A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2 , and an unknown quantity of He. The temperature of the mixture is 0°C, and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture?

Q: Consider the chemical reaction: 2 H2O(l) --------> 2 H2(g) + O2(g) What mass of H2O is required…

A: The moles of O2 can be determined by using the ideal gas equation as:  PV=nRT…

Q: At 0 degrees C, a 1.0-L flask contains 5.0×10−2 mol N2, 1.5×102 mg O2, and 5.0×1021 molecules of…

A: Given, volume of flask V =1.0 Ltemperature T =0°C =273.15 Knumber of moles of N2 =5.0×10-2 mol =0.05…

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Q: At 1°C a 1.0-L flask contains 5.0 x 10 ^-2 mole of N2, 4.0 x 10^2 mg O2 , and 3.1 x 20^21 molecules…

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Q: What is the temperature, in K, of a 1.0 mole sample of gas that initially had a pressure of 1.01…

A: The final pressure in the atm is determined as follows. P2=767.6 torrP2=767.6 torr760 torr/atm=1.01…

Q: A mixture of gases containing 0.362 moles of oxygen, 1.23 moles of nitrogen, and 0.0234 moles of…

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Q: When heated, mercury (II) oxide (HgO) decomposes to give O2 gas. 2 HgO (s) → 2 Hg (l) + O2 (g) What…

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

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Q: Calculate the density of He gas at 1atm of pressure and 20.00C. Explain (using your calculated…

A: To calculate the density of the He gas at 1 atm pressure and 20.0oC temperature.

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A: Given, mass of unknown gas sample m = 1.25 g            temperature T = 81 °C = 81+ 273 K = 354 K…

Q: For the given reaction, what volume of NO₂ can be produced from 0.80 L of O₂, assuming an excess of…

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Q: A 4.17 g4.17 g sample of NH3NH3 gas and a 4.17 g4.17 g sample of HClHCl gas are mixed in a 2.00…

A: GIVEN: NH3 gas sample =  4.17 g HCl gas sample = 4.17g Volume of flask =2.00 L Temperature=25oC To…

Q: What is the total pressure in mmHg of a gas mixture containing: 0.25 atm of argon, 350 mmHg of He,…

A: Given:Pressure of He = 350 mmHg = 0.4605 atmPressure of Ar = 0.25 atm.Pressure of N2 = 0.47368421…

Q: If 5.0 moles of O2 and 3.0 moles of N2 are placed in a 30.0 L tank at a temperature of 25° C, what…

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Q: Calculate the density of Xenon gas at a pressure of 742 mmHg and a temperature of 450C. The molar…

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A: Given datas ; m = 3.45 g T = 43°C =( 43 + 273 ) K = 316 K P = 1.10 atm  V = 1.85 L Density = mass /…

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Q: A 3.25 g sample of an unknown gas at 37 °C and 1.00 atm is stored in a 1.85 L flask. What is the…

A: Mass of sample = 3.25 g Volume = 1.85 L Temperature = 37 ◦C or 310.15 K Pressure = 1 atm

Q: A 1.95 g sample of an unknown gas at 67 °C and 1.05 atm is stored in a 2.05 L flask. What is the…

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Q: A 1.85 g sample of an unknown gas at 47 °C and 1.00 atm is stored in a 2.85 L flask. What is the…

A: Given: Mass, m =1.85 g Volume , V =2.85 L Pressure, P = 1.00 atm Temperature, T = 47 +273 = 320 K…

Q: 87.23 grams of a gas occupies 45 L at 600 mm Hg and 25 C. What is the molar mass of the gas ?

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A: given, A gas mixture contains sulfur hexafluoride at a pressure of 2.64 atm and diphosphorus…

Q: A 2.65 g sample of an unknown gas at 21 °C and 1.10 atm is stored in a 1.05 L flask. What is 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…

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Q: The total pressure exerted by a mixture of He, Ne, and Ar gases is 2.00 atm. What is the partial…

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Q: A sample of gas contains 0.1700 mol of NH,(g) and 0.2125 mol of O,(g) and occupies a volume of 21.8…

A: Given: The number of moles of NH3 (g) is 0.1700 mol The number of moles of O2 (g) is 0.2125 mol The…