change.
The work-energy theorem states : change in kinetic energy of an object is equal to the work done on the object
[ I took the quiz already on Edgenuity and received 100% ]
Hope this helped ! :)
Answer:
Kinetic energy
Explanation:
Edge 2020
In triangle MNO, MN = 20 units, NO = 15 units, and MO = 18 units. What is the approximate difference between the largest and smallest angle measures? 2° 5° 14° 28°.
Answers
The approximate difference between the largest and smallest angle measures is:∠M - ∠N ≈ 34.05° - 10.83° ≈ 23.22° Rounded to the nearest degree, the answer is 23°. Therefore, the correct option is 28°.
The largest and smallest angle measures in a triangle are always the angle opposite the longest side and the angle opposite the shortest side, respectively. Thus, in triangle MNO, the longest side is NO (15 units) and the shortest side is MO (18 units).
Therefore, the largest angle is ∠M, and the smallest angle is ∠N.
Using the law of cosines, we can find the measure of angle ∠M as follows:
cos ∠M = (NO² + MO² - MN²) / (2 × NO × MO)
cos ∠M = (15² + 18² - 20²) / (2 × 15 × 18)
cos ∠M = 0.80556
∠M = cos⁻¹(0.80556)
∠M ≈ 34.05°
Using the law of sines, we can find the measure of angle ∠N as follows:sin ∠N / NO = sin ∠M / MOsin ∠N / 15 = sin 34.05° / 18sin ∠N ≈ 0.18881∠N ≈ sin⁻¹(0.18881)∠N ≈ 10.83°
Therefore, the approximate difference between the largest and smallest angle measures is:∠M - ∠N ≈ 34.05° - 10.83° ≈ 23.22°Rounded to the nearest degree, the answer is 23°.Therefore, the correct option is 28°.
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I'd like some help with this.
Answers
Hard water is not typically caused by the concentration of dissolved oslolum (assuming you meant "solutes") but rather by the presence of high concentrations of dissolved minerals, such as calcium and magnesium ions
The net ionic equation for the formation of calcium carbonate (CaCO3) is as follows:
Ca2+ (aq) + CO32- (aq) → CaCO3 (s)
In this equation, the calcium ions (Ca2+) from the dissolved calcium compounds in hard water react with carbonate ions (CO32-) to form insoluble calcium carbonate precipitate (CaCO3), which appears as a white solid. The precipitation occurs because the solubility product of calcium carbonate is exceeded, resulting in the formation of a solid.
The formation of a precipitate is driven by the principle of solubility. When the concentration of a dissolved compound exceeds its solubility limit, the excess ions come together and form a solid. In the case of hard water, when the concentration of calcium ions and carbonate ions surpasses their respective solubility limits, calcium carbonate precipitate forms.
Regarding the replacement of calcium ions with sodium ions, if calcium ions were replaced with sodium ions in the net ionic equation, the reaction would be different. Sodium ions (Na+) do not form insoluble compounds with carbonate ions, and sodium carbonate (Na2CO3) is soluble in water.
In summary, the formation of calcium carbonate precipitate in hard water is driven by the reaction between calcium ions and carbonate ions, leading to the exceeding of the solubility product and subsequent precipitation. If calcium ions are replaced with sodium ions, no precipitate would form as sodium carbonate remains soluble in water.
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Hey can anyone pls answer dis in ur own wordssss
Answers
Answer: sorry
Explanation:
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if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), what is the wavelength?
Answers
If a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.
What do you mean by wavelength ?The term wavelength of light is defined as the distance between the two successive crests or troughs of the light wave. Wavelength is denoted by the Greek letter lambda (λ).
Given:
frequency = 7.20 x 10^14 Hz
speed of light = 3.0 x 10^8 m/s
Wavelength = ?
Wavelength = speed of light/ frequency
λ = ν / f
= 3.0 x 10^8 / 7.20 x 10^14
= 0.42 × 10⁻⁶ m
Thus, if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.
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How do you prepare 300 ml buffer of 100 mm tris ph 7. 8 and 250 mm nacl?
Answers
A buffer of 300 ml of 100 mM Tris pH 7.8 and 250 mM NaCl can be prepared by dissolving 3.64 g of Tris and 4.27 g of NaCl in 300 ml of water, and adjusting the pH to 7.8 using 10 ml of 1 M HCl. The % v/v refers to the volume of the solute while % w/v refers to the weight of the solute.
To prepare a 300 ml buffer of 100 mM Tris pH 7.8 and 250 mM NaCl, you need to follow the following steps:1. Calculate the amount of Tris required to prepare 100 mM solution of Tris, which is equal to 100 mM x 0.3 L = 0.03 moles. The molecular weight of Tris is 121.14 g/mol. Thus, the amount of Tris required is 3.64 g.2. To make the buffer of pH 7.8, use HCl or NaOH to adjust the pH. For this, use 1 M HCl or 1 M NaOH to avoid diluting the buffer. Add 10 ml of 1 M HCl to the solution.3. Measure 4.27 g of NaCl and add it to the solution. 4. Add water to the solution to make up the final volume of 300 ml. 5. Mix the solution thoroughly until everything is dissolved. Your buffer of 100 mM Tris pH 7.8 and 250 mM NaCl is now ready. % v/v refers to the percentage volume of a solute in a solvent while % w/v refers to the percentage weight of a solute in a solvent. The percent v/v is calculated by the volume of the solute divided by the volume of the solution while the percent w/v is calculated by the mass of the solute divided by the volume of the solution in which it is dissolved.For more questions on buffer
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The correct question would be as
How do you prepare 300 ml buffer of 100 mM Tris pH 7.8 and 250 mM NaCl? % v/v,% w/v Questions.
0.070g of caffeine is dissolved in 4.0 ml of water. the caffeine is extracted from the aqueous solution three times with 2.o ml portions of methylene chloride. calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride
Answers
The amount of caffeine that can be extracted from the aqueous solution into the three portions of methylene chloride is \(0.070g.\).
Caffeine is a stimulant drug that is found naturally in tea, coffee, chocolate, and some other plants. It is a molecular compound composed of 8 carbon atoms (C8), 10 hydrogen atoms (H10), 4 nitrogen atoms (N4), and 2 oxygen atoms (O2).
This can be calculated using the following equation:
Caffeine Extracted = (Amount of caffeine dissolved in water) / (Volume of water) x (Volume of methylene chloride)
\(Caffeine Extracted =\frac{ (Amount of caffeine dissolved in water) }{ (Volume of water) * (Volume of methylene chloride)}\\\\\\Caffeine Extracted = \frac{(0.070 g) }{(4.0 mL) * (2.0mL)}\\ \\ = 0.035 g\)
Therefore, the total amount of caffeine that can be extracted into the three portions of methylene chloride is \(0.070g\)
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Question 8 of 35
Which item rotates in a magnetic field as an electric motor produces kinetic
energy?
A. Permanent magnet
B. Loop of wire
C. Lightbulb
D. Battery
SUBMIT
Answers
You can download answer here
tinyurl.com/wpazsebu
In which region is the substance in both the solid phase and the liquid phase?
1 2 3 4
Answers
Answer:
its 2 on ed I promise do not listen to the brainiest
Explanation:
Answer:
B)2
Explanation:
Which part of this system is most greatly impacted when human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere?
Answers
When human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere, then atmosphere is most greatly impacted.
What are greenhouse gases?Greenhouse gases are gases the in the atmosphere of Earth that trap heat.
The greenhouse gases trap heat in the atmosphere and contribute to the phenomenon of global warming, which has numerous negative effects on the climate and environment.
Excessive greenhouse gas emissions can cause rising global temperatures, more frequent and severe weather events, sea level rise, ocean acidification, and other environmental changes that have significant impacts on ecosystems, agriculture and human societies. Therefore, it is important to reduce greenhouse gas emissions to mitigate the impacts of the climate change.
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Is there massless ness in space?Why?
Answers
Classify each of the following substances and descriptions as an electrolyte or a nonelectrolyte.
Answers
When dissolved in a solvent, an electrolyte separates into ions and has the ability to conduct electricity, whereas a nonelectrolyte does not separate into ions and has neither of these properties.
The descriptions and classifications for the substances are as follows NaOH(s) - Nonelectrolyte HCl(aq) - Electrolyte C6H12O6(aq) - Nonelectrolyte (since it is not dissolved in a solvent) Electrolyte KNO3(aq), nonelectrolyte CH3OH(aq), and electrolyte NH3(aq) (to a limited extent due to its weak base nature) Water is an electrolyte and MgCl2(aq) is an electrolyte. It should be noted that a material's behavior in a solution determines whether it is an electrolyte or a nonelectrolyte, and the same chemical can act in a variety of ways depending on the solvent employed.
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Why is fuel-cell technology, in its present state, not a pollution-free
alternative to the internal combustion gasoline engine?
Answers
Answer:
lol don't know please don't report me
Which of the graphs below shows a person walking at a constant rate with no change in speed or velocity?
All of these
Person b and person c
Person b only
Person b, c and d
Answers
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The graph showing a person who is walking at the same rate with no change in speed or velocity is :
Person B
Which of the following is the most accurate description of chemical energy? A. The energy released by heat in a chemical reaction B. The energy in the motion of the substance C. The energy stored in the chemical bonds of a substance D. The energy that is absorbed in a chemical reaction
Answers
Answer:
The answer is A The energy released by heat in a chemical reaction
Explanation:
im hella confused and need some help
Answers
(IMAGE ATTACHED)
I dont know what this is asking me, anyone know how to do this?
Answers
Answer:
Oh, you need to get the blue dots, and move them to the table or graph to plot them!
Hope that makes sense!
14. A force acts for 0.2 second on a body of mass 80 kg at rest and produces a velocity of 10 ms¹.Find the magnitude of the force.
Answers
The magnitude of the force acting on the body is 4000 Newtons.
To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.
The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.
The formula to calculate acceleration is:
Acceleration = Change in Velocity / Time
The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:
Change in Velocity = Final Velocity - Initial Velocity
Change in Velocity = 10 m/s - 0 m/s
Change in Velocity = 10 m/s
Now, we can calculate the acceleration:
Acceleration = Change in Velocity / Time
Acceleration = 10 m/s / 0.2 s
Acceleration = 50 m/s²
Finally, we can calculate the magnitude of the force using Newton's second law:
Force = Mass x Acceleration
Force = 80 kg x 50 m/s²
Force = 4000 N
Therefore, the magnitude of the force acting on the body is 4000 Newtons.
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What is the maximum number of electrons in an atom that can have the following quantum numbers? Specify the orbitals in which the electrons would be found. (a) n = 2, ms = +1 2; (b) n = 4, mℓ = +1; (c) n = 3, ℓ = 2; (d) n = 2, ℓ = 0, ms = −1 2; (e) n = 4, ℓ = 3, mℓ = −2.
Answers
Answer:
1.04
Explanation:
Why did Giovanni Battista Piranesi depict the Tomb of Metalli (c. 1756, etching) as larger than life?
A: to promote Roman engineering and history
B:to generate funds to repair monuments
C:he was unaware of its size
D: to promote tourism to Greece
Answers
Giovanni Battista Piranesi depict the Tomb of Metalli (c. 1756, etching) as larger than life (A) to promote Roman engineering and history.
Giovanni Battista Piranesi was a famous Italian artist and printmaker who was known for his depictions of ancient Roman architecture and engineering. He often depicted these structures as larger than life to emphasize their grandeur and importance.
In the case of the Tomb of Metalli, Piranesi may have depicted it as larger than life to showcase the impressive engineering skills of ancient Rome and to highlight the significance of this historical monument.
Giovanni Battista Piranesi depicted the Tomb of Metalli as larger than life in order to promote Roman engineering and history. By doing so, he aimed to emphasize the grandeur and architectural achievements of the ancient Romans, inspiring admiration and interest in their culture and history.
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How killers cover up their crimes
Answers
Answer:
They hide their evidence and destroy any if absolutely necessary. You also would need to wear gloves, so you dont put your identity everywhere. Also, you need to flee and just forget that what you did, did not happen. And hope you dont get arrested xD
Explanation:
Give an example of water in each state of matter.
Answers
Answer:
For example, water in a state of solid is ice where water is frozen under cold temperatures (i.e. below room temperature of a liquid). Water in a state of liquid is just water (in this state at room temperature, for example). Water in a state of gas can be water vapour as it's the gaseous phase of the water
Can i get a brainilest point pls...
Answer:
Solid, Liquid, and Gas
Explanation:
The three forms of water is a solid, like ice. Liquid like water and water vapor which is a gas.
4. How is water drained from homes, offices and commercial buildings? Describe the various paths of both grey water and black water.
Answers
The answers include the following:
Water is drained from homes, offices and commercial buildings through pipes that carry wastewater into underground collection systems.The various paths of both grey water and black water is almost the same but the major difference is that the former comes from all other parts of the building except toilet while the latter comes from only toilet.What is Drainage?This is referred to as the different types of methods which could be natural or artificial and employs the removal of excess water from a certain area or place.
Water in homes is drained through larger pipes which carry it into collection systems so as to prevent the risk of pollution and contamination of other areas.
Grey water path doesn't involve wastewater from the toilet while the black water comes from only the toilet which is why they were chosen as the correct choice.
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in one or two sentences, describe the reaction of the residents of kansas to the lecompton constitution.
Answers
The residents of Kansas were overwhelmingly opposed to the Lecompton Constitution. This was large because the document protected slavery and allowed the state government to decide whether slavery should be allowed in the new state.
The people of the state saw this as an affront to their values and democratic rights and worked to defeat the constitution in a state referendum.
After much debate and campaigning, the Lecompton Constitution was defeated by over 10,000 votes. This was a major victory for antislavery advocates, who had worked hard to make sure the constitution was rejected in Kansas.
The residents of Kansas were overwhelmingly opposed to the Lecompton Constitution. This document was drafted by pro-slavery advocates and would have made slavery a permanent institution in the state.
The citizens of Kansas were furious, and it sparked a great deal of debate and conflict. Many residents were so opposed to the document that they decided to form an independent government and reject the Lecompton Constitution in a referendum.
The referendum passed in an overwhelming majority, and the Lecompton Constitution was rejected. This event was a major milestone in the struggle for free-state rights in the Midwest and demonstrated the power of the people to resist oppressive legislation.
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Which equation is a decomposition reaction? Li2CO3 Right arrow. Li2O + CO2 Zn + HCl Right arrow. ZnCl2 + H2 Na2O + CO2 Right arrow. Na2CO3 C6H12O6 + O2 Right arrow. CO2 + H2O
Answers
Answer:
Li₂CO₃ ⇒ Li₂O + CO₂ is a decomposition reaction.
Explanation:
In a decomposition reaction, a single substance decomposes, producing two or more different substances. In other words, in this type of reaction two or more substances are formed from a compound. The atoms that form a compound separate to give the products according to the formula:
AB → A + B
It can occur spontaneously, or be aided by a catalyst, heat, or electrolysis.
In this case:
Li₂CO₃ ⇒ Li₂O + CO₂ It is a type of chemical reaction in which a single compound decomposes into two or more compounds. So it is a decomposition reaction.
Answer:
A. Li2CO3 Right arrow. Li2O + CO2
Explanation:
Correct answer on edge 2022.
relate the concepts of isotope and mass number
Answers
Answer:
Explanation:
Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. ... A property closely related to an atom's mass number is its atomic mass.
if you start with 0.373 m a(g), 0.396 m b(g), 0.552 m c(g), and 3.95 m d(g), what is the equilibrium concentration of c(g) and d(g)?
Answers
The equilibrium concentrations of reactant and products when 0.388 moles of PCl5(g) are introduced into a 1.00 L vessel at 500 K is 0.063 M.
Equilibrium concentration can be defined as when the both the reactants and the products of the reaction are in a concentration that is not in change with time. This is called as the state of chemical equilibrium. In the equilibrium state, the rate of forward reaction is same as the rate of backward reaction when the reaction is at equilibrium. Equilibrium concentration being the ratio of the concentrations raise to the stoichiometric coefficients.
Kc = [PCl3][Cl2]/[PCl5] = 1.2x10-2
Kc = [PCl3][Cl2]/[PCl5] = (x)(x)/(0.388-x) = 1.20x10-2 =
x2 + 1.2x10-2x - 4.66x10-3 = 0
x = -b ± √b2 - 4ac2a
x = 0.0626
[PCl5] = 0.388 - x = 0.388 - 0.0626 = 0.325 M
[PCl3] = [Cl2] = x = 0.063 M
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The complete question is,
Calculate the equilibrium concentrations of reactant and products when 0.388 moles of PCl5(g) are introduced into a 1.00 L vessel at 500 K.
why are the metals like gold and silver prefferred for making jwellery?
Answers
Answer:
Such metals like gold and silver are preferred for making jewelry because they are highly malleable, meaning they can be made into any shape or design without breaking. Also, gold and silver do not leave marks on skin, and silver tends to tarnish (lose its color), but very slowly.
Answer:
Explanation:Pleased to help u....
