A person inhales air richer in O₂ and exhales air richer in CO₂ and water vapor. During each hour of sleep, a person exhales a total of about 300 L of this CO₂-enriched and H₂O-enriched air.
(a) If the partial pressures of CO₂ and H₂O in exhaled air are each 30.0 torr at 37.0°C, calculate the mass (g) of CO₂ and of H₂O exhaled in 1 h of sleep.
Answers
If the partial pressures of CO₂ and H₂O in exhaled air are each 30.0 torrs at 37.0°C, the mass (g) of CO₂ is 16 grams and of H₂O is 6.7 grams exhaled in 1 h of sleep.
In a mixture of gases, every constituent gasoline has a partial pressure which is the notional stress of that constituent fuel as if it on its own occupied the whole volume of the authentic aggregate at the same temperature.
Partial pressure is the force exerted by using gas. The sum of the partial pressures of all of the gases in an aggregate equals the total pressure. Partial stress is extremely crucial in predicting the movement of gases. don't forget that gases generally tend to equalize their stress in areas that are connected.
in keeping with Dalton's law of partial pressures, the whole pressure through a combination of gases is the same as the sum of the partial pressures of every of the constituent gases. The partial strain is defined as the pressure each gasoline might exert if it on its own occupied the quantity of the combination at an equal temperature.
Using PV=nRT
n=(PV)/(RT)
= ((23/760) x 300L)/(0.0821x (273+26))
= 0.369846
Mass of CO2 = 0.369846 x molar mass of CO2= 16 grams
Mass of H2O = 0.369846 x molar mass of H2O= 6.7 grams
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Related Questions
The Na+/K+ pump helps a muscle cell maintain a state of ______.
Answers
The Na+/K+ pump helps a muscle cell maintain a state of "resting membrane potential." The resting membrane potential is the difference in voltage across the cell membrane when the muscle cell is not actively contracting.
The Na+/K+ pump plays a crucial role in this process by actively transporting three sodium ions (Na+) out of the cell and two potassium ions (K+) into the cell.
This exchange creates an electrochemical gradient, resulting in a net negative charge inside the cell and a net positive charge outside the cell.
This gradient is essential for the proper functioning of muscle cells, as it allows them to respond to stimuli and initiate muscle contractions.
In summary, the Na+/K+ pump is essential for maintaining the resting membrane potential in muscle cells, ensuring their proper function and responsiveness.
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in calorimetry, energy is measured through heat transfer from one substance to another. Which of the following is NOT a method of heat transfer?
Answers
Answer:
Explanationconvection
:
In calorimetry, energy is measured through heat transfer from one substance to another. Convection is not the method of heat transfer.
What is a calorimeter?A calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
For example, when an exothermic reaction occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution, which increases its temperature.
One technique we can use to measure the amount of heat involved in a chemical or physical process is known as calorimetry.
Calorimetry is used to measure amounts of heat transferred to or from a substance.
To do so, the heat is exchanged with a calibrated object (calorimeter).
Heat loss due to conduction is prevented by placing the calorimeter box in a well-lagged vessel using wool or cork material.
Heat loss due to convection is prevented by placing a lid on the box.
Heat loss due to radiation is minimized by polishing the box in order to smoothen it.
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Which best describes the motion of the object between 1 and 4 seconds? The object has decreasing acceleration and increasing velocity. The object has positive acceleration and eventually stops. The object has decreasing acceleration and decreasing velocity. The object has negative acceleration and eventually stops.
Answers
Answer:
D or 4
Explanation:
right on edge 2021
Answer:
d
Explanation:
Is it Ca₂C or CaC₂ which is calcium carbide?
Answers
The correct chemical formula for calcium carbide is CaC₂, not Ca₂C. It is a compound that is formed by the combination of calcium and carbon.
What is Calcium?
Calcium is a chemical element with the symbol Ca and atomic number 20. It is a soft, silvery-white metal that belongs to the alkaline earth metals group.
Calcium carbide is an important industrial chemical that is used in a variety of applications, including the production of acetylene gas, which is used as a fuel and in welding and cutting applications. It is also used in the production of calcium cyanamide, which is used as a fertilizer, and in the production of various organic chemicals. The difference between CaC₂ and Ca₂C is significant, as the latter compound does not exist. It is important to use the correct chemical formula when referring to a particular compound, as using an incorrect formula can lead to confusion and potentially dangerous situations in industrial settings.
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When a mixture of carbon and water is filtered what is the residue
Answers
When this new mixture is then filtered, the salt in the salty water solution passes through the filter paper to form the filtrate and the sand remains as the residue.
The process of mixtures
A mixture is composed of two or more types of matter that can be present in varying amounts and can be physically separated by using methods that use physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.
When water mixes with carbon dioxide, a substance called carbonic acid is formed. Carbonic acid is a weak acid that plays an important role in the carbon cycle. The carbon cycle is the process through which carbon moves from the atmosphere, to plants, then to animals, to the soil, and and back into the atmosphere.
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Someone please help will mark as brainliest
Answers
Answer:
solution:-a homogenous mixture of two or more substances in relative amounts that can be varied continuously up to what is called the limit of solubility.
solute:-is a substance, usually a solid, that is dissolved in a solution, which is usually a liquid.
solvent:-substance, ordinarily a liquid, in which other materials dissolve to form a solution.
polar molecule:-is a molecule in which one end of the molecule is slightly positive, while the other end is slightly negative.
Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
concentration refers to the amount of a substance in a defined space.
Explanation:
I WILL MARK BRAINLY WHOLE SLIDE
Answers
intense heat waves and droughts
•FAMINE
•FOREST FIRES
powerful rain and snow STORMS
•FLOODING?? (could possibly be hurricane)
•Water borne and insect borne DISEASE
Increased HURRICANE (could possibly be flooding) and tornadoes DESTRUCTION of homes, ecosystems, and death.
I tried lol good luck though.
A publisher reports that 69% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 310 found that 64% of the readers owned a laptop. State the null and alternative hypotheses.
Answers
The null hypothesis (H0) is that the percentage of readers who own a laptop is equal to the reported percentage of 69%. The alternative hypothesis (Ha) is that the percentage of readers who own a laptop is different from 69%.
In statistical hypothesis testing, the null hypothesis represents the default assumption that there is no significant difference between the observed sample data and the expected population parameter. The alternative hypothesis, on the other hand, is the opposite of the null hypothesis and suggests that there is a significant difference between the observed sample data and the expected population parameter.
In this problem, the publisher reports that 69% of their readers own a laptop, which means the population proportion (p) is 0.69. The marketing executive wants to test if the actual percentage is different from the reported percentage. Therefore, we set up a two-tailed test. The null hypothesis (H0) is that the population proportion (p) is equal to the reported percentage (0.69). So, H0: p = 0.69. The alternative hypothesis (H1) is that the population proportion (p) is not equal to the reported percentage (0.69). So, H1: p ≠ 0.69.
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Explain the equilibrium law as it relates to chemical equilibrium. Describe the types of stresses that cause chemical reactions in equilibrium to make more products.
Answers
When a reaction has reached equilibrium with a given set of conditions, if the conditions are not changed, the reaction will remain at equilibrium forever. The forward and reverse reactions continue at the same equal and opposite rates and the macroscopic properties remain constant.
It is possible, however, to disturb that equilibrium by changing conditions. For example, you could increase the concentration of one of the products, or decrease the concentration of one of the reactants, or change the temperature. When a change of this type is made within a reaction at equilibrium, the reaction is no longer in equilibrium. When you alter something in a reaction at equilibrium, chemists say that you put stress on the equilibrium. When this occurs, the reaction will no longer be in equilibrium and the reaction itself will begin changing the concentrations of reactants and products until the reaction comes to a new position of equilibrium. How a reaction will change when a stress is applied can be explained and predicted. That is the topic of this section.
PLEASE HELP 100 POINTS!!!! AND GIVING BRAINLIEST!!!!!!!!
Why should a movie producer consider filming a new version of The First Men in the Moon? Create a 6-8 slide multimedia presentation to market your idea for this movie to a production company. Rubric Criteria Points Possible 20 (10) 11-19 (6-9) 6-10 (3-5) 0-5 (0-2) Points Earned Ideas & Content Relates Theme of Novel Provides analysis of character Accurate diagram of plot 20 Establishes a theme, relates an analysis of the protagonist, effectively summarizes the plot, and maintains a clear focus throughout. Establishes a theme, identifies some character traits of the protagonist, provides a summary of the plot, and maintains focus throughout. There are a few lapses in focus, but the theme is fairly clear. Presents somewhat of an analysis of character. The plot summary is mostly correct. It is difficult to figure out the theme of the novel. The character analysis is poor or not present. The plot summary does not accurately represent the story. Organization Structure Precision Focus 20 Strong organization; seamless transitions between ideas; Effective and precise content. Organization is appropriate but conventional; Attempt at a focused and precise sales pitch. Attempts at organization, inappropriate use of lists or bullets; content is unfocused and ideas are not developed No clear organizational framework or transitions. Ideas are vague or unfocused Voice Personality Sense of audience 20 Strong awareness of audience in the design. Students can clearly explain why they felt the vocabulary, audio and graphics chosen fit the target audience. Some awareness of audience in the design. Students can partially explain why they felt the vocabulary, audio and graphics chosen fit the target audience. Some awareness of audience in the design. Students find it difficult to explain how the vocabulary, audio and graphics chosen fit the target audience. Limited awareness of the needs and interests of the target audience. Images and Music Relevance to theme Effectiveness Imagery 10 Images and music stir a rich emotional res
Answers
Answer:-Science have researched more facts and cool things about it-It would have more facts and things to learn-The quality would be better and more understandingI just tried 3 quick ideas I hope it can help a bit
Explanation:
Answer:
the answer is you should know this already :)))))))))))))))))))))))))))))))))))))))))))))))))))
At what rate does magma deep below Earth's surface cool? What size of crystal results from magma cooling deep below Earth's surface?
O A. Slowly, large crystals form
B Quickly, large crystals form
C. Slowly, small crystals form
D. Quickly, small crystals form
Answers
Answer:
i think it is A
Explanation:
i got this answer from a good friend
The magma deep below Earth's surface cool slowly.Large crystals form results from magma cooling deep below Earth's surface. Therefore, option A is correct.
What is magma ?Magma is the molten or semi-molten natural material that gives rise to all igneous rocks. Magma can be found beneath the Earth's surface, and evidence of magmatism has been discovered on other terrestrial planets and natural satellites.
When magma slowly cools deep within the crust, the resulting rock is known as intrusive or plutonic. Because of the slow cooling, crystals can grow large, giving intrusive igneous rock a coarse-grained or phaneritic texture. Individual crystals in phaneritic texture can be seen with the eye.
Intrusive igneous rocks form when magma slowly cools and solidifies beneath the Earth's surface. Large, well-formed crystals are found in intrusive igneous rocks such as granite, gabbro, diorite, and dunite.
Thus, option A is correct.
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6. Within how many hours are fingerprints still considered "fresh"? *
16 hours
O 48 hours
O24 hours
O 8 hours
Answers
Answer:
actually it depends on when and on what you had the finger print it could stay a couple of days, weeks or months and still be considered fresh
1. Describe at least 4 ways in which the periodic table is arranged (must include rows & columns).
2a. Explain what makes metals more reactive and how to predict their reactivity from the periodic table.
2b. Do the same for non-metals. (explain)
Answers
1) The periodic table could be arranged;
a) in terms of groups and periods
b) In terms of metals and non metals
c)In terms of blocks to which elements belong
d) In terms of reactivity of the elements
2a) Metals are more reactive based on how easily they donate electrons
2b) Non metals are more reactive based on how easily they accept electrons.
What is the periodic table?In the periodic table we have the arrangement of elements and these elements do not all combine with each other in the same way. We know that the metals are the elements that we see towards the left hand side while the non metals are seen towards the right hand side.
Metals are more reactive if they are able to loose electrons easily while the nonmetals are more reactive if they are able to gain electrons more easily. Thus the loss and gain of electrons is what determines reactivity.
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A 2 kg bowling pin is at rest. A 6 kg bowling ball is rolling towards it at 10 m/s. If the ball
transfers all of it's momentum to the pin, what is the velocity of the pin after the collision?
Answers
P1 = P2 and since momentum is conserved, 21 = (6.0)(2.77) + (0.70). (vpin). 4.38 = 0.70 vpin, vpin = 6.3 m/s to the right, 21 = 16.62 + 0.70 vpin,
How do you determine a bowling ball's force?The bowling ball is solely affected by friction, hence Ff is used in place of F and equals mass times acceleration. The normal force (mass times gravity) multiplied by the friction coefficient equals the friction force, which also equals mass times acceleration.
How is ball velocity determined?The falling ball travels a distance of d = 12 9.8 (m/s2) t2, with a speed of v = 9.8 (m/s2) t as a function of time. The ball travels 4.9 m in a second. The falling ball's velocity is v = -9.8 (m/s2) t j, and its position is r = (4.9 m - 12 9.8 (m/s2) t2) j as a function of time.
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If 11 kJ of heat is transferred to 2300 g of soil at 21°C, what would the new temperature of the soil be?
Answers
Answer:
26.98°C
Explanation:
Applying,
Q = cm(t₂-t₁)................ Equation 1
Where Q = Heat transferred to the soil, c = specific heat capacity of dry soil, m = mass of the soil, t₂ = final temperature, t₁ = initial temperature.
From the question,
Given: Q = 11 kJ = 11000 J, m = 2300 g = 2.3 kg, t₁ = 21°C
Constant: c = 800 J/kg.°C
Substitute these values into equation 1
11000 = 800×2.3(t₂-21)
Solving for t₂
t₂-21 = 11000/(800×2.3)
t₂-21 = 11000/1840
t₂-21 = 5.98
t₂ = 5.98+21
t₂ = 26.98°C
Which compound is a hydrocarbon?
C 2 H 6
H 2 O
CO 2
C 6 H 12 O 6
Answers
Answer:
C2H6 OR C6H12O6 THE ANSWER
Explanation:
C2H6
!!!!!!!!!!
because it has both hydrogen and carbon as given in the word "Hydro-carbon"
Calcium carbonate reacts with hydrochloric acid:
CaCO3 + 2HCl →→ CaCl2 + CO2 + H2O
Calculate the number of moles of
hydrochloric acid required to react exactly
with 5g of calcium carbonate.
Answers
Answer:
0.1 mole
Explanation:
According to the formula, 1 mol of CaCO3 will require 2 mol of HCl
Molar mass of CaCO3 = 40.08 + 12.01 + 3(16.00) = 100.09 g/mol
so the 5g of CaCO3 equals : 5g x (1 mol/100.09g) = 0.0499 or 0.05 mol
so the mole of HCl required is: 0.05 x 2 = 0.1 mol
2MG+O2 ...........2MGO
AR=MG=40 , O=16
calculate the mass of maganissium to form log of maganissium oxide
Answers
1 mol = 24 g of Mg
X mol = 12 g of Mg
x = 0.5 moles of Mg
Mg :MgO = 1:1 (coefficient from equations using mole ratio)
So
0.5 moles of MgO
1 mol MgO = (24+16) g = 40 g
0.5 moles of MgO = 0.5 × 40
= 20 g of MgO produced
Changes in ocean currents and winds can greatly affect climate through which process?
solar flares
El Nino/La Nina
pollution
plant growth
Answers
Answer:
The correct answer is B) El Nino/La Nina
Explanation:
El Nino and La Nina are climate patterns that can cause modification to the global weather conditions. They are present in the Pacific Ocean.
El Nino is Spanish for Little Boy. It is characterised by warm weather, while La Nina in Spanish refers to Little Girl. La Nina is characterized by cool/cold currents.
Cheers
Answer:
temperature
Explanation:
In monosodium glutamate, calculate the percent of mass due to sodium.
Answers
The percentage by mass due to sodium in monosodium glutamate, C₅H₈NO₄Na is 15.75%
How do I determine the percentage of sodium?Percentage composition is defined as by the following formula:
Percentage = (mass of substance / mass of compound) × 100
Next, we shallm determine the mass of one mole of monosodium glutamate, C₅H₈NO₄Na. This is shown below:
1 mole of C₅H₈NO₄Na = (5 × 12) + (8 × 1) + 14 + (4 × 16) + 23 = 146 gFinally, we shall determine the percentage of sodium in the compound. Details below:
1 mole of C₅H₈NO₄Na = 146 gMass of sodium, Na in C₅H₈NO₄Na = 23 gPercentage of sodium, Na =?Percentage of sodium = (mass of sodium / mass of C₅H₈NO₄Na) × 100
Percentage of sodium = (23 / 146) × 100
Percentage of sodium = 0.1575 × 100
Percentage of sodium = 15.75%
Thus, the percentage of sodium is 15.75%
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Determine the hydroxide ion concentration in a solution that is 0.00014 M HCl
Answers
To determine the hydroxide ion concentration in a solution of hydrochloric acid (HCl), one needs to consider that HCl is a strong acid that completely dissociates in water, forming hydronium ions (H3O+) and chloride ions (Cl-).. the hydroxide ion concentration in the solution of 0.00014 M HCl is approximately 7.14 x \(10^-^1^1\) M.
Here the calculation is below<
[H3O+] = 0.00014 M [OH-] = [H3O+] (since the solution is neutral)
Using Kw = [H3O+][OH-], one can substitute the values:
(1.0 x \(10^-^1^4\)) = (0.00014)([OH-])
Rearranging the equation to solve for [OH-]:
[OH-] = (1.0 x \(10^-^1^4\)) / (0.00014)
Calculating the value:
[OH-] ≈ 7.14 x \(10^-^1^1\) M
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Which rocky planets is the most different to Earth's? Why? mark you as brainlist
Answers
Mercury, Venus, and Mars are all rocky planets. None are more or less different than Earth. Earth is the largest and the only planet with extensive regions of liquid water.
Explanation:
Answer:
En nuestro sistema solar, hay cuatro planetas terrestres, que también son los cuatro más cercanos al sol: Mercurio, Venus, Tierra y Marte. Durante la formación del sistema solar, probablemente hubo más planetoides terrestres, pero se fusionaron entre sí o fueron destruidos.
A gas is known to be one of the following nitrogen oxides: NO, NO2, N2O4, or N2O. It has a density of 1.96 g/L at 273 K and 1.00 atm. Determine its identity.
Please write out the steps too, I am so lost on how to start this question. Thank you so much!
Answers
That the calculated molar mass of the gas is closest to the molar mass of N2O. Therefore, the gas is most likely N2O.
What is Density?
Density is a physical property of matter that describes how much mass is contained in a given volume. It is defined as the amount of mass per unit volume, and is typically expressed in units of grams per cubic centimeter (g/cm3) or kilograms per cubic meter (kg/m3).
The gas density and the conditions provided can be used to calculate the molar mass of the gas using the ideal gas law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
Rearranging this equation to solve for n/V, we get:
n/V = P/RT
M = m/n
where M is the molar mass, m is the mass of the gas, and n is the number of moles.
Since the density is given in grams per liter, we can assume that 1 liter of the gas has a mass of 1.96 grams. Therefore, the number of moles of the gas in 1 liter can be calculated as:
n/V = P/RT = (1 atm)/(0.08206 L·atm/mol·K × 273 K) = 0.0446 mol/L
The number of grams of the gas in 1 liter can be calculated as:
m = density × volume = 1.96 g/L × 1 L = 1.96 g
Therefore, the molar mass of the gas is:
M = m/n = 1.96 g / 0.0446 mol = 43.9 g/mol
Comparing this molar mass to the molar masses of the possible nitrogen oxides:
NO has a molar mass of 30.01 g/mol
N2O4 has a molar mass of 92.01 g/mol
N2O has a molar mass of 44.01 g/mol
We can see that the calculated molar mass of the gas is closest to the molar mass of N2O. Therefore, the gas is most likely N2O.
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Which of the following represents the second ionisation
energy of boron?
A B(g) → B²*(g) + 2e AH = + 2427 kJ mol-¹
B B*(g) → B²*(g) + e AH = + 2427 kJ mol-¹
C B(g) → B²(g) + 2e AH = -2427 kJ mot¹
D B*(g) → B²+ (g) + e AH = -2427 kJ mol-¹
E
Answers
Hope this helps
What is the molar mass of KNO3?
Answers
Answer:
K=39, N=14, O=16. So molar mass of KNO3= 39+14+3(16)= 101
Im Wrong?
What is the difference between the atomic number and the atomic mass?
Answers
Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus. It is the average weight of an element. It is the total number of nucleons in the atom's nucleus.
Explanation:
Hope this helps have a great day its kinda hard to put it in one sentence so uhh just read this and make it into one sentence
Answer:
atomic number is equal to no.of protons or no.of electrons and no.of neutros+atomic num=atomic mass
Explanation:
in above give the correct explanation
What is the wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77%?
Answers
The wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77% is 16°C.
What is relative humidity ?Relative Humidity (RH) is a ratio of the quantity of atmospheric moisture that is actually present to the amount that would be present if the air were saturated, expressed in percent.
In relation to the maximum amount of water vapor that the air can hold at a specific temperature. A value of 50% relative humidity, for instance, indicates that there is only 50% as much water vapor present as there would be if the air were saturated at that temperature.
Td = T - ( 100 - RH ) ÷ 5.)
where, Td is dew point temperature, T is observed temperature, and RH is relative humidity.
by using the above formula
Td=26 - ( 100 - 50 ) ÷ 5
=26 - 50 ÷ 5
=26-10
Td = 16°C
Thus, The wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77% is 16°C.
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someone help me please i’ll give brainly
Answers
Answer:
Convection
Explanation:
▶ Convection is the transfer of heat through a gas or a liquid. The gas in this case would be the air passing through the heat and moving in a large quantity that then heats the hair.
It may be all of the above since the hair dryer is using both convection and conduction produce hot air but it says clearly so im assuming its Convection.
Brainly is appreciated! Hope I helped!
3. The solubility of salt (NaCl) in water at room temperature is 35.9 grams of NaCl per 100
grams of water. What will happen if 50 grams of NaCl are stirred into 100 grams of water?
Answers
Based on the solubility of salt (NaCl) in water at room temperature which is 35.9 grams of NaCl per 100 grams of water, if 50 grams of NaCl are stirred into 100 grams of water, there will remain an excess of undissolved sodium chloride in the solution.
What is the solubility of a solute?The greatest concentration of a solute that may dissolve in a solvent at a specific temperature is known as the solubility of that solute.
There are three types of solutions based on the amount of dissolved solute:
unsaturated solutions saturated solutions supersaturated solutionsThe solution is deemed saturated when the solute concentration reaches its maximum.
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How many ml of a 0.50 m solution can you obtain from the dilution of 140.8 ml of a 0.92 molar solution?
Answers
You can obtain approximately 258.56 ml of a 0.50 M solution by diluting 140.8 ml of a 0.92 M solution.
To determine the volume of a 0.50 M solution obtained from diluting 140.8 ml of a 0.92 M solution, we can use the formula for dilution:
C₁V₁ = C₂V₂
Where:
C₁ = initial concentration
V₁ = initial volume
C₂ = final concentration
V₂ = final volume
We need to solve for V₂, the final volume of the 0.50 M solution.
Given:
C₁ = 0.92 M
V₁ = 140.8 ml
C₂ = 0.50 M
Rearranging the formula, we have:
V₂ = (C₁ * V₁) / C₂
Substituting the given values, we get:
V₂ = (0.92 M * 140.8 ml) / 0.50 M
The units of moles cancel out, leaving us with the final volume in ml:
V₂ = (0.92 * 140.8) / 0.50
V₂ ≈ 258.56 ml
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