The absolute magnitude of the rate of change for [NH₃] in the reaction 2 NH₃(g) → N₂(g) + 3 H₂(g) when the rate of change for [H₂] is 4.10 M/s is 2.73 M/s.
The absolute magnitude of the rate of change for [NH₃] when the rate of change for [H₂] is 4.10 M/s in the reaction 2 NH₃(g) → N₂(g) + 3 H₂(g) can be calculated using the following steps:
Step 1: Write down the balanced chemical equation:
2 NH₃(g) → N₂(g) + 3 H₂(g)
Step 2: Determine the stoichiometric relationship between NH₃ and H₂:
From the balanced equation, we can see that 2 moles of NH₃ are involved in producing 3 moles of H₂. This means the stoichiometric ratio between NH₃ and H₂ is 2:3.
Step 3: Calculate the rate of change for [NH₃]:
We are given the rate of change for [H₂] which is 4.10 M/s. Using the stoichiometric relationship (2:3) between NH₃ and H₂, we can determine the rate of change for [NH₃]:
Rate of change for [NH₃] = (Rate of change for [H₂]) * (Stoichiometric ratio between NH₃ and H₂)
Rate of change for [NH₃] = (4.10 M/s) * (2 moles NH₃ / 3 moles H₂)
Rate of change for [NH₃] = 2.73 M/s
Step 4: Calculate the absolute magnitude of the rate of change for [NH₃]:
Since the reaction involves the decomposition of NH₃, the rate of change for [NH₃] will be negative. However, we want the absolute magnitude of the rate of change, so we need to disregard the negative sign:
Absolute magnitude of the rate of change for [NH₃] = |-2.73 M/s| = 2.73 M/s
Thus, the absolute magnitude of the rate of change for [NH₃] in the reaction 2 NH₃(g) → N₂(g) + 3 H₂(g) when the rate of change for [H₂] is 4.10 M/s is 2.73 M/s.
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determine the specific heat capacity in j/g°c of an alloy that requires 49.1 kj to raise the temperature of 180.7 g alloy from 217 k to 489 k.
The specific heat capacity of the alloy that requires 49.1 kj to raise the temperature of 180.7 g alloy from 217 k to 489 k is approximately 0.815 J/g°C.
Using the formula below, we can calculate the alloy's specific heat capacity (c) in joules per gram per degree Celsius (J/g°C):
q = mcΔT
Where q is the heat energy, m is the mass of the alloy, c is the specific heat capacity of the alloy, and T is the temperature change in degrees Celsius.
provided values
Given that 1 kJ = 1,000 J, q = 49.1 kJ = 49,100 J.
m = 180.7 g
ΔT = 489 K - 217 K = 272 K
We can find c by rearranging the formula:
c = q / (m * ΔT)
replacing the specified values:
c = 49,100 J / (180.7 g * 272 K)
c ≈ 0.815 J/g°C
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How many joules are required to heat 15 grams of ice from -200⁰ to 1400⁰ C?
Answer: A heat energy of 50160 joules are required to heat 15 grams of ice from \(-200^{o}C\) to \(1400^{o}C\).
Explanation:
Given : mass of ice = 15 g
Convert grams into kg as follows,
\(1 g = 0.001 kg\\15 g = 15 g \times \frac{0.001 kg}{1 g}\\= 0.015 kg\)
Initial temperature = \(-200^{o}C\)
Final temperature = \(1400^{o}C\)
Formula used to calculate the amount of heat energy is as follows.
\(q = m \times C \times (T_{2} - T_{1})\)
where,
q = heat energy
m = mass of substance
C = specific heat of substance (ice here has C = \(2090 J/kg ^{o}C\))
\(T_{1}\) = initial temperature
\(T_{2}\) = final temperature
Substitute the values into above formula as follows.
\(q = m \times C \times (T_{2} - T_{1})\\= 0.015 kg \times 2090 J/kg^{o}C \times [1400 - (-200)]^{o}C\\= 50160 J\)
Thus, we can conclude that 50160 joules are required to heat 15 grams of ice from \(-200^{o}C\) to \(1400^{o}C\).
A balloon contains 14.0 L of air at a pressure of 760 torr. What will the volume of the air be when the balloon is taken to a depth of 10ft in a swimming pool, where the pressure is 981 torr? The temperature of the air in the balloon doesn't change. a) 8.8 L
b) 17.7 L
c) 15.4 L
d) 10.8 L
the final volume of air in the balloon when the balloon is taken to a depth of 10ft in a swimming pool, where the pressure is 981 torr is 10.8 L. Answer: d) 10.8 L.
We are given the initial volume of air in the balloon, Vi = 14.0 L. The initial pressure, Pi = 760 torr. The final pressure, Pf = 981 torr. The depth of the swimming pool, h = 10 ft. The temperature of the air, T is constant, which means that the gas in the balloon is an ideal gas.
We can use Boyle's law and the pressure difference to find the final volume of air.Boyle's law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure. That is,V_1/P_1 = V_2/P_2where V1 and P1 are the initial volume and pressure, and V2 and P2 are the final volume and pressure.
Rearranging this equation, we getV_2 = V_1 × P_1/P_2= 14.0 L × (760 torr)/(981 torr)= 10.8 L
Therefore, the final volume of air in the balloon is 10.8 L. Answer: d) 10.8 L.
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Solve the problem in the image.
KOH - One oxygen atom
(NH4)2SO4 - Two nitrogen atoms
What is a chemical formula?A chemical formula is a representation of the chemical composition of a substance using symbols and subscripts to indicate the number of atoms of each element in a molecule or formula unit.
In other words, it is a shorthand way of describing a chemical compound using the symbols of the elements present in the compound and the number of atoms of each element in the compound.
The chemical formula can show the way that the atoms in the compounds are arranged.
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plz, help me Lisa’s doctor tells her that she needs to eat more foods that contain calcium to maintain her bone health. What could happen if Lisa doesn’t follow her doctor’s orders?
Answer:
Deficiency of calcium which means that her body will take calcium from her bones which results in weakening of bones. (osteoporosis)
Explanation:
pure toluene (c7h8) has a normal boiling point of 110.60oc. a solution of 7.80 g of anthracene (c14h10), in 100.0 g.toluene has a boiling point of 112.06oc. a. what is the molality of the solution? b. what is the molal boiling point elevation constant for toluene?
Pure toluene (c7h8) has a normal boiling point of 110.60oc. A solution of 7.80 g of anthracene (c14h10), in 100.0 g. toluene has a boiling point of 112.06oc. The molality of the solution is 0.438 mol/kg. and the molal boiling point elevation constant for Toluene is 3.33 °C/m.
Given that,
Molecular weight of Toluene, C7H8 = 92 g/mol
Molecular weight of Anthracene, C14H10 = 178 g/mol
Boiling point of pure Toluene, Tb° = 110.6°C
Boiling point of Toluene solution containing Anthracene, Tb = 112.06°C
We need to find the molality of the solution and the molal boiling point elevation constant for Toluene.
Molality of the solution:
Molality is defined as the number of moles of solute per kilogram of solvent.
(Here, the solvent is Toluene and the solute is Anthracene.) Number of moles of Anthracene,
n2 = Weight of Anthracene / Molecular weight of Anthracene = 7.80 g / 178 g/mol = 0.0438 moles
Number of kilograms of solvent,
w1 = Weight of Toluene / 1000 = 100.0 g / 1000 = 0.1 kg
Molality of solution, m = n2 / w1 = 0.0438 / 0.1 = 0.438 mol/kg
Therefore, the molality of the solution is 0.438 mol/kg.
Molal boiling point elevation constant for Toluene:
The elevation in the boiling point of the solvent is given by the formula:
ΔTb = Kb . m . i
where Kb is the molal boiling point elevation constant. m is the molality of the solution. i is the van't Hoff factor (which is equal to 1 for non-electrolytes like Anthracene)
ΔTb = Tb - Tb°= 112.06°C - 110.6°C = 1.46°C
We know that m = 0.438 mol/kg
Hence,1.46 = Kb . 0.438 . 1Kb = 3.33 °C/m
Therefore, the molal boiling point elevation constant for Toluene is 3.33 °C/m.
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Someone help me with this pls
How does the amount of salt affect the density of the water?
Answer:
the water sample with higher salinity will have greater mass, and it will therefore be more dense.
Explanation:
PLEASE MARK BRAINLY TY
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For a particular experiment, Nadia must measure the following quantities:
The mass and volume of a liquid sample
The temperature of the liquid every 0.5 seconds for 3 minutes
Select the tools that Nadia most likely needs to use.
stopwatch
electronic balance
graduated cylinder
ruler
thermometer
Answer:
Graduated cylinder
Stopwatch
Thermometer
Electronic Balance
Explanation:
The answers on Edge are above. (VERIFIED Edge Answer)
Make sure to click "thanks" and rate this answer to let others know this is the correct answer for this question.
Edge Tip: Answers do not mix or change.
A simple test is what researchers often use to determine if changes in one variable may lead to changes in another variable — in other words, establish cause and effect.
How do you define Experiment?Check Basic
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Aluminum foil, cast iron pans, copper pipes, graphite, and sea water can be classified as
A) insulators because free electron flow is hindered by the structure of the material.
Eliminate
B) conductors because electrons can move freely from one atom to another creating a current.
C) superconductors because they provide no resistance to electron flow through the material.
D) semiconductors because electron movement is dependent on the conditions - such as temperature and voltage.
answer
C) is the answer ⟵(๑¯◡¯๑)
4. What part of the Amino Acid structure is affected by heat? (1 point)
Heat primarily affects the non-covalent interactions that stabilize the secondary, tertiary, and quaternary structures of proteins, leading to denaturation and loss of their functional conformation.
Heat can affect various aspects of the amino acid structure, including conformational changes and chemical modifications. The specific region affected by heat depends on the temperature and duration of exposure. Here, we will primarily focus on the heat-induced denaturation of proteins, which are composed of amino acids
Protein denaturation occurs when the heat disrupts the weak non-covalent interactions that stabilize the folded structure of the protein. These interactions include hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic interactions. As the temperature rises, the increased kinetic energy causes these interactions to weaken and eventually break, leading to the unfolding of the protein.
The primary structure of an amino acid, which consists of a central carbon atom (the alpha carbon) bonded to an amino group, a carboxyl group, a hydrogen atom, and a side chain (R-group), is generally not directly affected by heat. The covalent bonds within the amino acid molecule, including the peptide bonds between adjacent amino acids in a protein chain, are relatively stable and require higher temperatures or other harsh conditions to break.
However, the disruption of non-covalent interactions by heat can lead to changes in the secondary, tertiary, and quaternary structures of proteins. The secondary structure, such as alpha helices and beta sheets, are formed by hydrogen bonding between the backbone atoms of the amino acids. Heat can cause these hydrogen bonds to break, leading to the unfolding of the secondary structure.
Additionally, the tertiary structure, which involves the overall three-dimensional folding of a protein, can be affected by heat. The hydrophobic interactions and other non-covalent bonds responsible for stabilizing the folded conformation can be disrupted, resulting in the protein unfolding into a more extended and disordered state.
In summary, heat primarily affects the non-covalent interactions that stabilize the secondary, tertiary, and quaternary structures of proteins, leading to denaturation and loss of their functional conformation. The primary structure of amino acids, which is determined by the covalent bonds, is generally more resistant to the effects of heat.
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Magnesium fluoride can be formed by burning magnesium in fluorine gas. With reference to its bonding, explain why magnesium fluoride has a very high melting point.
Answer:
Magnesium Flouride is a ionic compound and thus has a giant lattice structure. Its ions are held together in this lattice by strong electrostatic forces of attraction. A large amount of energy is needed to overcome the strong electrostatic forces of attraction between the Mg2+ ions and the F- ions to separate the ions. Hence Magnesium fluoride has a very high melting point.
Jacqueline is interested in helping her overweight cat lose weight so that he will be healthier and more active. She selects a new cat food based on the label’s claim that it can help with weight loss. Jacqueline measures out the food carefully each day, has been weighing the cat every 48 hours, and records the measurement. What keeps this practice from being a scientific experiment? A. There is only one cat and one type of food being used. B. The cat should be weighed every day to collect more data. C. She has not considered whether the cat will like the new food. D. The food is not the brand that Jacqueline’s friend used for his overweight
Answer:
sorry bro / sis this is too long question soo try by yourself
explain why is energy input required to add an electron to zinc
Answer: When you add an electron to zinc, it needs some extra energy. This is because zinc atoms naturally don't like having an extra electron. The extra electron and the electrons already present in zinc repel each other due to their negative charges. So, you have to give some energy to the zinc atom to overcome this repulsion and make it accept the additional electron. Basically, energy input is required to make zinc accept an extra electron because the electron doesn't fit easily and needs some force to be added.
Explanation: hope this helps
The sun consists of _____________ % of the mass in our solar system.
Answer:
Explanation:
Magma pushes up from the mantle in the middle of the Atlantic Ocean. As a result, the Atlantic Ocean is growing by several centimeters each year. How else has this magma affected the Atlantic Ocean?
A.
It has produced volcanoes in the middle of the lithospheric plates.
B.
It has produced a flat, smooth ocean floor as the continents separate.
C.
It has created a long, large mountain range below the ocean's surface.
D.
It has made the Atlantic waters much warmer than the Pacific Ocean.
Answer:
i dunno
Explanation:
me not smart
Answer:
A
Explanation:
makes the most sence srry if wront
2500 liters of oxygen gas is produced at 1.00 atm of pressure. It is to be compressed and stored in a 20.0 liter cylinder. If temperature is constant, calculate the pressure of the oxygen in the cylinder. O 125 atm O 80.0 atm O 8.00 am O 4.00 atm
The pressure of the oxygen in the cylinder can be calculated using the ideal gas law PV = nRT. Therefore, the pressure of the oxygen in the cylinder will be 125 atm.
As we know that,
PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature (assumed constant). We can also use the proportionality relationship between the initial and final pressures and volumes, P1V1 = P2V2.
Given:
V1 = 2500 L
P1 = 1.00 atm
V2 = 20.0 L
We can rearrange the proportionality equation to find P2:
P2 = P1 * V1/V2
So P2 = 1.00 atm * 2500 L / 20.0 L = 125 atm
Therefore, the pressure of the oxygen in the cylinder will be 125 atm.
It is important to note that compressing a gas to such high pressures is not safe and could cause the cylinder to explode. In practice, this process will be done in steps and in controlled conditions.
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What is the molality of a solution containing 4. 0 grams
of NaCl dissolved in 3000 grams of water?
The molality of the solution containing 4. 0 grams of NaCl dissolved in 3000 grams of water is approximately 0.0228 mol/kg.
To calculate the molality of a solution, you can use the formula:
molality = moles of solute / mass of solvent (in kilograms).
In this case, the solute is NaCl, and the solvent is water.
The number of moles of NaCl needs to be calculated:
The atomic mass of Na (sodium) is 22.99 g/mol, and Cl (chlorine) has an atomic mass of 35.45 g/mol. Therefore, the molar mass of NaCl can be determined by adding these two values together: (22.99 + 35.45) g/mol = 58.44 g/mol. The moles of NaCl can be found by dividing the mass by the molar mass: 4.0 g / 58.44 g/mol ≈ 0.0685 moles.
Next, convert the mass of water to kilograms:
- 3000 g = 3.0 kg.
Finally, calculate the molality using the formula:
- molality = 0.0685 moles / 3.0 kg ≈ 0.0228 mol/kg.
Therefore, the molality of the solution is approximately 0.0228 mol/kg.
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if 7.35 l of nitrogen gas and 26.04 l of hydrogen gas were allowed to react, how many liters of ammonia gas could form? assume all gases are at the same temperature and pressure.
When 7.35 l of nitrogen gas and 26.04 l of hydrogen gas were allowed to react, then the amount of gas that are formed is 14.7 L.
The balanced chemical reaction is given as,
N₂ + 3H₂ → 2 NH₃
Using the coefficients of the balanced chemical equation, we convert both initial volumes of gases to liters of ammonia as shown. The least amount produced will come from the limiting reagent and is the theoretical yield for the reaction.
7.35 L N₂ × 2 L N₂/1 L N₂ = 14.7 L NH₃
26.04 L N₂ × 2 L N₂/3 L N₂ = 17.36 L NH₃
Therefore, the theoretical yield of NH₃ is 14.7 L.
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The following is information from a simple linear regression to estimate the energy content (calories) of a muesli bar, based on the protein content (grams) = 73.4+0.38 Sugar r = 0.7 n = 77 What is the value of the coefficient of determination? Please give your answer correctly rounded to two decimal places and do NOT create a percentage.
The value of the coefficient of determination is 0.49.
The coefficient of determination, also known as R-squared (R²), measures the proportion of the total variation in the dependent variable (energy content) that can be explained by the independent variable (protein content). It provides a measure of how well the regression model fits the data.
The coefficient of determination is calculated by squaring the correlation coefficient (r), which represents the strength and direction of the linear relationship between the two variables.
In this case, the given information provides the correlation coefficient (r = 0.7), which indicates a moderate positive correlation between protein content and energy content.
To find the coefficient of determination, we square the correlation coefficient:
R² = r² = (0.7)² = 0.49
Therefore, the value of the coefficient of determination is 0.49.
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A bullet train traveled a distance of 246 miles in 2 hours. What was its average speed
If a bullet train travelled a distance of 246 miles in 2 hours, then the average speed of train is 122.45 miles/h.
What is speed?The amount of ground an object covers in a given amount of time is known as its speed in physics. Alternatively put, speed refers to the rate of movement of an object. The length of the unit time can be in seconds, hours, days, or years. It informs us of an object's motion's speed or slowness. Quantity is a scalar, and speed is it. The SI unit of speed is the m/s.
The majority of things and bodies don't move at a constant speed, like the MRT train, which begins at a station at rest, accelerates until it reaches constant speed (also called cruising speed), then slows down to a stop at the next station. Thus, defining average speed <v> as opposed to actual speed v is more beneficial.
We know that average speed = sum of distance/ sum of time
Here given that distance is 245 miles and time is 2 hours
So, Speed is
s = d/t
= 245/2
= 122.5 miles/h
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Divide 2.0075 by 0.00062, how many sig figs does your answer have
Answer:
the answer is 2 sig figs
hope this will help you ❤️
Where do you think are the sugar particles in the water?
Answer:
When we dissolve sugar in water,the particles of sugar get into the spaces between the particles of water which is known as the intermolecular spaces.
The sugar particles are dissolved in the water and form a homogeneous solution.
When sugar dissolves in water, the molecular structure of water surrounds the individual molecules of sugar and pulls them away from each other.Sugar molecules are polar molecules that have both positive and negative charges. Because the water molecule is also a polar molecule, the sugar molecules are attracted to the water molecule's opposite charges. As a result, the sugar molecules dissolve in water, and the mixture becomes a solution. As a result, the sugar particles are distributed uniformly throughout the water, and no sugar particles are visible.This indicates that the sugar particles are in the space between water molecules.
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A student leaves a 10.0 g ice cube in a sealed flask on the lab table. After some time, the ice melts. What is the mass of the liquid?Less than 10.0 g10.0 gNot enough informationGreater than 10.0 g
Step 1 - Understanding the law of mass conservation
In physics, chemistry and biology the law of mass conservation states that no atom is created or destroyed, they are only rearranged in any given physical/chemical/biological process.
Therefore, if all atoms are preserved, the total mass of reactants and products is the same.
Step 2 - Answering the exercise
The melting of an ice cube is a physical process and, as such, is also subjected to the law of mass conservation. Therefore, if 10g of ice melt, 10g of water are produced.
Answer: 10.0g
Name the gas being described in each of the following cases.
a) A green gas that bleaches damp litmus paper
b) A gas that dissolves readily in water to produce a solution
with a pH of about 11.
c) A gas that produces a white precipitate with calcium
hydroxide solution
d) A gas that pops when a lighted splint is placed in it.
e) A gas that relights a glowing splint.
Urgent!!!
will give the brainliest!
plz answer correctly
Explanation:
a cl chlorine
b NH3 ammonia
c co2 carbon dioxide
d H hydrogen
e o oxygen
What is an alloy?
Answer question 2 if you want.
Answer:
An alloy is a combination of metals or metals combined with one or more other elements. For example, combining the metallic elements gold and copper produces red gold, gold and silver becomes white gold, and silver combined with copper produces sterling silver. Elemental iron, combined with non-
Explanation:
that's what an alloy is all the rocks including gold silver combined with copper and sterling silver
How is protein synthesis affected if the normal base sequence CCC In the DNA template strand is changed to GAC? Match the words in the left column to the appropriate blanks in the sentences on the right. -Gly -Ala -Glu -Pro -Leu -Asp -Val -Tyr ADNA base sequence of CCC produces the mRNA codon that codes for ___.The mutation GAC produces the mRNA codon that codes for___. Since their R groups are different, the mutation could cause structural problems in the new Pro protein.
DNA base sequence of CCC produces the mRNA codon that codes for r Asp amino acid. The mutation GAC produces the mRNA codon that codes for Glycine (Gly) amino acid. Since their R groups are different, the mutation could cause structural problems in the new Pro protein.
Protein synthesis is affected if the normal base sequence CCC in the DNA template strand is changed to GAC. When the normal base sequence CCC in the DNA template strand is changed to GAC, protein synthesis is affected.
This is because the new DNA template sequence is GAC, which is then transcribed into a messenger RNA (mRNA) sequence with a corresponding GAC codon that codes for Asp amino acid instead of Pro. As a result, the protein sequence changes and a new protein is produced with a different amino acid sequence.
In detail, the normal DNA base sequence CCC codes for Proline (Pro) amino acid. CCC is transcribed into messenger RNA (mRNA) codon GGG that codes for Glycine (Gly) amino acid. If the DNA base sequence CCC is mutated into GAC, the new mRNA codon is GAC, which codes for Aspartic acid (Asp) amino acid instead of Proline (Pro).
This changes the sequence of amino acids in the protein chain, causing structural problems if the substitution of the amino acid affects the folding of the protein. For instance, the substitution of Pro to Asp in the protein sequence might lead to structural problems.
This is because Proline has a unique ring structure that helps the protein maintain a particular shape. The aspartic acid has a carboxyl group, which could cause structural problems in the protein chain. Additionally, the change in the amino acid sequence might affect the protein's biological function and cause an alteration in its physiological properties.
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Pure water has a pH of 7. Pure water
OA. is an acid
OB, is a base
OC, is a neutral substance
OD could be either an acid or a base
Answer: a neutral
Explanation: it’s an neutral because it’s all alone and there’s no chemicals
Lower the Room temp. to -10.0 °C, wait until all the water has frozen, and then wait a little while more. What happens to the ice temperature after all the water is frozen?
No link or Files Plzz
Answer:
the ice becomes -20 degrees celcius colder
Explanation:
help needed asap grades due tmr
Gay-Law Lussac's says that when the volume is held fixed, the pressure of a particular quantity of gas changes directly with the absolute temperature of the gas.
What is pressure temperature equation?These formulae are special instances of the ideal gas law, PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of gas, T is its kelvin temperature, and R is the ideal (universal) gas constant.
Temperature and pressure are found to be linearly linked, and if the temperature is on the kelvin scale, P and T are directly proportionate (again, when volume and moles of gas are kept constant); if the temperature on the kelvin scale rises by a certain amount, so does the gas pressure.
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