The new pressure be if pressure is kept constant, to compress nitrogen is 3 atm.
Why Boyle's Law is important?Boyle's law is significant because it explains how gases behave. It explains with certainty that the relationship between gas pressure and volume is inverse. So, when you exert pressure on gas, the volume decreases and its pressure increases.
Briefing:P1V1 = P2V2
P1 and V1 are initial pressure and volume.
P2 and V2 are final pressure and volume.
P1 = 1 atm
V1 = 750 mL
P2 = ?
V2 = 500 mL
Putting values
2 * 750 mL = P2 * 500 mL
P2 = 3 atm
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What is the difference between changing a subscript in a chemical formula and changing a coefficient?.
Answer:
The coefficient is the number of molecules and the subscript is the number of atoms
Explanation:
You can change the coefficient to balance an equation but, never touch the subscript. It cannot be changed.
What are two commonly used types of electron microscopes?
explain
calculate the amount of heat (in ) required to convert of water to steam at . (the molar heat of vaporization of water is .)
The amount of heat required to convert of water to steam is40.79 kJ/mol. The energy needed to turn 62.6 g of water into steam at 100°C is 141.86 kJ.
The equation is used to represent the formula for determining the necessary quantity of heat; as a result, 141.86 kJ of heat are needed to turn 62.6 g of water into steam at 100°C. Each material has a unique molar heat of vaporization. Kilojoules per mole (kJ/mol) are the units used to measure the molar heat of vaporization. The unit J/g is occasionally employed. In that situation, the term "molar" is dropped in favor of "the heat of vaporization."
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If I have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, what will be the temperature of the gas if I decrease the volume of the gas to 2.4 decrease the pressure to 3.0 atm?
According to the ideal gas law, the relationship between the pressure, volume, and temperature of a gas is given by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.
If we have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, we can calculate the temperature of the gas if we decrease the volume of the gas to 2.4 and decrease the pressure to 3.0 atm by rearranging the ideal gas law equation as follows:
T = (PV) / (nR)
In this equation, T represents the temperature of the gas, P represents the pressure of the gas, V represents the volume of the gas, n represents the number of moles of gas, and R represents the ideal gas constant.
Plugging in the values from the problem into the equation, we get:
T = (5.0 atm * 2.9 L) / (n * 0.08206 L*atm / mol*K)
T = (14.5 L*atm) / (n * 0.08206 L*atm / mol*K)
T = (14.5 L*atm) / (n * 0.08206 L*atm / mol*K)
T = 177.2 K
Therefore, if we have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, and we decrease the volume of the gas to 2.4 and decrease the pressure to 3.0 atm, the temperature of the gas will be 177.2 K.
calculate the standard entropy of vaporization of ethanol at its boiling point, 352 k. the standard molar enthalpy of vaporization of ethanol at its boiling point is 40.5 kj/mol.
The standard entropy of vaporization of ethanol at its boiling point 352K is 115.056 J/K-mol.
Given,
Enthalpy of vaporization of ethanol = 40.5 kJ/mol = 40.5 × 10³ J/mol
Entropy of vaporization of ethanol boiling point = 352 K
Determine the standard entropy of vaporization of ethanol,
We get here standard entropy of vaporization of ethanol that is expessed as,
Standard entropy of vaporization of ethanol ΔS = ΔH/T .............1
Here ΔH is enthalpy of vaporization of ethanol and T is the temperature.
Substitute the values in equation 1
Standard entropy of vaporization of ethanol ΔS = ΔH/T
= [40.5 × 10³] / 352
= 40500/352
= 115.056 J/K-mol.
Hence, the standard entropy of vaporization of ethanol at its boiling point 352K is 115.056 J/K-mol.
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if atmospheric greenhouse gas concentrations were held constant at their present levels today, how would the atmosphere and ocean respond?
Answer:
Global average temperatures and sea level would stay the same due to there being no change in atmospheric greenhouse gasses.
What mass of magnesium will react with an excess of hydrochloric acid to produce 500 mL of H2 (g) at STP?
0.00486 g of magnesium will react with an excess of hydrochloric acid to produce 500 mL of H2 (g) at STP.
What is ideal gas law?The ideal gas is the virtual gas that chemists and students dream of because it would be much simpler if there weren't some kind of intermolecular force that would complicate the simple law of the ideal gas. An ideal gas is essentially a point cloud moving with constant random linear motion. Its behavior is described by the assumptions described in the kinetic molecular theory of gases. This ideal gas definition contrasts with the non-ideal gas definition. This is because this equation describes how gases actually behave.
The ideal gas law states that the product of pressure and volume in a gram molecule of an ideal gas is equal to the product of the gas's absolute temperature and the universal gas constant.
PV = nRT
Where, n = number of moles.
P = Pressure (1 atm)
T = Temperature (273 K)
V = Volume (0.5 L)
R = Ideal gas constant (8.314J/K⋅mol)
Now, substitute the values:
1 × 0.5 = n × 8.314 × 273
n = 0.00022 moles
Mg + 2HCl → MgCl₂ + H₂
The mole ratio of Mg and H₂ is 1:1 for the given reaction
Hence the number of moles for Mg will be same as H₂, which is 0.00022 moles.
For the mass of Mg:
m = n × Mm
Where, m = mass
n = number of moles (0.00022 moles)
Mm = molar mass (24.3 g/moles)
m = 0.00486 g
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describe the form of the equilibrium constant expression in terms of the concentrations of the reactants and products
The equilibrium constant, Kc, is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients.
For a reaction: aA + bB→ cC + dD
Equilibrium constant: Kc=[tex][C]^{c}[D]^{d}[/tex]/ [tex][A]^{a} [B]^{b}[/tex]
Characteristics of Kc:
1) Equilibrium can be approached from either direction.
2) Kc does not depend on the initial concentrations of reactants and products.
3) Kc does depend on temperature.
Magnitude of Kc:
1) If the Kc value is large (Kc >> 1), the equilibrium lies to the right and the reaction mixture contains mostly products.
2) If the Kc value is small (Kc <<1), the equilibrium lies to the left and the reaction mixture contains mostly reactants.
3) If the Kc value is close to 1 (0.10 < Kc < 10), the mixture contains appreciable amounts of both reactants and products.
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What is a noble gas that is not neon, that has a mass less than 30
Answer: helium
Explanation:
The noble gas that is not neon and has a mass less than 30 is helium.
A noble gas is a group of chemical elements that are odorless, colorless, and non-reactive under normal conditions. They are located in Group 18 (VIII A) of the periodic table and include helium, neon, argon, krypton, xenon, and radon.
Helium is the second lightest element on the periodic table, with an atomic mass of 4.003. It is a colorless, odorless, and tasteless gas that is non-toxic and non-flammable.Helium is the least reactive of all the elements and is often used as a coolant in scientific and medical applications. It is also commonly used in balloons and airships because it is lighter than air.In conclusion, helium is a noble gas that is not neon and has a mass less than 30. It is an important element in science, medicine, and industry, and it has many unique properties that make it useful for a wide range of applications.
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write the chemical equation for the reaction of with . is the bisulfite ion functioning as an acid in this reaction, or is it functioning as a base?
Answer:
This is ez 123 me no eleglesh
Explanation:bn
Assume that all the copper in your trial reacts because there is plenty of silver nitrate available. How much silver would be produced?
If all the copper in the trial reacts, then the amount of silver produced would be equal to the amount of copper present.
What is Silver nitrate?
Silver nitrate is a chemical compound with formula AgNO3. It is a strong oxidizing agent and is commonly used in chemistry experiments, photography, and in medical applications such as wound care. Silver nitrate is also used in some antiseptic products and in certain types of contact lenses.
Therefore, if the trial mentioned above contains 1 gram of copper, then 1 gram of silver would be produced.
What is Copper?
Copper is a reddish-brown metal that is malleable and ductile, and is one of the most conductive elements on the periodic table. It is often used in electrical wiring, piping, and other industrial applications because of its high electrical and thermal conductivity.
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Explain the equation =
CH4 + O2 --> CO2 + 2H20.
Explanation:
The equation describes the combustion of methane (CH4). Methane burns in oxygen (O2) to produce carbon dioxide and water.
The equation is also not balanced. O2 should have a coefficient of 2.
what are the values of the nuclear charge z and quantum number n for the least-bound electron in the ground state of li ?
The nuclear charge for Ze is 3e and effective nuclear charge is 1.26e and for the quantum number is 2.
What is ionization energy for an atom?
The ionisation energy is a metric indicating an element's capacity to engage in chemical processes that call for the donation of electrons or the production of ions. It is also often correlated with the type of chemical bonding that occurs when elements combine to form compounds.
I= 13.1×10²Z (eff)/n²
Zeff = √I×n²/13.1ₓ10²
for lithium I = 520.2
Z²eff = 520.2×4/13.1×10²=1.56
Zeff= 1.26 e
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A student determines that a 3.0 g mixture of ZnO(s) and Ag2O(s) contains 0.010 mol of ZnO(s). Based on the student's measurement, what is the mass percent of Zn in the mixture? Choose 1 answer: A B C D 11% 22% 44% 88%
The mass per cent of Zn in the mixture is 22%.
What is Mass percent?Mass percent is a means to describe a component in a specific combination or to convey a concentration. The mass percentage used to describe the solution composition indicates the mass of solute contained in a given mass of solution. The solute's concentration is specified in terms of mass or moles. The mass percent of a solution is calculated by multiplying the grams of solute per gram of solution by 100 to get the percentage.
What are the calculations?mass of the mixture = 3.0 g
moles of ZnO in the mixture = 0.010 mol
mass of ZnO in the mixture = moles × molar mass
= 0.010 mol × 81.38 g/mol
= 0.8138 g
now mass percent of ZnO in the mixture = mass of (ZnO/Total mass) × 100.
27%
now, 81.38 g of ZnO contains = 65.38 g of Zinc.
0.8138 g of ZnO contains = (65.38 / 81.38) × 0.813 g
= 0.6538 g.
so, mass % of Zn in the mixture = (Mass of Zn/ Total Mass) × 100
= (0.6538 g /3 g) × 100
= 22%
Hence, the mass percent of Zn in the mixture is 22%.
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4. Lithium + tin(IV) sulfite ® lithium sulfite + tin-
2Li2S + Sn(SO4)2 → 2Li2(SO4) + SnS2 is Balanced chemical equation.
What is Balanced chemical equation?
A balanced chemical equation is a chemical reaction that has equal numbers of moles of chemical substances both in the reactant and the product side.
A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides.
In a balanced chemical equation, the mass and the change are both equal.
From the missing image that is attached below, we can see that the picture depicts that we have:
The reactant side:
3 molecules of CH₄ and 3 molecules of N₂Cl₄
The product side:
3 molecules of CCl₄, 3 molecules of N₂ and 6 molecules of H₂
Therefore, the balanced chemical equation for the reaction is:
3CH₄ + 3 N₂Cl₄ → 3 CCl₄ + 3N₂ + 6H₂
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The chemical equation is balanced correctly.
Which compound is represented by X?
C6H1₂O6(aq)-enzyme2X +2CO₂(g)
A chemical equation is balanced correctly is CH3CH2OH(aq) . The compound is represented by X is CH3CH2OH(aq).
Is ethanol a liquid or aqueous?The chemical formula for ethanol, which is an alcohol, is C2H5OH, where C, H, and O stand for carbon, hydrogen, & oxygen atoms, respectively.The colorless, clear liquid ethanol has a similar appearance to water and is totally miscible with it.
Is HC3CH2OH a weak acid?You virtually ever consider ethanol, CH3CH2OH, to be acidic because of how weakly basic it is.An ethoxide ion is created when the hydrogen-oxygen link dissociates to release an hydrogen ion:This has almost nothing to recommend it.
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My hypothesis is that the higher the concentration of thiosulphate is the faster the reaction rate is. In the lab, I added HCL to the thiosulphate and recorded the time. Then I had to determine the concentration of thiosulphate and the reaction rate. What are two non-human sources of error?
To solve such this we must know the concept of chemical reaction. Therefore, the rate of reaction increases as the concentration of HCl increases.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The rate of reaction depends on the number of collisions among the reactants and their orientation. As the number of concentration of reactants increases, the number of collisions increases and the rate of reaction also increases.
Therefore, the rate of reaction increases as the concentration of HCl increases.
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if the combustion of 42.62 g of c4h10 produces 87.85g of co2. what is the percent yield of the reaction? (assume oxygen is in excess.)
The balanced chemical equation for the combustion of C4H10 is C4H10 + 6O2 → 4CO2 + 5H2O.
So,
The moles of C4H10 consumed in the reaction is 42.62 g / (58.12 g/mol) = 0.732 mol.
The moles of CO2 produced in the reaction is 87.85 g / (44.01 g/mol) = 1.99 mol.
The percent yield of the reaction is (1.99 mol CO2 / 0.732 mol C4H10) x 100% = 271.7%.
Define Combustion?
Combustion is a chemical reaction between a fuel and an oxidizer where heat and light energy is released. It is also referred to as burning. In the case of fossil fuels, the fuel is mainly hydrocarbons and the oxidizer is the oxygen in the air. The reaction is exothermic and produces water, carbon dioxide, and other byproducts.
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How many joules are needed to change the temperature of 40 g of water from 33 0C to 23 0C?
Can ya help me know what goes in the blanks
Friction provides the traction you need to walk without slipping. Friction helps in most cases. However, they also offer great resistance to applications. Additionally, about 20% of a car's engine power is used to overcome the frictional forces of moving parts. Let's take a look at some of these factors in the next section. All four types of friction are different from each other. Static friction, for example, is the friction that acts between surfaces when they are at rest against each other. In contrast, sliding friction is the resistance that occurs when two bodies slide over each other.
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identify the catalytic cofactors of the pyruvate dehydrogenase complex. thiamine pyrophosphate fad biotin nad lipoic acid
The catalytic cofactors of the pyruvate dehydrogenase complex are TPP, lipoic acid, and flavin adenine dinucleotide (FAD).
What is lipoic acid?
Lipoic acid (l. a.), also known as α-lipoic acid, alpha-lipoic acid (ALA) and thioctic acid, is an organosulfur compound derived from caprylic acid (octanoic acid).ALA is made in animals generally, and is critical for cardio metabolism.it's also manufactured and is available as a dietary complement in a few countries where it's far marketed as an antioxidant, and is available as a pharmaceutical drug in different international locations. Lipoate is the conjugate base of lipoic acid, and the most universal shape of la beneath physiological situations.Most effective, the (R)-(+)-enantiomer (RLA) exists in nature and is important for aerobic metabolism because RLA is a critical cofactor of many enzyme complexes.To know more about lipoic acid, click the link given below:
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why do adults make a bigger splash when they jump into the swimming pool
thermohaline circulation is driven by: group of answer choices the coriolis effect. longitude. density differences. wind. latitude.
thermohaline circulation is driven by: density differences
Mass per unit volume is measured using the density unit. Given that it is an intense property, the size of the item has no bearing on the value of the property. Density Physics-related meaning The mass-to-volume ratio of an object is known as its density in physics. Mass per unit volume is a frequent definition. Chemistry's use of density The density of a substance in chemistry is a measurement of how much mass there is per unit volume. It is a physical characteristic that is intense, which means that the size of the object has no bearing on its value.
thermohaline circulation is driven by: group of answer choices the coriolis effect. longitude. density differences. wind. latitude.
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a chemist must dilute of aqueous nickel(ii) chloride solution until the concentration falls to . he'll do this by adding distilled water to the solution until it reaches a certain final volume. calculate this final volume, in milliliters. round your answer to significant digits.
The final volume is 15.3 mL, the concentration of solution ,He will accomplish this by gradually adding distilled water to the mixture according to law of equivalence-until it reaches a particular final volume.
According to law of equivalence-
where is initial concentration, is the final concentration, is the initial volume and is the final volume.
Here = 7.27 M, = 12.6 mL, = 6.00 M
So, the final volume is 15.3 mL
The law of equivalence , equivalents of one material will always be equal to the equivalents of the other when two substances react, and the equivalents concentration of any product will always be equal to that of the concentration.
The complete question is:
A chemist must dilute 12.6mL of 7.27 M aqueous sodium nitrate (NaNO3) solution until the concentration falls to 6.00 M.He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Be sure your answer has the correct number of significant digits.
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if your isolated product has succinimide present, what key feature should be present in the ir spectrum of your product?
if your isolated product has succinimide present, the key feature should be present in the ir spectrum of your product is in the IR spectra should show a prominent peak at around 1700 cm⁻¹,
What is the function of succinimide?These chemicals have several uses. The succinimides ethosuximide, phensuximide, and methosuximide are among the drugs used as anticonvulsants. Succinimide is also used in various assays to create covalent bonds between peptide or protein chains and polymers.
How does succinimide work?Succinimide inhibits voltage-dependent calcium leakage in thalamic neurons by acting on calcium T channels. Any gastrointestinal "vomiting, nausea, or abdominal discomfort." or central nervous system are side effects of ethosuximide (lethargy, dizziness, ataxia).
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A researcher studying the nutritional value of a new candy places a 4.20 g
sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.62 ∘C.
If the heat capacity of the calorimeter is 48.10 kJ⋅K−1,
how many nutritional Calories are there per gram of the candy?
The energy that is contained in the candies is 7.2 cal/g.
What is the calorimeter?We know that the calorimeter is a device that can be used to measure the amount of energy that is contained in a substance. We can see that in this case, we have ben told that the the observed temperature increase is 2.62 ∘C. If the heat capacity of the calorimeter is 48.10 kJ⋅K−1.
We now have the heat or the energy that is contained in the candy as;
H = cdT
c = heat capacity of the calorimeter
dT = The temperature change
Hence;
H = 48.10 kJ⋅K−1 * 2.62 ∘C
H = 126 kJ or 30.11 cal
The nutritional Calories are there per gram of the candy;
30.11 cal/4.20 g
= 7.2 cal/g
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what gas has increased in our atmosphere from 300 parts to 410 parts since 1950: 1) nitrogen, 2) carbon dioxide, 3) oxygen, 4) political hot air.
Gas that has increased in our atmosphere from 300 parts to 410 parts since 1950 is : 2) carbon dioxide (CO₂). It first exceeded 300 parts per million threshold in the 1950s and today it is over 410 parts per million.
What gas has increased in our atmosphere ?The concentration of carbon dioxide in the atmosphere is currently nearly 412 parts per million. This shows a 47 percent increase since the beginning of the Industrial Age when the concentration was nearly 280 ppm.
The atmospheric level of carbon dioxide has been rising since the 1960's. In 2021, atmospheric carbon dioxide levels reached 416.45 parts per million in comparison to 1960 levels which was 316.91 parts per million.
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PLEASE HELP 100 POINTS!!!! AND GIVING BRAINLIEST!!!!!!!!
Why should a movie producer consider filming a new version of The First Men in the Moon? Create a 6-8 slide multimedia presentation to market your idea for this movie to a production company. Rubric Criteria Points Possible 20 (10) 11-19 (6-9) 6-10 (3-5) 0-5 (0-2) Points Earned Ideas & Content Relates Theme of Novel Provides analysis of character Accurate diagram of plot 20 Establishes a theme, relates an analysis of the protagonist, effectively summarizes the plot, and maintains a clear focus throughout. Establishes a theme, identifies some character traits of the protagonist, provides a summary of the plot, and maintains focus throughout. There are a few lapses in focus, but the theme is fairly clear. Presents somewhat of an analysis of character. The plot summary is mostly correct. It is difficult to figure out the theme of the novel. The character analysis is poor or not present. The plot summary does not accurately represent the story. Organization Structure Precision Focus 20 Strong organization; seamless transitions between ideas; Effective and precise content. Organization is appropriate but conventional; Attempt at a focused and precise sales pitch. Attempts at organization, inappropriate use of lists or bullets; content is unfocused and ideas are not developed No clear organizational framework or transitions. Ideas are vague or unfocused Voice Personality Sense of audience 20 Strong awareness of audience in the design. Students can clearly explain why they felt the vocabulary, audio and graphics chosen fit the target audience. Some awareness of audience in the design. Students can partially explain why they felt the vocabulary, audio and graphics chosen fit the target audience. Some awareness of audience in the design. Students find it difficult to explain how the vocabulary, audio and graphics chosen fit the target audience. Limited awareness of the needs and interests of the target audience. Images and Music Relevance to theme Effectiveness Imagery 10 Images and music stir a rich emotional res
Answer:-Science have researched more facts and cool things about it-It would have more facts and things to learn-The quality would be better and more understandingI just tried 3 quick ideas I hope it can help a bit
Explanation:
Answer:
the answer is you should know this already :)))))))))))))))))))))))))))))))))))))))))))))))))))
How many grams of Ag2S2O3 form
when 125.0 g AgBr reacts completely
according to the reaction below?
2AgBr + Na2S2O3 → Ag2S2O3 + 2NaBr
Ag2S2O3: 327.74 g/mol
AgBr: 187.70 g/mol
[ ? ] g Ag₂S2O3
The mass (in grams) of Ag₂S₂O₃ formed when 125 g of AgBr react completely is 109.13 g
How do I determine the mass of Ag₂S₂O₃ formed?We can obtain the mass of Ag₂S₂O₃ formed by doing the following:
2AgBr + Na₂S₂O₃ -> Ag₂S₂O₃ + 2NaBr
Molar mass of AgBr = 187.70 g/molMass of AgBr from the balanced equation = 2 × 187.70 = 375.4 gMolar mass of Ag₂S₂O₃ = 327.74 g/molMass of Ag₂S₂O₃ from the balanced equation = 327.74 gFrom the balanced equation above,
375.4 g of AgBr reacted to produce 327.74 g of Ag₂S₂O₃
Therefore,
125 g of AgBr will react to produce = (125 × 327.74) / 375.4 = 109.13 g of Ag₂S₂O₃
Thus, the mass of Ag₂S₂O₃ formed is 109.13 g
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2. 05 g of an unknown gas at stp fills a 500. Ml flask. What is the molar mass of the gas?.
The molar mass of the unknown gas in the 500 mL flask at stp is 89.7 g/mol
We'll begin by calculating the number of mole of the gas that occupied 500 mL at stp.
Recall at stp:
22400 mL = 1 mole of the gas
Therefore,
500 mL = 500 / 22400 = 0.0223 mole of gas.
Finally, we shall determine the molar mass of the gas. This can be obtained as follow:
Mass of gas = 2 g
mole of gas = 0.0223 mole
Molar mass of gas =?
Molar mass = mass / mole
Molar mass of gas = 2 / 0.0223
Molar mass of gas = 89.7 g/mol
Therefore, the molar mass of the unknown gas is 89.7 g/mol
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