Answers
For this gas phase equilibrium shown below, 6 mol of C is placed in a 2.5 L flask and allowed to equilibrate. If the equilibrium constant for this reaction is 2.50, what are the final concentrations for all the three gases?
A + B <-----> C
We place 6 mol of C in a 2.5 L flask. So its molarity is:
molarity of C = 6 mol / 2.5 L
molarity of C = 2.4 M
The equilibrium constant for that reaction can be expressed like this:
Keq = [C] / ( [A] * [B] )
To solve the problem we have to set up an ICE table:
A + B <-----> C
I 0 0 2.4 M
C x x - x
E x x 2.4 M - x
Replacing those values in the Keq (Keq = 2.50):
Keq = [C] / ( [A] * [B] )
2.50 = (2.4 - x) / (x * x )
2.50 = (2.4 - x) / (x²)
And we have to solve that equation for X:
2.50 * x² = 2.4 - x
2.50 *x² + x - 2.4 = 0
This equation has 2 roots:
x₁ = -1.2 and x₂= 0.8
We can't have a negative concentration, so -1.2 is not our answer, then we use 0.8 M.
From the ICE table we said that the equilbrium concentrations are:
[A] = x = 0.8 M [B] = x = 0.8 M [C] = 2.4 M - x = 2.4 M - 0.8 M = 1.6 M
Answer: the final concentrations are [A] = 0.8 M [B] = 0.8 M [C] = 1.6 M
Related Questions
How many moles of aluminum ions al3+ are present in 0.42 mol of al2so43
Answers
There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.
To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.
The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.
Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:
Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)
Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2
Moles of Al3+ = 0.84 mol Al3+
Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.
It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.
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Which of the following aqueous solutions will have the lowest freezing point?A) 0.5 m C12H22O11(sucrose)B) 0.5 m Ca(NO3)2C) 0.5 m NiSO4D) 0.5 m Li3PO4
Answers
A) 0.5 M \(C_{12}H_{22}O_{11}\) (sucrose) will have the lowest freezing point.
Freezing point depression is a colligative property that occurs when solutes are added to a solvent, such as water. The more solute particles in solution, the lower the freezing point of the solution. Because \(C_{12}H_{22}O_{11}\)(sucrose) is a non-ionic, high molecular weight compound, it will have the greatest effect on lowering the freezing point compared to the other ionic compounds listed.
Therefore, 0.5 M \(C_{12}H_{22}O_{11}\) (sucrose) will have the lowest freezing point.
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what is the original pressure of a 750 ml sample of He at 0 degrees Celsius if it exerts 2 atm at 25 degrees Celsius and 500 ml
Answers
To determine the original pressure of a 750 ml sample of helium (He) at 0 degrees Celsius, we can use the combined gas law, which relates the initial and final conditions of a gas sample. The combined gas law equation is:
(P1 × V1) / (T1) = (P2 × V2) / (T2)
Where:
P1 and P2 are the initial and final pressures, respectively.
V1 and V2 are the initial and final volumes, respectively.
T1 and T2 are the initial and final temperatures, respectively.
Let's assign the given values:
P1 = unknown (original pressure)
V1 = 750 ml (initial volume)
T1 = 0 degrees Celsius (initial temperature)
P2 = 2 atm (final pressure)
V2 = 500 ml (final volume)
T2 = 25 degrees Celsius (final temperature)
Before using the combined gas law equation, we need to convert the temperatures to Kelvin scale by adding 273.15 to both T1 and T2:
T1 = 0 + 273.15 = 273.15 K
T2 = 25 + 273.15 = 298.15 K
Now we can plug in the values into the combined gas law equation:
(P1 × 750 ml) / (273.15 K) = (2 atm × 500 ml) / (298.15 K)
To solve for P1, we can cross multiply and rearrange the equation:
P1 = (2 atm × 500 ml × 273.15 K) / (750 ml × 298.15 K)
P1 = 0.924 atm
Therefore, the original pressure of the 750 ml sample of helium at 0 degrees Celsius is approximately 0.924 atm.
How many grams of solute would you use to prepare the following solutions?1.08 L of 0.438 M glucose (C6H12O6) Express your answer with the appropriate units.
Answers
Answer
85.22 grams of glucose
Procedure
Data: 180.156 g/mol (glucose molecular weight)
To solve this question you will need to convert the glucose from moles to grams using the molecular weight, also considering the volume of the solution. This is done as follows;
\(1.08\text{ L solution}\frac{0.438\text{ moles glucose}}{1\text{ L solution}}\frac{180.156\text{ g glucose}}{1\text{ mol glucose}}=85.22\text{ grams of glucose}\)Write in exponential form: 34⋅34⋅34⋅34⋅34⋅34⋅34⋅34.
Answers
Answer:
34^8
Explanation:
If dinitrogen pentoxide decomposes as follows: 2 N₂O5(g) → 4NO2(g) + O2(g) If the reaction rate is expressed as: rate = k [N₂0513, then the overall reaction order is: (Enter your answer as a number. (i.e. as "5" not "five"))
Answers
The order of reaction can be known from the rate equation.
What is the overall order of reaction?
The question is incomplete but I will try to explain the concept of order of reaction to you.
We have to note that when we talk about the order of the reaction what we mean is the order that we can be able to obtain from the stoichiometry of the reaction.
We do not only look at the reaction equation as we try to obtain the order of reaction but we rely so heavily on the empirical data that we can get from the reaction for the order of reaction in each specie.
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Finally, examine the atomic spectrum below. Estimate the wavelength
of each spectral line, then use that collection of wavelengths to try and
determine the identity of the element using the internet. This is the
kind of work a graduate student in chemistry might be assigned to do.
400
450
500
650
700
750
550 600
wavelength (nm)
Identity of the element
Answers
The estimated wavelengths and identities of the elements of spectral line in the given atomic spectrum is:
blue spectral line - 470 nm; Iron green spectral line - 490 nm; Magnesium yellow spectral line - 610 nm; Sodiumred spectral line - 660 nm; HydrogenWhat is an atomic spectrum?Atomic spectrum is the spectrum of frequencies or wavelengths of radiations absorbed or emitted when electrons transitions between on energyblevel to another.
The estimated wavelengths as well as identities of the elements of spectral lines shown above are as follows
blue spectral line - 470 nm; green spectral line - 490 nm; Ironyellow spectral line - 610 nm; Sodiumred spectral line - 660 nm; HydrogenTherefore, the wavelengths and colors of the spectral line in an atomic spectrum is useful in identifying elements.
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Which two statements best describe the methods in the table?
UDP will increase the amount of fertilizer used and help save money on labor.
Precision management allows farmers to save money in the beginning but spend more in the future.
Compared to precision management, UDP will most likely reduce the amount of nitrogen pollution from runoff.
Precision management can help farmers use less fertilizer by targeting specific areas in the farmer's fields.
Answers
By focusing on certain fields, precision management can assist farmers in using less fertiliser. Option D is the right choice as a result.
In 1994, Precision Management was founded with the express purpose of offering customers comprehensive, effective, and personalised property management services while concentrating on and achieving their goals and objectives. Precision has developed friendships as well as commercial ties during the past 25 years. Our clients value Precision's distinctive, hands-on management approach and the company's overall commitment to their assets. By focusing on certain fields, precision management can assist farmers in using less fertiliser.
Therefore, the correct option is option D.
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What happens if you rub a balloon against wool and put it against water dripping from a cup
Answers
Answer:
The water bends due to the static electricity on the balloon.
Explanation:
The static electricity you built up by rubbing it against the balloon attracts the stream of water, bending it towards the comb or balloon like magic!
Negatively charged particles called electrons jump the wool to the balloon as they rub together, the comb now has extra electrons and is negatively charged. The water features both positive and negatively charged particles and is neutral. Positive and negative charges are attracted to each other so when you move the negatively charged balloon towards the stream, it attracts the water's positively charged particles and the stream bends!
Please help, its due today! I'll also make you brainiest (put them in an order that's simple, look at the picture and you'll see what I mean) Thank you and God bless! <33
On beaches there are often areas of grassy dunes where people are prohibited from walking. How do these protected areas preserve ecosystem services? Use the graphic organizer to categorize the following as either examples of land reclamation of protecting biodiversity.
Answers
Answer:
Preventing erosion – Land Reclamation
Protecting nesting areas – Protecting Biodiversity
Preventing littering – Land Reclamation
Preventing habitat disruption – Protecting Biodiversity
Protecting native species – Protecting Biodiversity
Preventing contamination of soil – Land Reclamation
Explanation:
I really hope I'm right! I tried my hardest, please give me brainliest :)
have a good day!
1. A 55.0g sample of iron(II) filings reacts with 23.8g of powdered sulfur (Sa). What is
the limiting reagent, excess reagent, and theoretical yield?
Answers
Due to its smaller quantity relative to iron(II) filings, sulphur acts as the limiting reagent in the reaction between iron(II) filings and iron. Since sulphur and iron(II) filings have a mole ratio of 1.74:1, we can determine the theoretical yield.
We calculate the amount of sulphur present in 0.742 mol by dividing the sulfur's mass (23.8 g) by its molar mass (32.06 g/mol). This is multiplied by the mole ratio, which results in a theoretical yield of 1.33 mol.
By dividing the moles of iron(II) filings (0.983 mol) by their molar mass (55.85 g/mol), one may calculate the theoretical yield of iron(II) filings, which is 54.6 g. Calculated as the difference between the original amount and the predicted yield (55.0 g - 54.6 g), the surplus iron(II) filings total 0.4 g.
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What is the % Nitrogen in Nitrate?
Answers
Answer:
22.6 percent
Explanation:
Nitrate is one part nitrogen plus three parts oxygen so nitrogen only makes up about 22.6 percent on the nitrate ion.
Answer: 22.6%
Explanation: sorry if im wrong
iii. Balance the equations for atoms O and H using H₂0 and H*. (.5 point)
Answers
the coefficient in front of H2O and so that you have an even number of oxygen
to balance H2O = H2 + O2 you will need to be sure to count all of H and O atoms on each side of the chemical
Forming glycogen, which is a polymer, from glucose monomers is an example of
A. oxidation
B. anabolism
C. catabolism
D. an acid-base reaction
E. an enzyme reaction
Answers
Forming glycogen, which is a polymer, from glucose monomers is an example of anabolism
What is anabolism?Anabolism is a metabolic process that involves building larger molecules from smaller ones, typically using energy from metabolic pathways. This process is the opposite of catabolism, which is the breakdown of larger molecules into smaller ones.
Anabolic reactions play a crucial role in the growth and maintenance of cells and tissues, as well as in the storage of energy in the form of glycogen, fat, and other compounds.
Anabolic processes are responsible for the synthesis of proteins, nucleic acids, and other complex molecules that make up cells and tissues, and they also play a role in the regulation of various physiological processes, such as growth and development, energy metabolism, and immune function.
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5. The rate of diffusion of a gas depends on its
molecular mass and the temperature.
Which combination of molecular mass and
temperature gives the slowest rate of diffusion?
molecular mass
temperature
A.high
high
B.low
low
C.high
low
D.high
low
Answers
Answer:
A
Explanation:
because rate of diffusion is inversely proportional to molecular mass
The combination of high molecular mass and low temperature gives the slowest rate of diffusion.The correct option is c.
When it comes to diffusion, the rate at which a gas spreads out depends on its molecular mass and temperature.
Molecular mass refers to the weight of the gas molecules. The larger the molecules, the slower they move and the slower they diffuse. Therefore, gases with higher molecular mass diffuse more slowly than those with lower molecular mass.
Temperature also affects the rate of diffusion. At higher temperatures, gas molecules have more energy and move faster, resulting in a faster diffusion rate. On the other hand, at lower temperatures, gas molecules have less energy and move slower, leading to a slower diffusion rate.
So, when we combine high molecular mass and low temperature, we have both factors working against a fast diffusion rate. The gas molecules are heavy, which slows down their movement, and the low temperature reduces their energy and speed. As a result, this combination gives us the slowest rate of diffusion.
In summary, the combination of high molecular mass and low temperature gives the slowest rate of diffusion.The correct option is C.
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How do molecules of element and molecules of compound differ?what theys are similar?
Answers
According to the research, the molecules of compound are combinations of chemical elements of different complexity, while the molecules of element are made up of atoms of the same type.
What are the molecules of compound and an element?The molecules of compound are a mixture, its elements can have any proportion interrelated by chemical bonds and maintain their properties, while the molecules of element is the set of atoms of the same type that cannot be broken down into simpler ones.
The molecules of compound and an element have a fixed and defined chemical composition, belonging to pure substances, where all the particles, atoms, molecules and/or elements that compose it are exactly the same.
Therefore, we can conclude that according to the research, the molecules of compound are combinations of chemical elements of different complexity, while the molecules of element are made up of atoms of the same type.
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If a penguin has to walk 70 miles at a rate of .75 meters per secound how many days does it take to make the trip
Answers
If a penguin has to walk 70 miles at a rate of .75 meters per second, 66 days do it take to make the trip.
What do you mean by speed ?The term speed is defined as the rate of change of position of an object in any direction. Speed is calculated as follows: speed = distance × time.
The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.
If you know how far something has traveled and how long it took to get there, you can calculate its average speed.
Time = distance / speed
distance = 0.75 meters
speed = 70 miles = 112.654 kilometres
Substitute this value in above formula
Time = 0.75 / 112.654
= 0.66
Thus, If a penguin has to walk 70 miles at a rate of .75 meters per second, 66 days do it take to make the trip.
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How many mililiters of a 6 00 M NaOH solution are needed to provide 0 330 mol of NaOH?
Answers
Answer:
55mL of sodium hydroxide are required.
Explanation:
Given data:
Molarity of NaOH solution = 6.00 M
Number of moles of NaOH = 0.330
Volume required = ?
Solution:
Formula:
M = n/v
M = molarity
n = number of moles
v = volume
Now we will put the values in formula.
6.00 M = 0.330 mol / v
v = 0.330 mol / 6.00 M
v = 0.055 L (M = mol/L)
v = 0.055 L × 1000 mL/ 1L
v = 55 mL
55mL of sodium hydroxide are required.
using the calibratiomn curve below, determine the concentration of copper sulfate solution if its absorbance reading is 0.280 at 650mm.
Answers
The concentration of copper sulfate solution is 11ppm.
The calibration curve for copper sulfate is shown in the figure below.
copper sulfate is a compound of copper and sulfuric acid with the chemical formula CuSO4.To find the concentration of copper sulfate solution with an absorbance reading of 0.280 at 650 mm, we can use the equation:
Concentration (ppm) = m x absorbance + b,
where m is the slope of the graph and b is the y-intercept of the graph.
Using the graph, we can calculate m and b as follows:
\(m =\frac{ (20 - 0)}{(0.750 - 0.250)} = 40\\b = 0 - (40 *0.250) = -10\)
Therefore, the concentration of copper sulfate solution with an absorbance reading of 0.280 at 650 mm is:
Concentration (ppm) = \(40 * 0.280 - 10 = 11 ppm\)
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HBrO (aq) + H2O (l) ⇋ H3O+ (aq) + BrO- (aq)
If the value of Kc for this process is 5.2 x 10-5, there is no H3O+ or BrO- initially present, and the initial [HBrO] = 0.749 M, what will be the concentration of BrO- at equilibrium?
HINT: you should not use the quadratic formula for this problem.
7.67 x 10-3 M
9.01 x 10-3 M
5.17 x 10-3 M
4.29 x 10-3 M
6.24 x 10-3 M
Answers
Answer:
6.24 x 10-3 M
Explanation:
Hello,
In this case, for the given dissociation, we have the following equilibrium expression in terms of the law of mass action:
\(Ka=\frac{[H_3O^+][BrO^-]}{[HBrO]}\)
Of course, water is excluded as it is liquid and the concentration of aqueous species should be considered only. In such a way, in terms of the change \(x\), we rewrite the expression considering an ICE table and the initial concentration of HBrO that is 0.749 M:
\(5.2x10^{-5}=\frac{x*x}{0.749-x}\)
Thus, we obtain a quadratic equation whose solution is:
\(x_1=-0.00627M\\x_2=0.00624M\)
Clearly, the solution is 0.00624 M as no negative concentrations are allowed, so the concentration of BrO⁻ is 6.24 x 10-3 M.
Best regards.
Answer:
6.24×10¯³ M
Explanation:
Step 1:
The equation for the reaction is given below:
HBrO (aq) + H2O (l) ⇋ H3O+ (aq) + BrO- (aq)
Step 2:
The following data were obtained from the question:
Equilibrium constant, Kc = 5.2x10^-5
Concentration of HBrO, [HBrO] = 0.749 M
Concentration of BrO-, [BrO-] =?
Step 3:
Determination of the concentration of
BrO-.
We can obtain the concentration of BrO- as follow:
Initial concentration:
[HBrO] = 0.749 M
[H3O+] = 0
[BrO-] = 0
During reaction:
[HBrO] = - y
[H3O+] = +y
[BrO-] = +y
After reaction:
[HBrO] = 0.749 - y
[H3O+] = y
[BrO-] = y
Applying the equation constant equation:
Kc = [H3O+] [BrO-] / [HBrO]
5.2x10^-5 = y × y / 0.749
5.2x10^-5 = y² / 0.749
Cross multiply
y² = 5.2x10^-5 x 0.749
Take the square root of both side
y = √(5.2x10^-5 x 0.749)
y = 6.24×10¯³ M
[BrO-] = y = 6.24×10¯³ M
Therefore, the the concentration of BrO- at equilibrium is 6.24×10¯³ M
Guysss how to explain nuclear chemistry? And define nuclear chemistry ?
Answers
Answer:
How do amoeba respire.
Define Diffusion.
Water boils at 100 degrees Celsius. What is the boiling point for water on the Kelvin scale? K = °C + 273 and °C = K - 273
Answers
Answer:
the answer is 373
Explanation:
K=°C + 273
K=100+273=373
How many moles of gas are in a 25 L container if the temperature is 289 K and the pressure is 125 atm?
Answers
Answer:
1.3 moles
Explanation:
pv = nrt
n = pv/rt
n = (125 * 25) / (8.3144598 * 289)
n = 1.3 moles
Air pressure is measured in pascals. For a professional American football game, the ball should be inflated to about 90,000 pascals. Scientists studied the effects of air temperature on the pressure inside American footballs by taking these steps:
1. Prepare 100 footballs.
2. Measure each football's air pressure.
3. Divide footballs into 10 groups.
4. Place the groups in different lockers cooled to different air temperatures.
5. After 12 hours, remove the footballs from lockers.
6. Measure each football’s pressure again.
7. Compare the new pressures to the starting pressures.
What two terms best describe the variable "air pressure inside the football" in this experiment?
independent, qualitative
independent, quantitative
dependent, qualitative
dependent, quantitative
Answers
The variable "air pressure inside the football" in this experiment is quantitative and dependent variable. Hence, option D is correct.
What is the dependent variable?The dependent variable is the variable that is being measured or tested in an experiment.
In the experiment, the scientist filled the footballs with fix quantity of pressure which was then kept for 12 hours. After 12 hours the pressure inside the footballs was again measured. Pressure here is a quantitative variable.
Since the air temperature is an independent variable. The pressure being the dependent variable depends upon the temperature of the air.
Independent variable; The variable which does not depends upon any other variable.
Dependent variable; The variable which depends upon the independent variable or varies with the change independent variable.
Qualitative variables are variables which cannot be expressed in form of numbers. They generally convey the characteristic, category, quality or type.
Whereas Quantitative variables are the variables which can be expressed in the form of numbers. These are the variables which exist along the continuous sequence.
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If you have 23.8g of CaCl2, how many formula units is it
Answers
Answer:
1.3×10²³ formula unit
Explanation:
Given data:
Mass of CaCl₂ = 23.8 g
Number of formula unit = ?
Solution:
Number of moles = mass/molar mass
Number of moles = 23.8 g/110.98 g/mol
Number of moles = 0.21 mol
1 mole of any substance contain 6.022×10²³ formula unit
0.21 mol × 6.022×10²³ formula unit / 1mol
1.3×10²³ formula unit
Consider a gas in a cylinder that is thermally isolated from the environment. The upper part of the cylinder is a moveable piston of negligible weight. The height of the cylinder is 30 cm. The outside pressure is 105 Pa. The temperature of the gas is 250 K. The volume filled by the gas is 1.5 l. How many moles of the gas are in the container
Answers
The number of mole of the gas in the container is 7.58×10¯⁵ mole
From the question given above, the following data were obtained:
Temperature (T) = 250 K
Volume (V) = 1.5 L
Pressure (P) = 105 Pa = 105 / 1000 = 0.105 KPa
Gas constant (R) = 8.314 L.KPa/Kmol
Number of mole (n) =?The number of mole of the gas in the container can be obtained as by using the ideal gas equation as illustrated below:
PV = nRT0.105 × 1.5 = n × 8.314 × 250
0.1575 = n × 2078.5
Divide both side by 2078.5
n = 0.1575 / 2078.5
n = 7.58×10¯⁵ moleTherefore, the number of mole of the gas in the container is 7.58×10¯⁵ mole
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Anyone mind answering this
Answers
what is the similarities of freezing of water and electrolysis of water
Answers
Answer:
Electrolysis of water is the process of using electricity to decompose water into oxygen and hydrogen gas. Hydrogen gas released in this way can be used as hydrogen fuel, or remixed with the oxygen to create oxyhydrogen gas, which is used in welding and other applications.Ordinarily, the freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs or if there are impurities present in the water which could cause freezing point depression to occur. Under certain conditions, water may remain a liquid as cold as -40 to -42°
Explanation:
A) 24 g
B) 36 g
C) 48 g
D) 60 g
Answers
Answer: b 36 g
Explanation:
Question 2
A proton and an electron move further apart from each other. Does the electrostatic
potential energy associated with their interaction increase or decrease?
O Increase
O Decrease
Answers
Answer:
decrease
Explanation:
because they're not the same