A 118-mL flask is evacuated and found to have a mass of 97.129 g. When the flask is filled with 768 torr of helium gas at 35 °C, it has a mass of 97.171 g. Was the helium gas pure?

Q: A gaseous mixture contains 0.170 mol of H2, 0.230 mol of N2, and 0.200 mol of Ne. The total pressure…

A: The partial pressure of a gas in a mixture is the product of total pressure and the mole fraction of…

Q: Fe(s) + H2SO(aq) → FeS0.(aq) + H2(g) The volume of the balloon was 4.8 x10° L. What mass of Fe was…

A: Equation can be written as: Fe(s)+H2SO4→FeSO4(aq)+H2(g) Molar mass of Fe = 56 g/mol H2 = Molar mass…

Q: A mixture of helium, nitrogen and oxygen has a total pressure of 755 mm Hg. The partial pressures of…

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Q: A 4.0 liter rigid, indestructible metal can is filled with nitrogen gas at 45 °C to a pressure of…

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Q: A sample of methane gas (CH4) at 15.7 oC is either heated or cooled. The pressure increases from…

A: The relationship between the temperature, pressure, and volume of the initial and final state of an…

Q: A sample of gas contains 8.09 moles at 37.8 °C in a volume of 3.61 L. If 0.530 moles of gas are…

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Q: A gas mixture has partial pressures of 52.55 mmHg H2, 159.74 mmHg N2, and 362.99 mmHg  O2. What is…

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Q: 13. Some 02(g) was collected over water in a volume of 55.3 mL at 20. °C under atmospheric pressure…

A: Consider the given information is as follows; Volume of water (V) = 55.3 mL = 0.0553 L Temperature…

Q: Dinitrogen difluoride gas is collected at 13.0 °C in an evacuated flask with a measured volume of…

A: Given  Temperature ( T ) = 13 ℃                              = ( 13 + 273 ) K…

Q: 1) Convert a pressure of 2.18 atm to kPa. Answer in units of kPa. Convert the pressure of 2.18 atm…

A: Since you asked for multiple questions, we are entitled to solve first question only.

Q: A sample of gas contains 0.1900 mol of HCl(g) and 9.500×10-2 mol of Br2(g) and occupies a volume of…

A: Given that : Number of moles of HCl(g) = 0.1900 mol Number of moles of Br2(g) = 9.500×10-2 mol…

Q: e identity of the gas?

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Q: A sample of helium gas at a pressure of 727 torr and a temperature of 23.8°C, occupies a volume of…

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Q: A 1.00 L flask is filled with 2.00 mol Ar, 2.00 mol H2 and 4.00 mol Kr. Which of the following…

A: Given data, Volume of flask = 1.0L Moles of H2 = 2.00 moles Moles of Ar = 2.00 moles Moles of Kr =…

Q: A 2.42-liter sample of gas was collected over water when the temperature was 24 oC and the…

A: Given that – volume of sample gas = 2.42 L Tempreture = 24°c = 24 + 273 = 297 K Pressure total =…

Q: A sample of nitrogen gas occupies a volume of 7.61 L at 45.0°C and 0.890 atm. If it is desired to…

A: A sample of nitrogen gas occupies a volume of 7.61 L at 45.0 oC and 0.890 atm. Volume of the gas…

Q: (b) A piston at 122.0°C contains a gas that occupies a volume of 2.5 L. To what temperature would…

A: A piston at 122.0°C contains a gas that occupies a volume of 2.5 L. The temperature at that would…

Q: States of Matter = Using the combined gas law For many purposes we can treat butane (C4H10) as an…

A: The objective of the question is to determine if it is possible to change the temperature of butane…

Q: Elemental analysis is performed on an organic liquid with a fishy odor. Vaporization of 255.0 mg of…

A: Here we can apply the gas equation to find the moles of organic compound used. Moles n = PV / RT…

Q: If 4.28 g Ar4.28 g Ar are added to 2.52 atm He2.52 atm He in a 2.00 L cylinder at 27.0 °C, what is…

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Q: If 3.87 g Ar are added to 2.64 atm He in a 2.00 L cylinder at 27.0 °C, what is the total pressure of…

A: The number of moles of argon is calculated as follow 1 mole of argon = 39.95 g X mole of argon =…

Q: The gas of a certain volcano had the following composition in mole percent: 60.0% CO2, 28.0% H2,…

A: To calculate partial pressure of CO2:

Q: partial pressure

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Q: To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an…

A: Using the ideal gas equation, we can calculate the molar mass of the diatomic gas.The ideal gas…

Q: A mixture that's 35.0% N2 and 65.0% O2 by volume has a total pressure of 2500. psi. What is the…

A: To solve this problem we have to use the concept of Dalton Law of Partial Pressure.

Q: A mixture of cyclopropane gas (C3H6) and Oxygen (O2) in a 1.00 to 4.00 mole ratio is used as an…

A: Given that the mole ratio of cyclopropane and oxygen in the mixture is 1:4 respectively. The partial…

Q: If 1.58 g Ar are added to 3.61 atm He in a 2.00 L cylinder at 27.0 °C, what is the total pressure of…

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Q: A student recovered0.398g of THF vapor in a 125 mL flask. Assuming the vapor is an ideal gas with a…

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Q: xenon fluoride can be prepared by heating a mixture of Xe and F2 gases to a high temperature in a…

A: Given: Volume of the container: 0.25 L Pressure = 0.12 atm Temperature= 0.0 °C After addition of…

Q: A sample of gas occupies 121 mL at 22.5 °C; the pressure is 149 mm Hg. What is the pressure of the…

A: The pressure of the gas sample is to be calculated.

Q: The lowest pressure achieved in the laboratory is about 1.0 x 10 ^-15 torr. how many molecules of…

A: Given : Pressure = 1.0 X 10-15 torr And volume of container = 1.0 L Assuming the temperature is same…

Q: Part A Three gases (8.00 g of methane, CH4, 18.0 g of ethane, CH6, and an unknown amount of propane,…

A: mole fraction is the ratio of number of mol of any species and the total number of mols

Q: A fixed amount of gas in a capped syringe at 7 C has a volume of 12.0 mL. After heating the gas in a…

A: Initial temperature T1 = 7 °C = 7 + 273 K = 280 K Initial volume V1 = 12.0 mL Final temperature T2 =…

Q: CO2 was added to a cylinder containing 2.5 atm of O2 to give a total pressure of 4.0 atm of gas.…

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Q: Using Dalton's law of partial pressures, calculate the total pressure of a mixture of three gases,…

A: According to Dalton's law of partial pressures, the total pressure of a mixture of gases is equal to…

Q: A gaseous mixture containing 7.5 mol He and 2.6 mol NO2 has a total pressure of 10.1 atm. What is…

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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.