Answer:
D All of these
Explanation:
hope this helped
A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder. If the original pressure was 1.00 atm, the final pressure be _ atm. Answer in 3 sig figs.
Answer:
The answer to your question is P2 = 0.78 atm
Explanation:
Data
Temperature 1 = T1 = 263°K Temperature 2 = T2 = 298°K
Volume 1 = V1 = 24 L Volume 2 = V2 = 35 L
Pressure 1 = P1 = 1 Pressure 2 = P2 = ?
Process
1.- To solve this problem use the Combined gas law
P1V1/T1 = P2V2/T2
-Solve for P2
P2 = P1V1T2 / T1V2
-Substitution
P2 = (1)(24)(298) / (263)(35)
-Simplification
P2 = 7152 / 9205
-Result
P2 = 0.777
or P2 = 0.78 atm
The final pressure of the gas is 0.686 atm.
To determine the final pressure of the gas, we can use Boyle's Law, which states that for a fixed amount of gas at a constant temperature, the product of the initial pressure and initial volume is equal to the product of the final pressure and final volume. In this case, we can write:
P1V1 = P2V2
Substituting the given values:
(1.00 atm)(24.0 L) = P2(35.0 L)
Solving for P2:
P2 = (1.00 atm)(24.0 L) / (35.0 L) = 0.68571 atm (rounded to 3 sig figs)
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Write the formula for the binary compound iron (III) oxide. (a)FeO , (b)Fe(III)O (c),Fe3O2 ,(d)Fe2O3
Final answer:
The correct formula for iron (III) oxide is [tex]Fe_{2}O_{3}[/tex], where the subscript numbers indicate the ratio of iron to oxygen atoms required to balance the charges of the iron cations and oxide anions in the compound.
Explanation:
The formula for the binary compound iron (III) oxide is [tex]Fe_{2}O_{3}[/tex]. This compound is composed of iron and oxygen, where iron has a +3 oxidation state, known as iron (III). The correct formula is obtained by balancing the charges of the iron cations and oxide anions.
To balance the charges, we need two iron (III) cations (each with a charge of +3) to combine with three oxide anions (each with a charge of -2) to achieve electrical neutrality. The formula reflects the smallest whole number ratio of ions. Therefore, for every two iron ions, there are three oxide ions, giving us [tex]Fe_{2}O_{3}[/tex], which makes answer (d) the correct choice.
To preform Uranium-235 dating on a sample, what must be true?
Option A. The sample contains Uranium-235.
Is uranium-235 used in nuclear bombs?Most of the uranium used in current nuclear weapons is approximately 93.5 percent enriched uranium-235. Nuclear weapons typically contain 93 percent or more plutonium-239, less than 7 percent plutonium-240, and very small quantities of other plutonium isotopes.
Why is only uranium-235 used?Uranium is the fuel most widely used by nuclear plants for nuclear fission. Uranium is considered a nonrenewable energy source, even though it is a common metal found in rocks worldwide. Nuclear power plants use a certain kind of uranium, referred to as U-235, for fuel because its atoms are easily split apart.
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Help ASAP!! Based on the chemical reaction shown, the reactants and products are best classified as
NH3+ NaOCl → NaOH + NH2Cl
H3+ NaOCl → NaOH + NH2Cl
Answer:
the first one
Explanation:
as it contains in the product N so its the forst
place the following in order of increasing ionization energy: I, F, Br, Cl
Answer:
I, Br, Cl, F
Lowest --> Highest
Fluorine has the highest ionization energy due to less electron shielding compared to the other elements in the list.
what is an example of chemical weathering
1. acid rain falls on rocks
2. chemicals from plants on rocks
3. water reacting with minerals on rock
4. All
At what temperature will a balloon have a volume of 6.08 L if the temperature is 41.0 ℃ when its volume is 4.87 L? in kelvin
Answer:
T₂ = 251.6 K
Explanation:
Given data:
Initial temperature = 41°C
Initial volume = 4.87 L
Final volume = 6.08 L
Final temperature = ?
Solution:
Initial temperature = 41°C (41+273.15 = 314.15 K)
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
T₂ = V₂T₁ /V₁
T₂ = 4.87 L × 314.15 K / 6.08 L
T₂ = 1529.9 L.K / 6.08 L
T₂ = 251.6 K
A gas has pressure of 50.0 mmHG at a temperature of 540K. What will be the temperature if the pressure goes down to 3 mmHG
Answer:
32.4 K
Explanation:
From the given parameters;
Initial pressure P1= 50.0 mmHg
Initial temperature T1= 540K
Final Temperature T2 = ?????
Final pressure P2=3 mmHg
Now using this relationship;
P1/T1 = P2/T2
We have; P1T2= P2T1
Hence;
T2= P2T1/P1
T2= 3 ×540/50.0
T2= 32.4 K
I have 20 electrons and 4 energy levels. *
Answer:
Ca, also known as Calcium
Explanation:
Get a periodic table. In the top left hand corner are of each element's box is a number. This is how many protons are present. Protons are equal to electrons, therefore calcium has 20 electrons. It is in group 2A period 4 if that helps.
Compared to a 1.0-liter aqueous solution with a pH of 7.0, a 1.0-liter aqueous solution with a pH of 5.0 contains10 times more hydronium100 times more hydronium10 times more hydroxide100 times more hydroxide
A 1.0-liter aqueous solution with a pH of 5.0 contains 100 times more hydronium ions than a solution with a pH of 7.0, since the pH scale is logarithmic and a change of 1 unit corresponds to a tenfold change in ion concentration.
Explanation:The question concerns the comparison of hydronium ion concentrations in aqueous solutions with different pH levels. To analyze the difference between a pH of 7.0 and a pH of 5.0, we need to understand that the pH scale is logarithmic; a change of 1 unit on the pH scale corresponds to a tenfold change in hydronium ion concentration.
For a solution with a pH of 7.0, which is neutral, the concentration of hydronium ions is 1.0 × 10-7 M. An acidic solution with a pH of 5.0 has a higher concentration of hydronium ions because each unit decrease in the pH value corresponds to a tenfold increase in [H3O+]. So, moving from a pH of 7.0 to a pH of 5.0 (a difference of 2 pH units), the hydronium ion concentration increases by a factor of 10 for each unit decrease in the pH. This means that a pH of 5.0 represents a hydronium ion concentration that is 10 × 10 or 100 times greater than that of a solution with a pH of 7.0.
Therefore, compared to a 1.0-liter aqueous solution with a pH of 7.0, a 1.0-liter aqueous solution with a pH of 5.0 contains 100 times more hydronium ions. Hydroxide ions are not directly mentioned in this comparison, but if they were, their concentration would be 100 times less, as they are inversely related to the concentration of hydronium ions.
PLEASE HELP
A 700.0 mL gas sample at STP is compressed to a volume of 200.0 mL, and the temperature
is increased to 30.0°C. What is the new pressure of the gas in Pa?
(5 Points)
394 kPa
532 Pa
3.94 x 10^5 Pa
Answer:
P2≈393.609Kpa so I think the answer is 394 kPa
Explanation:
PV=mRT Ideal Gas Law
m and R are constant because they dont change for the problem. That means
PV/T=mR = constant
so P1*V1/T1=P2*V2/T2 and note that the temperatures are in absolute temperatures (Kelvin) because you can't divide by zero.
So P2 = P1*V1*T2/(V2*T1) = 101325 Pa * 700 mL * 303K/(200 mL*273K)
P2 = 393609 Pa
Answer:
3.94 x 10⁵ pascals
Explanation:
combined gas law problem
P₁V₁/T₁ = P₂V₂/T₂ => P₂ = P₁(V₂/V₁)(T₁2T₁)
P₁ = 1 atm at STP P₂ = unknown
V₁ = 700 ml V₂ = 200 ml
T₁ = 0°C = 273K T₂ = 30°C = 303K
P₂ = 1atm(700ml/200ml)(303K/273K) = 3.89 atm
3.89 atm = 3.89 atm(1.01 x 10⁵Pa/atm) = 3.94 x 10⁵ pascals
How are today's field galaxies different than distant ones?
Answer:
we cant see them since they are delayed by light years
Explanation:
Answer: The reason why galaxies appear so different between our local universe and the distant one is because we are observing galaxies at different stages of their evolution as we look out in space. Telescopes are time machines, albeit ones that run only in reverse, and so the farther out we look with them, the progressively younger universe we see. Furthermore, we do not observe the universe from any special vantage point. So if we make the reasonable assumption that the physical laws we measure in the local cosmos are universal, we can conclude that the galaxies we observe in the early universe are analogous to the predecessors of the local galaxies. Thus, the differences we see between the different populations of galaxies provide direct insights into the nature of galaxy evolutio
what acid occurs naturally in the body and performs important regulatory functions
Answer: carbonic acid
How many ml of 2.50 M NaOH solution are required to make a 525 mL of 0.150 M?
Answer:
31.5 mL of a 2.50M NaOH solution
Explanation:
Molarity (M) is an unit of concentration defined as moles of solute (In this case, NaOH), per liter of solvent. That is:
Molarity = moles solute / Liter solvent
If you want to make 525mL (0.525L) of a 0.150M of NaOH, you need:
0.525L × (0.150mol / L) = 0.07875 moles of NaOH
If you want to obtain these moles from a 2.50M NaOH solution:
0.07875mol NaOH × (1L / 2.50M) = 0.0315L = 31.5 mL of a 2.50M NaOH solution
Answer:
The correct answer is 31.5 ml
Explanation:
We have to dilute the more concentrated solution (2.50 M) to obtain a solution with a molarity of 0.150 M. We have the following data:
Initial concentration = Ci = 2.50 M
Final concentration = Cf = 0.150 M
Final volume = Vf = 525 ml
We consider the final and initial states and use the following expression to calculate the initial volume (Vi) in ml:
Ci x Vi = Cf x Vf
Vi= (Cf x Vf)/Ci = (0.150 M X 525 ml)/2.50 M = 31.5 ml
Can anyone help with this question?
Answer:
b
Explanation:
The gas molecules that make up air are in two rooms. The gas molecules in the kitchen are moving faster than the gas molecules in the bedroom. What does this mean?
A.The kitchen is smaller than the bedroom.
B. the temperature is higher in the bedroom.
C. The temperature is higher in the kitchen.
D.The rooms have two different kinds of air.
Answer:
c.) the temperature is higher in the kitchen
Explanation:
What are three anticipated uses of nitrogen when it is compressed to 2.4 million atmospheres?
Answer:
Explosive, Propellant and Semiconductor
Explanation:
Bonding between two elements of equal electronegativity would be
The given question is incomplete. The complete question is :
Bonding between two elements of equal electronegativity would be
a.100% covalent
b.50% ionic
c. metallic in character
d. primarily ionic
Answer: a. 100% covalent
Explanation:
An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal.
A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals. When the two non metals have equal electronegativities, the bond is called as non polar covalent.
Metallic bonding is the type of chemical bonding occurs between the atoms of a metals.In this type of bonding arises due to electrostatic interaction between the electron cloud of de-localized electrons with positively charges metal ions.
Final answer:
A bond between two elements with equal electronegativity is termed a pure or nonpolar covalent bond, characterized by equal sharing of electrons without charge separation on the molecule.
Explanation:
Bonding between two elements of equal electronegativity results in a pure covalent bond, also known as a nonpolar covalent bond. This type of bond forms when electrons are shared equally between the atoms. Since there is no significant difference in electronegativity, there are no stable regions of net negative or positive charge on the molecule's surface, meaning the bond is nonpolar.
Which of the following best describes how chemical changes differ from physical changes?
A. Physical changes produce no new substances and chemical changes do.
B. Physical changes always involve the formation of a gas while chemical changes may not.
C. Physical changes can occur inside or outside the substance; chemical changes always occur outside.
D. Physical changes involve a change of state; chemical changes involve a change of shape.
Answer:
A is the answer.
Explanation:
Physical changes do not change the substance's composition but just the outside qualities. However, chemical changes change the composition of the substance and it's chemical properties.
Answer:
A
Explanation:
For the equation P4 (s ) + 5 O2 (g ) → P4 O10 (s ) , if 3 mol of phosphorous react with 10 mol of oxygen, the theoretical yield of phosphorous (V) oxide will be
Answer:
Theoretical yield of P4O10 is 568g
Explanation:
Step 1:
The balanced equation for the reaction. This is illustrated below:
P4(s) + 5O2(g) → P4O10(s )
Step 2:
Determination of the limiting reactant.
From the balanced equation above, 1 mole of P reacted with 5 moles of O2.
Therefore, 3 moles of P will react with = 3 x 5 = 15 moles of O2.
We can see that a higher amount of O2 than what was given is needed to react with 3 moles of P. Therefore, O2 is the limiting reactant.
Step 3:
Determination of the theoretical yield of P4O10.
In this case the limiting reactant is used as it will produce the maximum yield of the reaction. The limiting reactant is O2. The theoretical yield of P4O10 is obtained as follow:
From the balanced equation above, 5 moles of O2 produced 1 mole P4O10.
Therefore, 10 moles of O2 will produce = (10 x 1) /5 = 2 moles of P4O10.
Next, we'll convert 2 moles of P4O10 to grams to obtain the desired result. This is illustrated below:
Number of mole of P4O10 = 2 moles
Molar Mass of P4O10 = (31x4) + (16x10 = 124 + 160 = 284g
Mass of P4O10 =?
Mass = mole x molar Mass
Mass of P4O10 = 2 x 284
Mass of P4O10 = 568g
Therefore, the theoretical yield of P4O10 is 568g.
Final answer:
The theoretical yield of phosphorus(V) oxide when 3 moles of phosphorus react with 10 moles of oxygen is 2 moles, with oxygen being the limiting reactant based on the stoichiometry of the reaction.
Explanation:
The question involves the reaction between phosphorus (P) and oxygen (O₂) to form phosphorus(V) oxide (P₄O₁₀). According to the balanced chemical equation, P₄ (s) + 5 O₂ (g) → P₄O₁₀ (s), 1 mole of phosphorus reacts with 5 moles of oxygen to produce 1 mole of phosphorus(V) oxide. To calculate the theoretical yield of phosphorus(V) oxide, we first determine the limiting reactant, which is the reactant that will be completely consumed first and thus limits the amount of product formed.
In this scenario, 3 moles of phosphorus are reacted with 10 moles of oxygen. Since phosphorus requires 5 moles of oxygen for every mole of phosphorus, 3 moles of phosphorus would require 15 moles of oxygen for a complete reaction. However, only 10 moles of oxygen are available, making oxygen the limiting reactant. Therefore, the theoretical yield of phosphorus(V) oxide would be based on the amount of oxygen available.
Since 5 moles of oxygen react with 1 mole of phosphorus to produce 1 mole of phosphorus(V) oxide, 10 moles of oxygen would react with 2 moles of phosphorus to produce 2 moles of phosphorus(V) oxide. Therefore, the theoretical yield of phosphorus(V) oxide using 10 moles of oxygen is 2 moles of phosphorus(V) oxide.
If the absolute temperature of a gas is doubled, what happens to the root‑mean‑square speed of the molecules? Nothing happens to the rms speed. The new rms speed is 4 times the original rms speed. The new rms speed is 2 times the original rms speed. The new rms speed is 1.414 times the original rms speed. The new rms speed is 1/2 the original rms speed.
Answer:
The new rms speed is 1.414 times the original rms speed
Explanation:
The rms speed (root-mean-square speed) of the molecules in a gas can be found by using the formula:
[tex]v=\sqrt{\frac{3RT}{M}}[/tex]
where
R is the gas constant
T is the absoolute temperature (in Kelvin) of the gas
M is the molar mass of the gas (the amount of mass per unit mole)
We can rewrite the equation as
[tex]v\propto \sqrt{T}[/tex] (1)
which means that the rms speed is proportional to the square root of the temperature.
In this problem, we are told that the absolute temperature of the gas is doubled, so the new temperature is
[tex]T'=2T[/tex]
Therefore, according to eq(1), we find that the new rms speed will be:
[tex]v\propto \sqrt{T'} = \sqrt{2T}=\sqrt{2} \sqrt{T}=\sqrt{2}v=1.414v[/tex]
So,
The new rms speed is 1.414 times the original rms speed
If the absolute temperature of a gas is doubled ; ( D ) The new rms speed is 1.414 times the original rms speed
The r.m.s speed of molecules in a gas can be calculated using the formula below ;
[tex]v = \sqrt{\frac{3RT}{M} }[/tex]
T = absolute temperature
R = gas constant
M = molar mass
Also ; The rms speed of gas molecules is directly proportional to [tex]\sqrt{T}[/tex]
i.e. v ∝ √T ----- ( 1 )
Given that the absolute temperature ( T ) is doubled the new value of T = 2T
Back to equation ( 1 )
v = √2T = √2 * √T
= 1.414
Hence we can conclude that If the absolute temperature of a gas is doubled The new rms speed is 1.414 times the original rms speed.
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Which of the following statements about gases is not correct? A. They have much lower densities than solids or liquids. B. They form homogenous mixtures regardless of the nature of gases. C. They have strong intermolecular forces causing the particles to cling together. D. They have high compressibility. E. They do not possess a shape of their own.
Answer:
C. They have stong intermolecular forces causing the particles to cling together.
Explanation:
Have you ever seen images where gases are all spread out and floating around? Well if you have, this is because the intermolecular forces are weak and are spreak apart. Contrary to this incorrect statement, solids have the stongest intermolecular force and cling together.
Answer:
C. They have stong intermolecular forces causing the particles to cling together.
Explanation:
Carbon reacts with oxygen to produce carbon dioxide (CO2 (g), Delta.Hf = –393.5 kJ/mol) according to the equation below. Upper C (s) plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g). What is the enthalpy change of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.. –393.5 kJ –196.8 kJ 196.8 kJ 393.5 kJ
Answer:
-393.5 kJ
Explanation:
E2020
The enthalpy of formation (delta Hf) of carbon dioxide from the reaction of carbon and oxygen is –393.5 kJ/mol
What is enthalpy change of a reaction?The enthalpy change the of a reaction is the amount of heat given off or absorbed when reactant molecules react to form products molecules.
Change in enthalpy = energy of bonds formed- energy of bonds broken.Carbon reacts with oxygen to produce carbon dioxide (CO2 (g), and enthalpy of formation, delta Hf = –393.5 kJ/mol). This means that 393.5 kJ of heat is given off when 1 mole of carbon dioxide is formed from carbon and oxygen.
Therefore, the enthalpy of formation (delta Hf) of carbon dioxide from the reaction of carbon and oxygen is –393.5 kJ/mol
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Can someone pls help me!
Answer:
the third one
Explanation:
they change overtime
What basic equation is used to calculate the ph of a solution
Answer: You can calculate the pH of an acid or base solution given the hydronium ion concentration by using the formula pH = -log [H3O+] or if given the hydroxide ion concentration by the formula [H3O+] = Kw / [OH-], then using the pH = -log [H3O+] formula.
The pH of a solution is calculated using the equation pH = -log[H3O+], which represents the negative logarithm of the hydrogen ion concentration. A pH less than 7 indicates an acidic solution, while a pH greater than 7 denotes a basic solution.
The basic equation used to calculate the pH of a solution is the negative, base-10 logarithm of the hydrogen ion (H+) concentration of the solution. This can be formally written as pH = -log[H3O+]. Using this equation, we can determine the acidity or alkalinity of a solution on a scale from 0 to 14.
A solution with a pH of 7 is considered neutral, with those pH less than 7 being acidic and those pH greater than 7 being basic or alkaline. For example, a solution with a pH 4 is ten times more acidic than a solution with a pH 5 since each pH unit represents a tenfold difference in H+ ion concentration.
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Why is it useful for the base pairs of dna to be held together by hydrogen bonds and not covalent bonds?
Answer:
Explanation:
hydrogen bond is a bond that is formed as a result of intermolecular forces that exist between hydrogen
and other atoms of electronegative elements such as oxygen and carbon. Since covalent bond is more stronger than hydrogen bond, with this it helps to hold DNA , proteins, molecules together, it brings about the stability of the double helix structure of DNA.
Therefore,it is useful for the base pairs of DNA to be held together by hydrogen bonds and not covalent bonds because Hydrogen bonds are crucial in DNA synthesis. and also it very easy for hydrogen bonds to be broken than covalent bonds. As a result of this, DNA can be easily unwind.
Hydrogen bonds hold DNA bases together because B. hydrogen bonds are easier to break allowing for DNA copying .
Covalent bonds would be too strong, hindering these processes.
Thus, the weaker nature of hydrogen bonds is essential for DNA functionality.Hydrogen bonds hold DNA bases together instead of covalent bonds primarily because hydrogen bonds are easier to break, allowing for DNA copying. Covalent bonds are significantly stronger than hydrogen bonds and would make the process of unzipping the DNA strands for replication and transcription much more difficult. The weaker nature of hydrogen bonds allows the DNA double helix to unzip relatively easily, permitting both strands to function as templates for replication.Furthermore, the cumulative effect of millions of hydrogen bonds holds the DNA strands together sufficiently, while still enabling the necessary biological processes.Thus, the correct answer is B. hydrogen bonds are easier to break allowing for DNA copying.
Correct question is: Why are hydrogen bonds holding DNA bases together instead of covalent bonds?
A. hydrogen bonds are stronger than covalent bonds
B. hydrogen bonds are easier to break allowing for DNA copying
C. enzymes cannot break covalent bonds
D. covalent bonds cannot attach purines and pyrimidines
The process of photosynthesis converts _____ energy into _____ energy.
A. light; chemical
B. chemical; light
C. mechanical; thermal
D. thermal; mechanical
Question 1
1
What happens when a beam of light hits an object?
The light passes through it.
O All the light is absorbed
O A shadow forms.
O All the light is reflected.
Question 2
Final answer:
The correct answer when a beam of light hits an object is that the light can be reflected, absorbed, or transmitted, depending on the material's properties. It is not exclusive to one single outcome.
Explanation:
When a beam of light hits an object, several outcomes are possible depending on the properties of the material: it can be reflected, absorbed, or transmitted. Reflection occurs when light waves bounce off an object, like seeing your reflection in a glass window. Absorbance happens when a material takes in the energy of a light wave, which may later be re-emitted in some cases, such as with phosphorescence. Lastly, transmission is when light passes through a material, like sunlight through a clear glass. So, when a beam of light hits an object, the correct answer is that all the light is not necessarily absorbed, reflected, or transmitted exclusively; it can be a combination of these interactions.
How hot will a 2.3 liter balloon have to get to expand to a volume of 7 L? Assume that the initial temperature of the balloon is 25 C?
Answer : The final temperature of balloon will be, 907 K
Explanation :
Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.
Mathematically,
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
where,
[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.
[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.
We are given:
[tex]V_1=2.3L\\T_1=25^oC=(25+273)K=298K\\V_2=7L\\T_2=?[/tex]
Putting values in above equation, we get:
[tex]\frac{2.3L}{298K}=\frac{7L}{T_2}\\\\T_2=906.95K\approx 907K[/tex]
Therefore, the final temperature of balloon will be, 907 K
Final answer:
To expand a 2.3 liter balloon to 7 liters at constant pressure, the temperature must be increased to approximately 630.20°C. This calculation is done using Charles's Law by setting up a proportion between initial and final volumes and temperatures and then converting the final temperature from Kelvins to Celsius.
Explanation:
To determine how hot a 2.3 liter balloon will have to get to expand to a volume of 7 liters, we can use Charles's Law. Charles's Law states that at constant pressure, the volume of a gas is directly proportional to its temperature in Kelvins. First, we convert the initial temperature of 25°C to Kelvins: 298.15 K (since 25 + 273.15 = 298.15). We then set up the proportionality constant using the initial conditions: V1 / T1 = V2 / T2. Substituting in our known values:
2.3 L / 298.15 K = 7 L / T2
Solving for T2 we get:
T2 = (7 L * 298.15 K) / 2.3 L
Calculating this we find T2 is approximately 903.35 K. However, to answer the question, we need to give the final temperature in degrees Celsius. Therefore, we subtract 273.15 from our final temperature in Kelvins: 903.35 K - 273.15 = 630.20°C. This is the temperature to which the balloon must be heated for it to expand to 7 liters.
Match the reaction on the top with the corresponding reaction on the left. *
hydrogen gas + oxygen gas → water gas 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g) When methane burns, it reacts with oxygen to produce water and carbon dioxide water → hydrogen + oxygen magnesium + oxygen → magnesium oxide
solid sodium + liquid water → aqueous sodium hydroxide + hydrogen gas
2H2(g) + O2(g) → 2H2O(g)
methane + oxygen → carbon dioxide + water
Electrolysis breaks down water to form hydrogen and oxygen gas
A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide
Answer:
Matching the reaction on the top with the corresponding reaction on the left:
Explanation:
A) 2Na(s) + 2H2O(l) = 2NaOH(aq) + H2(g)
is Electrolysis breaks down water to form hydrogen and oxygen gas
B) 2H2(g) + O2(g) = 2H2O(g)
is
A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide