A helium-filled weather balloon has a volume of 777 L at 17.9°C and 753 mmHg. It is released and rises to an altitude of 3.95 km, where the pressure is 539 mmHg and the temperature is –6.1°C. The volume of the balloon at this altitude is  L.

Q: What is the density of a sample of argon gas at 55°C and 765mmHg?a) 2.99 g/L b) 1.13 * 103g/Lc) 1.49…

A: The given problem can be solved by using the formula as:  dRT=PM…

Q: What is the density of a sample of argon gas at 55 °C and 765 mmHg?a) 2.99 g/Lb) 1.13 * 103 g/Lc)…

A: Relation between molar mass and density- Ideal gas equation is, PV= nRT Where, P=pressure, V=Volume,…

Q: A very flexible helium-filled balloon is released from the ground into the air at 20. °C. The…

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Q: The combustion of octane, C,H,3, proceeds according to the reaction shown. 18 2 C,H13(1) + 25 0,(g)…

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Q: Hydrogen gas can be produced in the laboratory through the reaction of magnesium metal with…

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Q: The combustion of octane, C8H18 , proceeds according to the reaction shown. 2C8H18(I) + 25 O2…

A: The number of moles of carbon dioxide, produced in the reaction, is calculated as shown below where…

Q: A combustion reaction involving 628.0 g n-butanol (C,H100) occurs at 345.0 °C and 15.2 atm. What…

A: Given :-  Amount of butanol = 628.0 g  Temperature = 345.0 °C  Pressure = 15.2 atm  To calculate :-…

Q: This reaction occurred at 427 Kelvin, with 37 g of CH4 and an excess of oxygen. The carbon dioxide…

A: Consider the reaction of methane with excess of oxygen to give water an carbon dioxide as;…

Q: Consider the reaction: 2 Ag2O(s) ---------> 4 Ag(s) + O2(g) If this reaction produces 15.8 g of…

A: Mass of Ag = 15.8 g Molar mass of Ag = 107.9 g/mol Moles = massMolar mass=15.8 g107.9 g/mol=0.146…

Q: A 0.6333 g sample of a metal carbonate was reacted with hydrochloric acid. The carbon dioxide gas…

A: Given data, Mass of sample = 0.6333 g Temperature = 26.0oC Total pressure = 103.80 kPa = 1.024 atm…

Q: Magnesium burns in air to produce magnesium oxide, MgO, and magnesium nitride, Mg3 N2. Magnesium…

A: Given data: T= 20°C= 293K , P = 765 mm Hg =765/760 atm , mass of Magnesium nitride= 3.58 gm , R=…

Q: A sample of a breathing mixture for divers contained 34.3% helium, He; 51.7% nitrogen, N2; and 14.0%…

A: We have to calculate the density of the mixture.

Q: The combustion of octane, C,H,g, proceeds according to the reaction shown. 18 2CH18(1) + 25 O,(g) –…

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Q: A 2.85-g sample of an unknown chlorofluorocarbon decomposes and produces 564 mL of chlorine gas at a…

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Q: Consider the reaction: 2 Ag,0(s) - 4 Ag(s) + Oz(g) If this reaction produces 15.8 g of Ag(s), what…

A: Given: The reaction is as follows, The total pressure of the gas  is 752 mm Hg Mass of Ag produced…

Q: An underwater research station with a volume of 2.00x107 L needs a delivery of air that completely…

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Q: A helium-filled weather balloon has a volume of 774 L at 14.9°C and 753 mmHg. It is released and…

A: As you have posted two different questions and are not the sub-parts, so , here i have answered the…

Q: The combustion of octane, C,H,18, proceeds according to the reaction shown. 2 C,H,(1) +25 0,(g) 16…

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Q: 10. A 1.65-g sample of Al is reacted with excess HCl and the hydrogen produced is collected over…

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Q: The combustion of octane, C,H,8, proceeds according to the reaction shown. 2 C3H18(1) + 25 0,g) 16…

A: Number of moles of CO2 produced by combustion of 2 mol of octane = 16 mol Number of moles of CO2…

Q: A mixture of chromium and zinc weighing 0.363 grams was reacted with excess HCl. After all the metal…

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Q: A new greenhouse gas has been discovered. Answer the following questions to characterize this new…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: If the temperature of a gas confined to such a cylinder is raised from 221°C to 635°C, what is the…

A: Since the cylinder is confined means no change in moles of gas And pressure is also given constant…

Q: Aluminum reacts with chlorine gas to form aluminum chloride. 2Al(s)+3Cl2(g)→2AlCl3(s) What minimum…

A: Determine the number of moles of aluminum. The molar mass of aluminum is 27 g/mol. Number of moles…

Q: We find that a mass of 0.896 g of a gaseous compound, containing only nitrogen and oxygen, occupy a…

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Q: A 25.0 L container at 23.0 °C contains 60.54 g Ne and 167.6 g Kr. What is the total pressure of the…

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Q: The combustion of octane, C8H18 proceeds according to the reaction shown.…

A: The gaseous state is the state of matter with least intermolecular force of attraction between…

Q: The combustion of octane, C,H, proceeds according to the reaction shown. 18 2C,H18(0) + 25 0,(g) 16…

A: We can solve the problem by considering the ideal gas law.  PV = n. R. T Where  P = pressure of the…

Q: If the temperature of a gas confined to such a cylinder is raised from 245°C to 554°C, what is the…

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Q: Oxygen gas reacts with powdered aluminum according to the reaction:4 Al(s) + 3 O2(g) ------->2…

A: Given: Pressure= 782 mmHg= 782760atm=1.0289 atm Temperature= 25°C=25+273.15 K=298.15 K Mass of Al=…

Q: A meteorological balloon contains 206 L He at 26.6oC and 733 mm Hg. If the volume of the balloon can…

A: Initial volume = 206 L  Initial temperature = 26.6 °C ..Or  because  °C + 273 = k   ..so, 26.6 °C +…

Q: In a system, you have 246mmHg of Oxygen (P1), 385mmHg of Hydrogen (P2). and 288mmHg of Carbon (P3).…

A: Given : pressure of Oxygen, hydrogen and carbon.  To find : total pressure of the system.  Solution…

Q: A chemical reaction occurring in a cylinder equipped with a moveable piston produces 0.641 mol of a…

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Q: A volume of 2.6 L of air at 37°C is expelled from the lungs into cold surroundings at 0.8°C. What…

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Q: If the temperature of a gas confined to such a cylinder is raised from 272°C to 692°C, what is the…

A: At constant pressure, volume of the gas is directly proportional to its temperature. V1/T1 = V2/T2 =…

Q: What is the mass of 12.0L of Chlorine gas (Cl2, 70.9 g/mol) measured at 1250mmHg and 157C? a) 2.94…

A: We have 12 L of Cl2 gas measured at pressure of 1250 mmHg and 157°C. We have to calculate the mass…

Q: The mass of 1.12 L gas at STP is found to be 6.23 g. What is the molar mass of gas Y ?

A: Given data is: Volume of gas = 1.12 L  Given mass = 6.23 g The procedure to finding the molar mass…

Q: When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2 Al(s) + 6…

A: Given Chemical reaction:

Q: 1. If 4.000 grams of hydrogen peroxide is placed within a sealed 250 milliliter container at 500 K.…

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Q: The combustion of octane, C,H,2, proceeds according to the reaction shown. 2C,H18() + 25 0,(g)16…

A: 2 moles of octane give 16 moles of CO2. So, 354 mol of octane will give (8*354) = 2832 mol of CO2.…

Q: The combustion of octane, C8H18 proceeds according to the reaction shown.…

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Q: The combustion of octane, C,H8, proceeds according to the reaction shown. 2C,H (1) + 250,(g) 16…

A: Given, Moles of octane = 595 moles Temperature of reaction, T = 32oC Pressure of reaction, P = 0.995…

Q: we can estimate that its volume was 31,150 L given the dimensions recorded at the time. If the…

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Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A: Given, Volume of N2 at STP = 1580 LVolume of H2 at STP = 4240 LWe know that, at STP 1 mole of a gas…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)  According to the above reaction 1 mole of Nitrogen will react with 3…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

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Q: In a mixture of helium and chlorine, occupying a volume of 12.8 L at 605.6 mmHg and 21.6°C, it is…

A: We have given that  In a mixture of helium and chlorine, occupying a volume of 12.8 L at 605.6 mmHg…

Q: Calcium carbonate decomposes due to the effect of temperature producing calcium oxide and carbon…

A: Given: Mass of calcium carbonate i.e CaCO3 decomposing = 3.1 g Volume of cylinder = 1.45 L And…

Q: The combustion of octane, C8H18, proceeds according to the reaction shown. 2C8H18(l) + 25O2(g)…

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Q: Calcium hydride reacts with water to produce hydrogen gas according to the following reaction:…

A: Total pressure = 2 atm Temperature = 25 degree Celsius = 298 K Volume = 1000 L No of mole of…

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.