To balance a chemical equation, you can only adjust the coefficients; you cannot change the subscripts. The ratios of the atoms in the molecule and the resulting chemical characteristics are altered by changing subscripts.
What occurs if the subscript in a chemical equation is changed?Changing the coefficients solely affects the quantity of molecules in that specific chemical. However, modifying the subscripts will change the substance itself, rendering your chemical equation incorrect.
What distinguishes altering a subscript from altering a coefficient in a chemical formula?You can determine the substance from the subscript. You can find out how much of each element is present in the molecule. The substance itself would change if it were altered. In contrast, simply altering the coefficient results in a change in the number of molecules.
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How i an electron orbital different from an orbit what do the hape of the orbital hown in Figure 14
An orbit is a set route along which electrons spin around the nucleus of an atom, whereas an orbital is a region where the chance of finding any electron is calculated.
What is electron?The electron is a subatomic particle with an initial electric charge of -1. Electrons are the first generation of the lepton particle family and are often regarded as elementary particles due to the lack of known components or substructure. An electron is a negatively charged subatomic particle that can be attached to or released from an atom (not bound). A bound electron is one of the three major kinds of particles within an atom, the other two being protons and neutrons. The nucleus of an atom is made up of electrons, protons, and neutrons.
Here,
An orbit is a fixed path along which electrons spin around an atom's nucleus, whereas an orbital is an area where the probability of finding any electron is determined.
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A team of scientists claim that they have discovered a new experimental
method for determining atomic mass. Which of the following is necessary for
the claim to be considered valid?
A. The atomic mass of an element according to the new method
must be greater than its previous measurement.
B. The method must work for all isotopes.
C. The atomic mass of an element according to the new method
must be less than its previous measurement.
OD. Another team of scientists must be able to replicate the results of
the experiment.
SUBMIT
For a team of scientists to claim that they have discovered a new experimental method for determining atomic mass, their claim is to be considered valid only if another team of scientists is able to replicate the results of the experiment.
In order for a scientific claim to be considered valid, it is important that the results of the experiment can be replicated by other researchers.
Replication means that other scientists should be able to obtain the same results using the same methods. This helps to ensure that the results are accurate and reliable, rather than being a fluke or an error.
Without the ability to replicate the results, it is difficult to have confidence in the validity of the claim, as it may be due to uncontrolled variables or other factors that cannot be reproduced. Ensuring that results are replicable is an important part of the scientific process and helps to build a strong foundation of knowledge.
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Protactinium-234 has a half-life of 1 minute. How much of a 400. g sample protactinium would remain after 4 minutes
After 4 minutes, 200 g of protactinium-234 would remain.
What is protactinium-234?Protactinium-234 is a radioactive isotope of protactinium. It is a fission product that is produced when uranium atoms undergo fission. It has a half-life of 1.17 minutes and decays via beta-decay to uranium-234. It is the most stable isotope of protactinium and is found in very small quantities in uranium ore. The main uses for protactinium-234 are for research, nuclear medicine and nuclear power. In research, it can be used to study properties of fission products and to measure the efficiency of nuclear reactors. In nuclear medicine, it can be used to detect cancers and other conditions. Finally, it can be used in nuclear power plants to help regulate and control the flow of energy.
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if the density of hydrogen is 0.090 g l and its rate of diffusion is 5.93 times that of chlorine, what is the density of chlorine
The density of chlorine will be 3.163 g/L.
The mass of a substance per unit of volume is its density. According to Graham's law, a gas's rate of effusion is inversely proportional to its square root density. When a material's particles are concentrated in a low area, they tend to travel to the place where the concentration is highest. When we use perfume or a scented spray in one area of the room and subsequently can smell it throughout the entire space, that is a simple illustration of this process.
rate1 = H2 = 5.93
rate2 = Cl2 = 1
The molecular weight of H2 = 2.016
The molecular weight of Cl2 = x.
By Graham's Law:
5.93 / 1 = x / 2.016
35.1649 = x / 2.016
x = 70.89 g/mol
Determine gas density by volume
70.89 g / 22.414 L = 3.163 g/L
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world production of ammonia is now about 30 times greater than it was in 1950 suggest why the demand for ammonia is increased
There are a few reasons why the demand for ammonia has increased over time:
Population growth: The world's population has grown significantly over the past 70 years, and as the population has grown, so has the demand for food. Ammonia is a key ingredient in the production of fertilizers, which are used to help grow crops and increase food production. As the population has increased, so has the demand for fertilizers, which has contributed to the increase in the production of ammonia.Industrialization: As more countries have industrialized and developed, there has been an increased demand for ammonia to use as a feedstock in the production of chemicals, plastics, and other industrial products.Energy production: Ammonia can be used as a source of renewable energy, and there has been an increased demand for clean energy sources in recent years. This has led to an increase in the production of ammonia for use in energy production.Environmental concerns: Ammonia can be used to reduce greenhouse gas emissions, and there has been an increased focus on finding ways to reduce environmental impact. This has led to an increase in the production of ammonia for use in environmental applications.Hope This Helps You!
A binary covalent bond exists between
A. Any element
B. 2 nonmetals
C. 1met and 1 nonmetal
D. 2 metals
A binary covalent bond exists between 2 nonmetals.
These compounds are termed similarly to binary ionic compounds even though they don't contain ions.
These guidelines apply to the nomenclature of binary covalent compounds:
The complete name of the first element in the formula is given first.
The name of the second element refers to it as an anion.
Prefixes are employed to indicate the number of atoms in a compound. The prefix mono- is dropped if the first element only has one atom.
For instance, carbon monoxide is the name given to CO rather than monocarbon monoxide.
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Consider the following reaction: CS2(g) + 4H2(g) CH4(g) + 2H2S(g). The equilibrium constant K is about 0.31 at 900.°C. What is Kp at this temperature? A) 2.9 103 B) 3.2 10–3 C) 3.3 10–5 D) 3.0 101 E) 1.1 10–3
The Kp of the reaction as it has been shown is 2.9 × 10^3 Option A
What is the Kp?We know that the equilibrium constant is the constant that has to do with the ease with which the reactants that are in the system can be converted into the products. In this case we have been given the reaction equation as it has been shown in the question.
Let us all now bear in mind that the reaction ghat we have here is a gas phase reaction and since the reaction is a gas phase reaction the equilibrium constanta that has been given as K can also be written in terms of the partial pressures of the gasses that are present in the system and this ius the bed rock of the answer that we woulod give above. The Kp can now be written as a scientific notation as shown above.
Then;
kp = Kc/(RT)^∆n
Kp = equilibrium constant using pressure
Kc = equilibrium constant using concentration
R = gas constant
T = temperature
n= difference in number of moles
Kp = 0.31/(0.082 × 1173)^-2
Kp = 2.9 × 10^3
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Explain if the process of turning pennies into brass would work on other coins - like a quarter, nickel, or dime.
The process of turning pennies into brass simply has to do with dissolving the copper in the penny by a chemical process and this is then replaced with a brass alloy and this process could theoretically be applied to other coins.
What is a coin?A coin is a tiny, flat, round piece of metal or plastic which is used as legal tender or a medium of exchange. It should be noted that they are mass-produced at a mint so as to facilitate trade, and their weight is standardized.
In order achieve various mechanical, electrical, and chemical properties, it should be noted that copper and zinc can be combined in different ratios in order to create the alloy known as brass.
The composition of other coins, such as quarters, nickels, and dimes, is different from pennies and would require different chemical processes to alter. Additionally, it is illegal to deface or alter U.S. coin currency, so it would not be legal to do this process on any other coin. In this case, it can be applied to other coins.
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The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4. 1 (at 0 °c) if the reaction is carried out in a 22. 4 l container, which initial amounts of x and y will result in the formation of solid xy?
The initial amounts of x and y required to form solid xy are 1 mol of x and 1 mol of y.
What is initial amount?The initial amount is the starting point for any financial transaction.
In order to calculate the initial amounts of x and y that will result in the formation of solid xy, the following equation must be used:
nx = ny * (4.1/kp)
where nx and ny are the moles of x and y, respectively, and kp is the equilibrium constant of the reaction.
Given the information provided, we can calculate the moles of x and y:
nx = ny * (4.1/4.1) = ny
ny = (22.4 L * 1 mol/22.4 L) = 1 mol
Therefore, nx = 1 mol and ny = 1 mol.
This means that if the reaction is carried out in a 22.4 L container, the initial amounts of x and y required to form solid xy are 1 mol of x and 1 mol of y.
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What is the group number of the element in the periodic table?
a
1
b
2
c
13
d
15
The group number of the element in the periodic table is equal to 15 as it has five valence electrons. Therefore, .option D is correct.
What is a valence electron?Valence electrons can be explained as the electrons occupying the outer shell of an atom while the electrons placed in the inner shell are known as core electrons. Lewis structures of the elements can be helpful to calculate valence electrons and know the types of bonds.
Valence electrons can be filled in different shells, causing interaction between atoms and leading to the formation of chemical bonds.
The five elements have five electrons in their valence shell therefore it belongs to nitrogen family. The group number can be calculated as 10 + 5 = 15
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How do you stop a chemical burn from burning?
Remove dry chemicals.Remove contaminated clothing or jewelry. Bandage the burn. Rinse again if needed.
the amount of harm to the skin relies upon on how strong the chemical was, how lots of it become at the skin, and how long it become there. Chemical burns, even minor ones, can be very painful. A minor burn may heal inside a few days. however a extra extreme burn might also take weeks or maybe months to heal completely.you need to now not use ice, or even ice-bloodless water, on a burn. extreme cold carried out to a burn can further damage the tissue. to properly cool and clean a burn, remove any apparel that covers it.
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Which one of the following combinations of names and formulas of ions is incorrect? a. CIO 3 chlorate b. HCO 3 hydrogen carbonate c. NO 2 nitrate
Nitrate NO 2 It is inappropriate to use one of the following ions' names and formulas.
Chlorate's purpose is unknown.Herbicides, explosives, defoliants, paper, leather, dyes, matches, and inks are all made from it. It's also used to make cosmetics and medications. An inorganic salt of sodium with the counter-ion chlorate is known as sodium chlorate. It serves as both a herbicide and an oxidizing agent for bleaching paper.
Where can you find chlorate?Chlorate, an anion, can enter drinking water through a number of different causes, such as the use of hypochlorite or chlorine dioxide as disinfectants, the oxidation of hypochlorite or chlorite by ozone, and pesticide runoff or paper mill discharges that contaminate the source water.
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Almost all of the oxygen (O2) one consumes in breathing is converted to:
a. acetyl-CoA.
b. carbon dioxide (CO2).
c. carbon monoxide and then to carbon dioxide.
d. none of the above.
e. water.
Almost all of the oxygen (O2) one consumes in breathing is converted to: b. carbon dioxide (CO2).
When we breathe in oxygen, it is used in cellular respiration, which is the process by which our body converts glucose and oxygen into energy in the form of ATP. In the process, the oxygen is combined with the hydrogen atoms from glucose to form water, and the carbon atoms from glucose are converted to carbon dioxide (CO2) as a waste product. Therefore, almost all of the oxygen that one consumes in breathing is converted to carbon dioxide (CO2).Breathing is the process by which an organism takes in oxygen and expels carbon dioxide. In humans and other mammals, this process is accomplished through the respiratory system, which includes the nose, trachea, bronchi, and lungs. When we inhale, air is drawn into the lungs through the nose or mouth, passing through the trachea and bronchi before reaching the alveoli, which are small air sacs in the lungs where gas exchange occurs.
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Balance the entire chemical reaction using an atom inventory. What is the coefficient for ammonia,
NH3? [?]NH3 + [ ]02 →→ []NO + H₂O
The coefficient of ammonia in the above chemical equation is 3.
What is a balanced equation?A chemical equation is said to be balanced when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.
Balancing chemical equations involves the addition of stoichiometric coefficients to the reactants and products.
According to this question, ammonia reacts with oxygen gas to produce nitrogen oxide and water as follows:
4NH₃ + 50₂ → 4NO + 6H₂O
Based on the above balanced equation, it can be said that the coefficient of ammonia is 4.
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Determine 4.86×10^24 atoms Au to grams
The mass of 4.86 × 10²⁴ Au atoms is equal to 1589.6 g.
What is Avogadro's number?Avogadro’s number can be used to express the number of entities such as molecules, atoms, ions, electrons, or protons in one mole of any substance.
The value of Avogadro’s constant is equal to 6.022 × 10²³ per mole.
Given, the number of atoms of the Au = 4.86 × 10²⁴
The atomic mass of the Au = 197 g/mol
So 6.022 × 10²³ atoms of Au have mass = 197 g
Then 4.86 × 10²⁴ Au atoms will have mass = 1589.6 g
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QUESTION 2 What is the uncertainty (in % RSD) of a standard solution prepared by pipetting 20mL of a 0.2487 M (s
The formula for standard deviation is: = (V1/C1) + (V2/C2) +... + (Vn/Cn).
How could we ascertain if the standard solution created using a pipette is correct?Calculating the percent relative standard deviation (RSD) of the measurement will allow us to ascertain the degree of uncertainty in a standard solution created by pipetting 20 mL of a 0.2487 M (stock) solution.
The RSD is determined by multiplying the standard deviation by the mean and then by 100. The formula to determine the standard deviation is: = (V1/C1) + (V2/C2) +... + (Vn/Cn).
Where n is the number of measurements, C is the stock solution's concentration, and V is the volume of solution added.
We are unable to compute the RSD for the given information since you have not provided any information regarding the number of measurements taken.
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Calculate the number of molecules in 9.03 liters of carbon dioxide gas at standard temperature and pressure.
9.03 liters of carbon dioxide gas would contain 0.40 moles of carbon dioxide molecules. Since 1 mole of any gas contains 6.02 x 10^23 molecules, the number of molecules of carbon dioxide gas in 9.03 liters of carbon dioxide gas at STP would be 2.41 x 10^23 molecules.
What is molecules?Molecules are the smallest units of matter that can exist by themselves. They are composed of two or more atoms that are held together by chemical bonds. Molecules can be found in the air we breathe, the water we drink, and the food we eat. They can also be found in living organisms, like plants and animals. Molecules can be made of a variety of different atoms, such as oxygen, carbon, nitrogen, and hydrogen.
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0.25 moles of a gas at 760 mmHg and 298 K are contained in a 6.1 L bottle. What is the pressure of the system if the amount of gas in the bottle is reduced to 0.13 mole and the temperature is reduced to 100 K?
The pressure in the container can be calculated using Ideal gas law. The pressure of the gas at the reduced temperature will be 0.17 atm.
What is ideal gas law?Ideal gas law states the relation between volume, pressure, temperature and number of moles of a gas as written below:
PV = nRT.
Where R is the universal gas constant equal to 0.082 L atm/ K mol.
Given , T = 100 K
n = 0.13 moles
V = 6.1 L
Then, P = nRT/ V
The pressure of the gas at 100 K with 0.13 mole is calculated as follows:
P = (0.13 mole × 100 K × 0.082 L atm/ K mol) / 6.1 L = 0.17 atm.
Therefore, the pressure of the gas is 0.17 atm.
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Acellus
A steel pipe measures
62. 95 feet. How many
kilometers is this?
? ] km
Be sure to round your answer to the
correct number of significant figures.
Length in km
Enter
The answer is 0.01918 kilometers.
To convert from feet to kilometers,
you must first convert feet to meters. To do this, multiply the number of feet by 0.3048. In this case, 62.95 feet multiplied by 0.3048 equals 19.18 meters To convert from meters to kilometers, multiply the number of meters by 0.001. 19.18 meters multiplied by 0.001 equals 0.01918 kilometers. Therefore, 62.95 feet is equal to 0.01912 kilometers.
To review the conversion steps more closely, starting with feet and ending with kilometers:
1. Feet (62.95) to meters (19.18): Multiply by 0.3048
2. Meters (19.18) to kilometers (0.01918): Multiply by 0.001 or divide by 1000.
Therefore, 62.95 feet is equal to 0.01918 kilometers.
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How does the volume change if 50mL of a gas material is cooled from 30\deg C to 5\deg C ?
50mL
46mL
100mL
56mL
The final volume can be determined using Charles's law. The volume of gas at 5 degree Celsius will be 8.3 ml.
What is Charles's law of gases ?According to Charles's law, at constant pressure, the volume of a gas is directly proportional to the temperature.
Hence, V/T = constant.
Let, V1 and T1 be the initial volume and temperature and V2, T2 be the final quantities.
then, V1/T1 = V2/T2.
V2 = V1 T2/ T1
Given, V1 = 50 ml
T1 = 30 °C
T2 = 5 °C
Then, V2 = 50 ml × 5 °C /30 °C = 8.3 ml
Therefore, the volume of the gas reduces to 8.3 ml.
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Write a balanced net ionic equation for a redox reaction that results in the formation of potassium chloride. (Assume that potassium chloride is not a starting material, and assume the reaction takes place in aqueous solution.)
2K + [tex]Cl_{2}[/tex] = 2KCl is the balanced net ionic equation for a redox reaction that results in the formation of potassium chloride.
Chlorine gas, Cl 2, will cause potassium metal, K, to burn, forming potassium chloride, KCl, an ionic molecule. This synthesis reaction is described by the following balanced chemical equation.
2K + [tex]Cl_{2}[/tex] = 2KCl
Consider this reaction to be a redox reaction as an alternative mental image. Here, chlorine gas is oxidizing potassium metal to produce potassium cations. Chlorine gas is converted into chloride anions during the process. The subsequent reaction between the potassium actions and the chloride anions will result in potassium chloride.
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What are the 7 are elements?
The classical elements or seven elements in nature are plants, warm energy, soil, mineral, water, cold energy, and air.
Living organisms incorporate distinctly massive quantities of oxygen, carbon, hydrogen, nitrogen, and sulfur (those 5 factors are called the majority factors), together with sodium, magnesium, potassium, calcium, chlorine, and phosphorus (those six factors are called microminerals). From the smallest atom to a massive whale to the sun machine itself, all matters are stated to be composed of a few aggregate of those elements. Halogens belong to group 17, and they acquire only one electron in order to attain stable electronic configuration.
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A certain solution contains 4.34.34, point, 3 grams of salt per liter. How much salt is there in 111111 liters of the solution
A certain solution contains 4.3 grams of salt per liter. the salt is there in 11 liters of the solution is 47.3 grams.
The solution contains = 4.3 grams salt per liters
in one liters the solution contains = 4.3 grams of the salt.
the salt in the 11 liters = ?
so, in one liter in contains = 4.3 grams
in 11 liters it will contains = 4.3 × 11
= 47.3 g
the round off answer to the solution is 47.3 g.
Thus the amount of the salt in the 11 Liters of the solution is the 47.3 g.
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A sample of fluorine gas at STP contains 4.088x10^24 atoms. What is the volume in liters of the sample?
Record your answer to 1 decimal place. Do not put units on your answer.
According to the concept of Avogadro's number and STP conditions volume in liters of the sample is 15,388.7.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Number of moles is obtained as, number of atoms/Avogadro's number=4.088×10²⁴/6.023×10²³=6.78 moles on substitution in formula of PV=nRT=V=6.78×8.314×273/1=15,388.7 liters.
Thus, the volume is 15,388.7 liters of the sample.
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3. A student placed artificial cells, each containing a 25% sugar solution, into three different beakers containing sugar solution which varied in concentration from 0% to 25%. The setups are shown below. The student collected data on the mass of each artificial cell. The student predicted that the cell in the beaker with 25% sugar solution would have the greatest change in mass after 24 hours. Would his prediction be correct? Support your answer.
The student collected data on the mass of each artificial cell. The student predicted that the cell in the beaker with 25% sugar solution would have the greatest change in mass after 24 hours. The student's prediction would be correct.
Why would the prediction of the experiment be correct?The artificial cell placed in the beaker with 25% sugar solution would likely have the greatest change in mass after 24 hours because of osmosis.
Osmosis is the movement of water across a semi-permeable membrane from an area of high water concentration to an area of low water concentration. In this case, the artificial cell has a semi-permeable membrane that allows water to pass through, but not sugar.
The 25% sugar solution in the beaker is less concentrated than the sugar solution inside the artificial cell, so water will move from the beaker into the cell, causing the cell to swell and increase in mass.
On the other hand, the artificial cells in the beakers with 0% and 12.5% sugar solutions will have less of a change in mass as the solution outside of the cell is more concentrated than inside the cell.
Therefore, the correct answer is as given above
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PLS HELP ME WITH QUESTION 5 I NEED HELP ASAP
Answer:
30.5%
Explanation:
The equation shows the reaction between magnesium and sulfuric acid
Mg + HSO. → MgSO. + H
(Mg=24, H=1, S=32 0=16)
5
In this maction, what mass of magnesium sulfate will be formed when 6g of magnesium reacts
with excess sulfuric acid?
Answer:
Mg + Hso4 - Mgso4 + H
24g of magnesium- 120g of Mgso4
Xg. - 6g of Mgso4
Cross multiply
120x - 144
x = 144/120
x= 1.2g
The temperature inside a pressure cooker is 117°C. Calculate the vapor pressure of water inside the pressure cooker. What would be the temperature inside the pressure cooker if the vapor pressure of water was 2.85 atm?
The vapor pressure of water at its boiling point 100°C is 1 atm. Then the pressure at 117°C is 1.17 atm and the temperature of water at a pressure of 2.85 atm is 285°C.
What is boiling point ?Boiling point of a substance is the temperature at which it converts from liquid state to vapor state. At this temperature the vapor pressure of water vapor is equal to the atmospheric pressure that is 1 atm .
The temperature-pressure relation is written as:
P1 /T1 = P2/ T2
Now, the pressure inside the cooker at a temperature of 117°C is calculated as:
(1 atm × 117 °C) / 100 °C = 1.17 atm.
Thus, pressure at 117 °C is 1.17 atm. Then, If the pressure is 2.85 atm, then the temperature of water inside the pressure cooker is calculated as:
(2.85 atm × 117 °C) / 1.17 = 285 °C
Therefore, the temperature at 2.85 atm is 285 °C.
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A sample of gas has a pressure of 3.4 atm at 300 K in a container with a fixed volume. What will be the pressure (in atm) of this same sample of gas if the temperature is changed to 402 K
If the temperature is raised to 402 K, the pressure (in atm) of this given sample of gas will be 4.5.
Given,
Pressure P1 = 3.4 atm
Temperature T1 = 300 K
⇒ T2 = 402 K
⇒ P2 = ?
⇒ P1/T1 = P2/T2
⇒ 3.4/300 = P2/402
⇒ P2 = 4.5
⇒ Pressure = 4.5 atm
An atmosphere (atm) is a measuring unit that corresponds to the average air sea level pressure at 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere consists of 1,013 millibars of pressure, or 760 millimetres (29.92 inches) of mercury.
Pressure is defined as the force exerted by one material on another per unit area. The force also that gas exerts on the container limits is defined as gas pressure. Gas molecules travel at random over the specified volume. They clash with the surface as well as each other during this movement.
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1. What is 16.2 kPa in atmospheres?
According to the question,16.2 kPa is equal to 0.16 atmospheres.
What is the atmospheres?
The atmosphere is the thin layer of gases and particles that surrounds Earth, protecting us from the sun’s harmful radiation and maintaining the planet’s temperature. It is composed of 78% nitrogen, 21% oxygen, 0.9% argon, 0.03% carbon dioxide, and trace amounts of other gases, as well as water vapour, dust, and other particles. The atmosphere works by trapping heat from the sun, allowing temperatures to remain relatively stable throughout the world. It also helps regulate the water cycle, ensuring that water remains available for life on Earth. The atmosphere also helps protect us from environmental hazards like ozone depletion and acid rain. In addition, it is home to many species of birds, insects, and other animals. Without the atmosphere, Earth would be a barren, lifeless planet.
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