Aluminum is one of the most versatile metals. It is produced by the Hall-Heroult process, in which molten cryolite, Na3AlF6, is used as a solvent for the aluminum ore. Cryolite undergoes very slight decomposition with heat to produce a tiny amount of F2, which escapes into the atmosphere above the solvent. Kc is 2 10-104 at 1300 K for the reaction. Na3AlF6(l) = 3 Na(l) + Al(l) + 3 F2(g) What is the concentration of F2 over a bath of molten cryolite at this temperature?

Q: A gas exerts 59.3 kPa on its container at 25.0 °C. What temperature is needed to increase the…

A: Using ideal gas equation and by modifying it according to given condition we can solve this problem.…

Q: Hydrogen sulfide (H2S) is a gas at 08C. When its temperature isdecreased, does it behave more or…

A: Ideal Gas law: It is an expression to study the ideal nature of gases. The equation is based on the…

Q: A gas mixture contains 10.0 mole% H 2O(v) and 90.0 mole% N 2. The gas temperature and absolute…

A: Given: χN2 is 0.1 χH2O is 0.1 As we know that the value of vapor pressure and partial pressure are…

Q: A cylinder of carbon dioxide, CO2, has an STP of —— at 273.15 k and 760 mmHg

A: solution- we know  We know that at STP 1 mole of any gas occupies 22.4 L

Q: Some indoor air-purification systems work by converting a little of the oxygen in the air to ozone,…

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Q: The airbags that protect people in car crashes are inflated by the extremely rapid decomposition of…

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Q: The partial pressures of H2 gas and O2 gas in a mixture are 2.35 atm and 1.09 atm, respectively.…

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Q: 4. The maximum safe pressure that a certain 4.00L vessel can hold is 3.50 atm. If the vessel…

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Q: The chlorination of methane occurs in a number of steps that results in the formation of…

A: The volume of methane gas is 201 mL which is equivalent to 0.201 L and the volume of chlorine gas is…

Q: A mixture consisting of “4” kg O2, “15” kg N2 and “2” kg CO2. The mixture has a pressure of 2 bar…

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Q: Acetylene gas can be produced by slowly reacting calcium carbide with water. CaC2(s) + 2H2O(l) ➡…

A: Given :  The given chemical reaction is  CaC2(s) + 2H2O(l) ➡ C2H2(g) + Ca(OH)2(s)   Mass of CaC2 =…

Q: About 8.0x 10 tons of urea 10NH,CO] are used annually as a fertilizer. The urea is prepared at…

A: Mass of urea 2.35 ton   Temperature 200°C = (273.15+200)K  Pressure = 145 atm  We have to calculate…

Q: Xenon and fluorine will react to form binary compounds when a mixture of the two gases is heated to…

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Q: Chlorine dioxide, ClO2, is sometimes used as a chlorinating agent for water treatment. It can be…

A: Given reaction is :  Cl2 (g) + 4NaClO (aq) ----------> 4NaCl (aq) + 2ClO2 (g) Volume of Cl2 = V…

Q: Combustion of hydrocarbons such as heptane (C,H16) produces carbon dioxide, a "greenhouse ga trap…

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Q: The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes…

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Q: A 0.11 g of H2O2(l) decomposes to O2 (g) and H2O(g) in a 2.5L flask at 25C? What is the pressure for…

A: Given:Mass of H2O2 = 0.11 g.Volume of flask = 2.5 L.Temperature = 25 oC = 298 K.Chemical reaction of…

Q: A sample of chlorine gas is loaded into a 0.25 L bottle at standard temperature (273K) of pressure…

A: We can solve it via two methods:- Method 1:-

Q: Everything needed is provided. A cylinder with a volume of 50.0 L contains a mixture of argon and…

A: Given : mole fraction of H2 gas in cylinder = 0.10  Total pressure of gaseous mixture = 120 atm…

Q: How many grams of zinc must be added to a 100-milliliter solution of 6.00 M HCl(aq) to produce 219…

A: Here, we have to calculate the mass of zinc that must be added to a 100-milliliter solution of 6.00…

Q: A 10.0 g sample of an unknown gas occupies 1.47 X 10-2 m3 at a temperature of 298 K (25 °C) and a…

A: The ideal gas equation is,PV=nRTP=pressureV=volume of gasn=number of molesnumber of moles =…

Q: What is the new temperature (in K) of a closed gas system, when its volume is compressed from 5.6 L…

A: Given that: initial volume, V1 =  5.6 L final volumeV2 = 2.3 L initial temperature, T1 =  455 K To…

Q: What is the partial pressure (in atm) of CO₂ at 468.2 K in a 25.0 L fuel combustion vessel if it…

A: PCO2 = ? T = 468.2 K V = 25.0 L nCO2 = 60.0g CO2×1 mol CO2/44.01g CO2  =1.363mol CO2 R = 0.0821…

Q: Cyclists sometimes use pressurized carbon dioxide inflators to inflate a bicycle tire in the event…

A: Given: Mass of carbon dioxide= 16.0g Temperature= 298K Volume of carbon dioxide= 3.45L To find: The…

Q: Silicon tetrachloride (SiCl4) and trichlorosilane (SIHC13 ) are both starting materials for the…

A: Given :  1. Temperature = 94°C  Or temperature = 94+273 K = 367 K 2. Pressure = 650 torr          1…

Q: The reaction of metallic aluminum with aqueous hydrochloric acid produces hydrogen gas. 2 Al(s) + 6…

A: The balanced reaction taking place is given as,

Q: Boron forms a variety of unusual compounds with hydrogen. A chemist isolated 6.3 mg of one of the…

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Q: If a sample of freon-12 gas occupies 350 cm3 at a pressure of 150 psi and a temperature of 15°C,…

A: Given : Initial pressure of gas = 150 psi Initial volume of gas = 350 cm3  Initial temperature = 15…

Q: A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the…

A: Dalton's law: Dalton's law of partial pressures states that in a mixture of non-reacting gases, the…

Q: In dry atmospheric air, the four most abundant components are N2, X = 0.808; 02, X = 0.1915; Ar, X =…

A: Given : Mole fraction of CO2 = 4.066 X 10-4  At standard atmospheric condition, the total pressure…

Q: what pressure is exerted by 870.2g of CH4 in a 0.630L steel container at 240.8K?

A: According to ideal gas law  PV = nRT  where P = pressure in atm  V = volume in L = 0.63 L (given) n…

Q: At 298 K, N,(g) + 3H2(g) 5 2NH3(g) K=5.8x105. At 298 K, NH3(g) S 1/2N,(g) + 3/2H,(g) K=1.3x10-3 Is…

A: Equilibrium constant: The relationship between the concentrations of the different substances…

Q: Acetylene gas can be produced by slowly reacting calcium carbide with water. CaC2(s) + 2H2O(l) ➡…

A: The given data- mass of calcium carbide = 35.0 g The pressure of the gas = 1 atm The temperature of…

Q: The airbags that protect people in car crashes are inflated by the extremely rapid decomposition of…

A: Given-> Volume of N2(g) = 87.0 L T = 12.0°C = 12.0 + 273 = 285 K P = 1 atm

Q: You want to reach a high boiling point in an aqueous system, so you increase the pressure in the…

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Q: Calcium carbide reacts with water to produce acetylene gas according to the following equation…

A: The given reaction is shown below.

Q: A vessel containing 39.9 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol.…

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Q: A 3.85 g sample of a KCl−KClO3 mixture is decomposed by heating and produces 117 mL O2(g), measured…

A: Given, V = 117 mL = 0.117 L as 1 mL = 0.001 L T = 23.5 + 273 = 296.5 K P = 110 kPa The value of R is…

Q: For air at 25 °C (77 °F) with 100% humidity, what is the partial pressure of oxygen (PO2)?

A: Given Air with 100% humidity at 25 °C.

Q: At 200atm pressure and 273.15K, PV=17.7dm³atm for 1mol of a gas A and PV=5.6dm³atm for 1mol of gas…

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Q: che partial pressure of O2(s

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Q: In a mixture of two gases, the partial pressure of methane is 0.175atm and the partial pressure of…

A: Given, Partial pressure of methane = 0.175 atmPartial pressure of oxygen = 0.250 atmVolume, V = 10.5…

Q: By volume, dry air is 78% N2, 21% O2 and 1% Ar. What is the partial pressure of each of these…

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Q: A compressed gas cylinder at 13,700 kPa and 23°C, is in a room where a fire raises the temperature…

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Q: The chlorination of methane occurs in a number of steps that results in the formation of…

A: Answer: This question is based on ideal gas equation which is shown below: PV=nRTP=nRTV Here:…

Q: For many purposes we can treat butane (C,H10) as an ideal gas at temperatures above its boiling…

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Q: What volume of water vapour (in L) will be produced during the production 291 L of hydrogen cyanide?…

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Q: Acetylene gas can be produced by slowly reacting calcium carbide with water. CaC2(s) + 2H2O(l) ➡…

A: The number of moles of calcium carbide that involve in the reaction is determined on substitution…

Q: iron(s) + hydrochloric acid(aq) ---> ferric chloride(aq) + hydrogen(g) How many grams of iron are…

A: The reaction taking place is given as, => Iron (s) + Hydrochloric acid (aq) ------> Ferric…

Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…

A: According to ideal gas law the volume of a gas is directly proportional to the number of moles,…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.