1-Which of the following statements is not a description of Saturn?
Known for its rings
Largest planet in the solar system
One of the gas giant planets
Has several moons
2-Which of the following statements is not a description of Mars?
Has a reddish color
Has a thin atmosphere
One of the rocky planets
Has no moons
3-Planets move around the sun in elliptical orbits.
True
False
4-Which of the following statements is not a description of asteroids?
They orbit the sun.
They vary in size and shape.
Most of them lie in a belt between Earth and Mars.
They are thought to be remains that never formed a planet.
5-According to the chart below, which planet has the smallest inner core? (look at image)
Mars
Jupiter
Venus
Earth
6-Two planets are orbiting a star. Planet A is closer to the star than Planet B. Which description explains the expected motion of Planets A and B?
The average speed of Planet B is faster than that of Planet A.
The average speed of Planet B is equal to that of Planet B.
The orbital period of Planet B is shorter than that of Planet A.
The orbital period of planet A is shorter than that of Planet B.
Answers
Answer:
1. Largest planet in the solar system.
2. Has no moons.
3. True
4. Most of them lie in a belt between Earth and Mars.
5. Earth
6. The orbital period of planet A is shorter than that of Planet B.
Explanation:
1. Saturn is the second largest planet of the solar system. It is a gaseous planet which is known as the Ringed planet because of the beautiful ring system which are visible from Earth through telescope. It has several moons - more than 60 moons.
2. Mars is known as red planet. It is the fourth planet from the sun. It is one of the rocky planets having very thin atmosphere. It has two moons - Phobos and Deimos.
3. From Kepler's first law of planetary motion we know that planets move around Sun in an elliptical orbit with sun at its foci. Thus, the given statement is true.
4. Asteroids are irregular shaped and sized rocky objects orbiting sun . These are thought to be remains of a never formed planet between Mars and Jupiter. Thus, majority of the asteroids are found between the orbits of these two planets.
5. There are four terrestrial planets ( Mercury, Venus, Earth and Mars). The terrestrial planets have the following layers- the core, the mantle and the crust. Out of these four planets- the Earth has the smallest inner core.
6. From Kepler's laws about planetary motion, we know that the planet closer to the Star moves with greater orbital speed and thus has shorter orbital period than the rest. Here, planet A is closer to the star than planet B. Thus, planet A would have shorter orbital period than planet B.
This detailed answer provides accurate explanations for each question, covering topics related to the description of Saturn, Mars, elliptical orbits, asteroids, planet cores, and orbital motion.
Explanation:
1- The statement 'Largest planet in the solar system' is not a description of Saturn. Saturn is actually the second-largest planet in our solar system, with Jupiter being the largest.
2- The statement 'Has no moons' is not a description of Mars. Mars actually has two moons, named Phobos and Deimos.
3- The statement is true. Planets do move around the sun in elliptical orbits. An elliptical orbit is a slightly elongated circle, and this is the shape followed by the planets in our solar system.
4- The statement 'They are thought to be remains that never formed a planet' is not a description of asteroids. Asteroids are actually rocky fragments that orbit the sun but are too small to be considered planets. Some asteroids may be remnants from the early formation of the solar system, but not all of them.
5- According to the chart, Venus has the smallest inner core. The chart shows that Venus has the smallest inner core compared to Mars, Jupiter, and Earth.
6- The description that explains the expected motion of Planets A and B is that the orbital period of Planet B is shorter than that of Planet A. When a planet is closer to the star, its orbital period is shorter, which means it completes its orbit more quickly than a planet that is farther away.
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Related Questions
Calculate the number of joules released when 72.5 grams of water at 95.0 degrees Celsius cools to a final temperature of 28.0 degrees Celsius.
Answers
95-28=67
72.5grams in kg is 0.0725kg
Energy = 67×0.0725×4200
Energy = 20,401.5 J or 20.4015 kJ
If horizontal layers of sedimentary rock have a vertical fault running through them, how might a geologist use relative dating to determine when the fault occurred ? Could scientists use absolute dating as well ? Why or why not ?
Answers
2. Yes, because they it is use to determine an age on a specified chronology in archaeology and geology. They can use these data to prove their theories.
Answer:
Scientists will be able to use relative dating and absolute dating to determine when the failure occurred.
Explanation:
Scientists will be able to use relative dating, because it is the method capable of determining an order of events that occurred in the past by relating the rock with that failure to a rock without failure or with different failures, without the need to determine an absolute age of when the failure happened, however revealing a relative, approximate date.
It will also be possible to use absolute dating, which will give a more precise age on the fault present in the rock, using a chronological age that will be determined by observing the physical and chemical properties of the rock. This technique shows the age of the event in numbers, as opposed to relative dating.
What are five characteristics of a group on the periodic table?
Answers
The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant.
N2O4(g) ⇌ 2 NO2(g) Kc = 1.46
5 N2O4(g) ⇌ 10 NO2(g) Kc = ?
A) 1.46
B) 0.292
C) 6.63
D) 1.08
E) 7.30
Answer: C,
Answers
Solution:
N2O4(g) ⇌ 2 NO2(g) Kc = 1.46
5 N2O4(g) ⇌ 10 NO2(g) Kc =?
If 1 atom of N2O4(g) is 1.46
So to get 5 atoms of N2O4(g), you will simply multiply it by 5.
1.46 x 5 = 7.30
Answer:
The answer is C) 6.63
Explanation:
When the coefficients in a balanced equation are multiplied by a factor, the resulting equilibrium constant is raised to this factor.
In this case, you have the following equilibrium:
N₂O₄(g) ⇌ 2 NO₂(g) Kc = 1.46
In which the coefficients are 1 (for N₂O₄) and 2 (for NO₂)
In the second equation, notice that you have the coefficients of the first equation multiplied by 5 (1 x 5= 5 for N₂O₄; 2 x 5= 10 for NO₂) :
5 N₂O₄(g) ⇌ 10 NO₂(g)
Thus, to obtain the equilibrium constant of the second equation (Kc'), you have to raise the first equilibrium constant (Kc) to 5:
K'c= (Kc)⁵= (1.46)⁵= 6.63
PLEASE HELP ASAP
In two or more complete sentences describe how atomic radius changes as you move down a group in the periodic table and why.
Answers
Answer:
When we move across the period from left to right then there is decrease in atomic radius.
This is due to increase in number of protons and electrons across a period. Since electrons are added in same energy level, therefore, they get pulled closer to the nucleus because of more number of protons which carry a positive charge.
As a result, there is shrinkage in size from left to right across the period.
Hope this helped!
Explanation:
The atomic radius increase as we move down the group in the periodic table because of the addition of a new principal shell.
What is the atomic radius?The atomic radius of an atom can be described as the shortest distance between the nuclei of the atom and the valence shell of the atom. An atomic radius is also specified as half the distance between two adjacent atoms of the same element directly bonded in a molecule.
In general, the atomic radius of an atom increases when we move down a group on the modern periodic table. In groups in the periodic table, the addition of a new principle shell as we move down. Therefore the distance between the nucleus and the outermost shell increases and the electronegativity decreases and the atomic radius increases.
In periods in the periodic table, the electrons are in the same valence shell therefore the atomic number of elements increases within the same period. While moving from left to right, the effective nuclear charge increases.
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How can you raise the average kinetic energy of the water molecules in a glass of water?
Answers
Final answer:
To rise the average kinetic energy of water molecules in a glass, you need to increase the water's temperature, which can be done by heating the water or increasing the room temperature. This is based on the principle that temperature is proportional to the average kinetic energy of the particles in a substance.
Explanation:
The average kinetic energy of water molecules in a glass can be raised by increasing the temperature of the water. This increase in temperature can be achieved in several ways, one of which is by increasing the temperature of the room, allowing heat energy to transfer from the environment to the water. It's important to note that replacing the water with a more dense fluid or adding more water will not increase the kinetic energy of the existing water molecules.
As detailed in the kinetic-molecular theory, temperature is directly proportional to the average kinetic energy of the particles in a substance. Thus, when water is heated, the molecules begin to move more rapidly, with more extensive vibrations and translations. This results in increased collisions between molecules and a higher average velocity and kinetic energy of the particles.
It's worth clarifying that kinetic energy is transferred from hot water molecules to colder substances like ice, but what we want in this scenario is to increase the kinetic energy of the water molecules themselves, which is done by applying heat to the water.
Temperature at which a substance goes from a solid to liquid
Answers
Radio stations identify themselves by their position on the radio dial such as 90.1 and 93.3. This number is based on the number of waves or cycles that pass a fixed point in a specific unit of time. To which property of a wave does this identification number refer? A. frequency B. wavelength C. loudness D. amplitude
Answers
Reason:The frequency of waves are determined by the amount of waves that pass a specific point in a certain period of time and Radio stations broadcast their signals at different frequencies so that the range of radio frequencies can be used by many stations.
The property of a wave is given as frequency
What is the frequency?Generally, Frequency is simply defined as the number of waves that pass through a fixed point in a given amount of time
In conclusion, for a number based on the number of waves or cycles that pass a fixed point in a specific unit of time, we refer to it as frequency
Read more about frequency
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The solubility of a salt in a given volume of water depends primarily on the
Answers
The solubility of a salt in a given volume of water depends primarily on the temperature of the water.
Solubility refers to the maximum concentration of a salt that a solution can have at a given pressure and temperature. Generally, solubility increases with temperature. This happens in the cases where the process of dissolving is endothermic (requires heat). Increasing temperature will increase the kinetic energy of the solvent molecules, which will break the intermolecular interactions between solute molecules more effectively.
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Pls hurry!!
If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in solution?
8.0 g
50 g
80 g
800 g
Answers
given mass of solution is 200g therefore mass of solute
= 4% of 200g
= 8g
therefore mass of solute = 8g
Answer : The correct option is, (a) 8.0 g
Solution : Given,
Percent of solute = 4 %
Mass of solution = 200 g
Mass by mass percent (m/m)% : It is defined as the mass of solute present in the mass of solution.
Formula used :
[tex](m/m)\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100[/tex]
Now put all the given values in this formula, we get the mass of solute.
[tex]4\%=\frac{\text{Mass of solute}}{200g}\times 100[/tex]
[tex]\text{Mass of solute}=8.0g[/tex]
Therefore, the mass of solute in solution is, 8.0 g
Sodium ions are used by your body every time you move a muscle. The difference between the Na+ ions and atomic Na is that A) ionic sodium has one more electron. B) atomic sodium has one more electron. C) atomic sodium has one fewer electron. D) ionic sodium is only found in the body.
Answers
B) atomic sodium has one more electron.
This can be easily seen if you compare the charges - ionic sodium carries one more positive charge than atomic sodium, so ionic sodium must have one fewer electron.
9.25 * 10^21 pennies if how many moles
Answers
that is 1 mole x ( 9.25 x10 ^21) / (6.02 x10^23) = 0.0154 moles
A student made this model of a carbon dioxide molecule. its has one carbon atom and two oxygen atoms what is the correct way to write the chemical name of carbon dioxide
Answers
Answer:
The chemical name of carbon dioxide is [tex]CO_2[/tex].
Explanation:
[tex]C+2O\rightarrow CO_2[/tex]
In a model of carbon dioxide made by the student there are one carbon atom and two oxygen atoms which means that total atoms in the molecule of carbon-dioxide is three.
While writing the chemical name of the carbon dioxide we will first write the symbol of the electropositive atom and then electronegative atom:[tex]CO_2[/tex]
The smallest particle from among the following is
A. Li+
B. F
C. F-
D. Li
Answers
Calculate the percent ionization of 0.0075 m butanoic acid (ka = 1.5 x 10-5) in a solution containing 0.085 m sodium butanoate.
Answers
C4H8O2(aq) +H2O(l) → C4H7O2(aq) + H3O +
initial 0.0075 0 0
change -X +X +X
final 0.0075-X X X
when Ka is relative smaller to the intial concentration of the acid so we can assume that 0.0075-X≈ 0.0075 by substitution in Ka formula:
Ka = [C4H7O2][H3O+] / [C4H8O2]
1.5x10^-5 = X*X / 0.0075
X^2 = 1.125x10^-7
X= 0.00034 m =3.4 x 10 ^-4 m
∴ [C4H7O2] = [H3O+] = 3.4X10^-4
∴ percent ionization = [H+ equlibrium]/[acid initial] *100
= 3.4X10^-4/0.0075 * 100
= 4.5 %
part 2) calculate the percent ionization of 0.0075m butanoic acid in a solution containing 0.085m sodium butanoic?
C4H8O2(aq) + H2O(l) ↔ C4H7O2(aq) + H3O+
initial 0.0075 0 0.085
change -X +X +X
final 0.0075-X X 0.085+X
we can assume that 0.0075-X≈ 0.0075 & 0.085+X ≈ 0.085
∴Ka = (X*(0.085)) / (0.0075)
(1.5x10^-5)*0.0075 = 0.085X
∴X = 1.3x 10^-6
∴ percent ionization = (1.3x10^-6)/0.0075 * 100 = 0.017 %
The percent ionization of the solution is 0.017%.
The steps involved are;
Write the reaction equationSetup the ICE tablemake the necessary calculationThe equation of the reaction is;
CH3CH2CH2COOH(aq) ⇄ H^+(aq) + CH3CH2CH2COO^-(aq)
I 0.0075 0 0.085
C -x +x + x
E 0.0075 - x x 0.085 + x
The Ka of the acid = 1.5 x 10^-5
Hence;
1.5 x 10^-5 = x(0.085 + x)/0.0075 - x
1.5 x 10^-5 (0.0075 - x ) = x(0.085 + x)
1.1 x 10^-7 - 1.5 x 10^-5x = 0.085x + x^2
x^2 + 0.085x - 1.1 x 10^-7 = 0
x = 0.0000013 M
Percent ionization= 0.0000013 M/0.0075 × 100/1
= 0.017%
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i only have 3 questions left for this, please help!!!!
QUESTION 3
Daughter atoms X and Y are formed from the fission of atom Z. Which of the following statements is true about X and Y?
The combined atomic mass of X and Y will be greater than the mass of atom Z.
The mass of element X will always equal the exact atomic mass of Z.
High temperatures are required to make atoms X and Y.
Atoms X and Y will have a smaller atomic mass than atom Z.
QUESTION 7
What is the type of material needed in nuclear power plants?
combustible
stable
fissile
low mass
3 points
QUESTION 8
Which of the following are properties of nuclear fission?
The energy produced is controllable.
It is the source of the sun’s energy.
The reaction requires high temperature conditions.
It is used in nuclear power plants.It is used in nuclear power plants.
Answers
Answer:
3: Atoms X and Y will have a smaller atomic mass than atom Z
7: Fissile
8: It is used in nuclear power plants
Explanation:
3
The process of nuclear fission is where one unstable atom (in this case atom Z) splits into two smaller atoms (atoms X and Y) and releases energy in the form of radiation.
Hence, the combined atomic mass of X and Y cannot be grater than the mass of atom Z, fission does not need to be at high temperatures to take place, and the mass of element X will never equal the mass of element Z.
7
In nuclear fission, the energy is produced by the decay of radioactive elements, and that energy can not be obtained by combustion. Stable elements will not undergo fission, and low mass elements tend to be very stable too.
8
The energy produced from nuclear fission is not always controllable, that is why disasters such as nuclear meltdowns happen, because the energy output cannot be controlled. The atoms in the sun undergo fusion, and not fission. Once again, nuclear fission does not require high temperatures (nuclear fusion does, hence why the sun has such a high temperature).
Look back at your data and your regression equation. (Sample data is shown to the right, with X= pressure and Y=volume.) click all statements that are true.
Answered.
Answers
To set up a scatter plot in Excel, enter the pairs of data in two columns with each value of a pair on the same row. By default, Excel considers the column on the left to contain the horizontal (X) values and the column on the right to contain the vertical (Y) values.
If you click on the + sign at the upper right of the chart, a list of checkboxes will appear. Check Axes, Axis Titles, and Trendline. Uncheck everything else. You should edit the Axis Titles to include the name of the factor and any units associated with it. Double-click on the Axis numbers to bring up the Format Axis dialog, then click on the bar-graph icon to access Axis Options. Set the bounds and units appropriately and set the tick marks to something sensible.
Answer:
ALL are true
Explanation:
In which case are the two atoms different isotopes of the same element?
Answers
When a 10 mL graduated cylinder is filled to the 10 mL mark, the mass of the water was measured to be 9.925 g. If the density of water is taken to be 0.9975 g/mL, what is the percent error for the 10 mL of water,
Answers
mass = 9.925 g
density = 0.9975 g/ml
density = [tex] \frac{mass}{volume} [/tex]
so actual volume = [tex] \frac{mass}{density} [/tex] = [tex] \frac{9.925}{0.9975} [/tex] = 9.95 mL
Percentage Error = [tex] \frac{measured volume - Actual volume}{actual volume} [/tex] x 100
= [tex] \frac{10 - 9.95}{9.95} [/tex] x 100 = 0.5 % error
The percent error for the 10 mL of water, given a measured mass of 9.925 g and a density of 0.9975 g/mL, is approximately 0.501%.
Explanation:To calculate the percent error for the 10 mL of water given the measured mass and the density of water, we can use the formula for percent error:
Percent Error = | (Experimental Value - Theoretical Value) / Theoretical Value | × 100%
The theoretical mass of 10 mL of water using the density 0.9975 g/mL is calculated as follows:
Theoretical Mass = Volume × Density = 10 mL × 0.9975 g/mL = 9.975 g
The experimental mass measured is 9.925 g. Now, applying the percent error formula:
Percent Error = | (9.925 g - 9.975 g) / 9.975 g | × 100% = |(-0.05 g) / 9.975 g| × 100% ≈ 0.501%
Therefore, the percent error for the measurement of 10 mL of water is approximately 0.501%.
How many electrons are needed in the outer energy levels of most atoms to be chemically stable?
Answers
How is the strength of a weak acid related to the strength of its conjugate base?
Answers
Final answer:
The strength of a weak acid is related to the strength of its conjugate base through an inverse relationship.
Explanation:
The strength of a weak acid is related to the strength of its conjugate base through an inverse relationship. According to the general rule, the stronger the acid, the weaker the conjugate base, and vice versa. This can be understood by considering the concept of acid-base equilibrium.
For example, if we have a strong acid and a weak base, the acid-base equilibrium will favor the side with the weaker acid and base. Conversely, if we have a weak acid and a strong base, the equilibrium will favor the side with the weaker acid and base.
Therefore, the strength of a weak acid and its conjugate base are inversely related, with the weaker acid having a stronger conjugate base.
The loss of static energy electric charges move off an object is called
Answers
The loss of static energy as electric charges move off an object is called electric discharge.
Electric discharge can be defined as release and transmission of electricity through a medium in an applied electric field.
It results from the conducting path between two points of different electrical potential in the medium where the points are immersed.
Describe the solid state according to the kinetic molecular theory
Answers
The kinetic molecular theory describes the solid state as composed of tightly packed particles that vibrate about fixed positions and are held together by strong intermolecular forces. This leads to solids having a defined shape and volume, and being less compressible compared to liquids and gases.
Solid State According to the Kinetic Molecular Theory
The kinetic molecular theory is a framework used to describe the behavior of matter in different states - solid, liquid, and gas. According to this theory, the solid state of matter is characterized by particles that are tightly packed together, often in a regular pattern. These particles have very little movement, primarily vibrating about fixed positions.
In the context of the kinetic molecular theory, intermolecular attractions are significant in the solid state, holding the particles closely to one another. This close packing and the limited movement of particles correspond to the low kinetic energy compared to gases. These properties explain why solids have a definite shape and volume, and why they are not easily compressible.
Focusing on the particles' behavior in solids, we understand that the restricted motion due to strong intermolecular forces results in the characteristic rigidity and structural stability of the solid state. Although the particles are in motion, it is minimal and does not allow for the particles to move past each other, unlike in liquids or gases.
If 36 grams of aluminum react with an excess of oxygen, as shown in the balanced chemical equation below, how many grams of aluminum oxide can be formed? (1 point)
4Al + 3O2yields 2Al2O3
68 grams
24 grams
272 grams
18 grams
Answers
molar mass of Al2O3 = 101.96
36 / 26.98 = 1.3343 moles Al
set up a proportion : 1.3343 / 4 = x / 2 (let x = moles of Al2O3)
x = 0.66716 moles of Al2O3
0.66716 * 101.96 = 69.024 g of Al2O3
Why does Tom Zambrano think that renewable energy science is a good choice for a career?
Answers
Answer:
There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.
Explanation:
Answer:Sample Response:
There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.
Explanation:
What did you include in your response? Check all that apply.
opportunities
exciting field
variety
room for new ideas
what do we need to survive and how long for
Answers
- Lots of water
- Lots of food
- Shelter
Hope this helped!
If an atom loses a neutron, what happens? (4.10)
Answers
Answer:
Its mass is lowered, but it is still the same element.
Explanation:
It right
a mixture of 10.0 g of Ne and 10.0 g AR have a total pressure of 1.6 atm. what is the partial pressure of Ne?
Actually I know the answer but I didn't know how they get 2/3
Answers
Atomic weight neon = 20.1797
Atomic weight argon = 39.948
Moles neon = 10.0 g / 20.1797 g/mol = 0.495547506 mol
Moles argon = 10.0 g / 39.948 g/mol = 0.250325423 mol
So there's a total of 0.495547506 + 0.250325423 = 0.745872929 moles of gas particles. And for neon, it contributes 0.495547506/0.745872929 = 0.664385965 = 66.4385965% of them, so it contributes 66.4385965% of the total pressure. Which is 66.4385965% * 1.6 atm = 1.063017544 atm.
Rounding to 3 significant figures gives 1.06 atm, or 66.4% of the total pressure.
The partial pressure of Ne is [tex]\boxed{1.063{\text{ atm}}}[/tex].
Further Explanation:
Dalton’s law:
This law states that partial pressure of any gas is calculated by the multiplication of mole fraction and the total pressure of gas mixture.
The expression for partial pressure of a particular gas is,
[tex]{P_{{\text{gas}}}} = {X_{{\text{gas}}}} \cdot {P_{{\text{total}}}}[/tex] …… (1)
Where,
[tex]{P_{\text{gas}[/tex] is the partial pressure of the gas.
[tex]{P_{{\text{total}}[/tex] is the total pressure of the mixture.
[tex]{X_{{\text{gas}}}[/tex] is the mole fraction of gas.
The formula to calculate moles of component is as follows:
[tex]{\text{Moles of component}} = \dfrac{{{\text{Mass of component}}}}{{{\text{Molar mass of component}}}}[/tex] …… (2)
Substitute 10.0 g for mass of component and 20.179 g/mol for molar mass of component in equation (2) to calculate moles of Ne.
[tex]\begin{aligned}{\text{Moles of Ne}} &= \frac{{{\text{10}}{\text{.0 g}}}}{{{\text{20}}{\text{.179 g/mol}}}} \\ &= 0.4956{\text{ mol}} \\\end{aligned}[/tex]
Substitute 10.0 g for mass of component and 39.948 g/mol for molar mass of component in equation (2) to calculate moles of Ar.
[tex]\begin{aligned}{\text{Moles of Ar}} &= \frac{{{\text{10}}{\text{.0 g}}}}{{{\text{39}}{\text{.948 g/mol}}}} \\&= 0.2503{\text{ mol}} \\ \end{aligned}[/tex]
Total number of moles can be calculated as follows:
[tex]\begin{aligned}{\text{Total number of moles}} &= \left( {0.4956 + 0.2503} \right){\text{ mol}} \\ &= 0.7459{\text{ mol}} \\\end{aligned}[/tex]
The formula to calculate mole fraction of Ne is as follows:
[tex]{\text{Mole fraction of Ne}} = \dfrac{{{\text{Moles of Ne}}}}{{{\text{Total number of moles}}}}[/tex] …… (3)
Substitute 0.4956 mol for moles of Ne and 0.7459 mol for total number of moles in equation (3).
[tex]\begin{aligned}{\text{Mole fraction of Ne}} &= \frac{{{\text{0}}{\text{.4956 mol}}}}{{{\text{0}}{\text{.7459 mol}}}} \\&= 0.6644 \\\end{aligned}[/tex]
Substitute 0.6644 for [tex]{X_{{\text{gas}}}}[/tex] and 1.6 atm for [tex]{P_{{\text{total}}}}[/tex] in equation (1) to calculate partial pressure of Ne.
[tex]\begin{aligned}{P_{{\text{Ne}}}} &= \left( {0.6644} \right)\left( {1.6{\text{ atm}}} \right) \\&= 1.063{\text{ atm}} \\\end{aligned}[/tex]
Learn more:
Calculate the moles of chlorine in 8 moles of carbon tetrachloride: https://brainly.com/question/3064603 ]Which law states the direct relationship between volume and absolute temperature at constant pressure? https://brainly.com/question/1403211
Answer details:
Grade: Middle School
Subject: Chemistry
Chapter: Gases and the kinetic-molecular theory
Keywords: partial pressure, mole fraction, Ne, Ar, moles, molar mass, mass, 1.063 atm, 1.6 atm, 0.6644, mole fraction of Ne.
Which is not a characteristic of chemical equilibrium?
The reactions go to completion.
The reactions are reversible.
The reaction occurs in a closed container.
The forward and reverse processes occur at the same rate.
Answers
C. The reactions go to completion
This reaction was monitored as a function of time:
AB --> A + B
A plot of 1/[AB] versus time yields a straight line with slope of -0.055/M*s.
a) What is the value of the rate constant (k) for this reaction t this temperature?
b) Write the rate law for the reaction.
c) What is the half-life when the initial concentration is 0.55M?
d) If the initial concentration of AB is 0.250M, and the reaction mixture initially contains no products, what are the concentrations of A and B after 75s?
Answers
a. The value of the rate constant (k) for this reaction at this temperature is 18.18 [tex]M^-1*s^-1.[/tex]
b. The rate law can be written as: ate = k[AB]
c. The half-life of the reaction when the initial concentration is 0.55 M is 0.038 seconds.
d. The concentrations of A and B after 75 seconds would be approximately 0.004 M each.
How to Write the rate law for the reaction.To answer the given questions, analyze the reaction kinetics based on the provided information:
a) The rate constant (k) can be determined from the slope of the plot 1/[AB] versus time. The slope is given as -0.055/M*s. The rate constant (k) can be calculated by taking the reciprocal of the slope:
k = -1/slope
k = -1/(-0.055/Ms)
k = 18.18 [tex]M^-1s^-1[/tex]
Therefore, the value of the rate constant (k) for this reaction at this temperature is 18.18 [tex]M^-1*s^-1[/tex].
b) The rate law can be determined using the given reaction:
AB --> A + B
Since the reaction is a first-order reaction, the rate law can be written as:
Rate = k[AB]
c) The half-life (t₁/₂) can be calculated using the first-order integrated rate law:
t₁/₂ = (0.693) / k
Given the initial concentration ([AB]₀) as 0.55 M and the rate constant (k) as 18.18 [tex]M^-1*s^-1[/tex], calculate the half-life:
t₁/₂ = (0.693) / (18.18 [tex]M^-1*s^-1[/tex])
t₁/₂ ≈ 0.038 s
Therefore, the half-life of the reaction when the initial concentration is 0.55 M is approximately 0.038 seconds.
d) To determine the concentrations of A and B after 75 seconds, use the first-order integrated rate law:
[AB] = [AB]₀ * exp(-kt)
Given:
[AB]₀ = 0.250 M (initial concentration of AB)
t = 75 s (time)
Using the rate constant (k) calculated earlier (18.18 [tex]M^-1*s^-1[/tex]), calculate the concentrations of A and B:
[AB] = 0.250 * exp(-18.18 [tex]M^-1*s^-1[/tex] * 75 s)
[AB] ≈ 0.004 M
Since the reaction is stoichiometrically 1:1, the concentrations of A and B after 75 seconds would be:
[A] ≈ 0.004 M
[B] ≈ 0.004 M
Therefore, the concentrations of A and B after 75 seconds would be approximately 0.004 M each.
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The rate constant is 0.055/M*s. The rate law is rate = k[AB]. The half-life is 10.5 seconds and the concentrations of A and B after 75 seconds can be calculated using the integrated rate equation.
Explanation:a) The slope of the line in the plot represents the rate constant (k) for this reaction. In this case, the slope is -0.055/M*s. So, the value of the rate constant is 0.055/M*s.
b) The rate law for the reaction can be determined by examining the stoichiometry of the reaction. The reaction is AB → A + B. Since the rate is expressed as 1/[AB], the rate law is rate = k[AB].
c) To find the half-life, we need to use the integrated rate equation ln([AB]₀/[AB]) = kt. Substituting the given values, we get ln(0.55/0.25) = (0.055/M*s)t. Solving for t, we find t = 10.5 seconds.
d) To find the concentrations of A and B after 75 seconds, we can use the integrated rate equation again. [A] = [AB]₀ - [AB]₀e^{-kt}. Plugging in the values, we get [A] = 0.250M - 0.250Me^{(-0.055/M*s)(75s)}. Similarly, we can find [B] = 0.250M - [A].
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