It takes 110. seconds for a sample of carbon dioxide to effuse through a porous plug and 275 seconds for the same volume of an unknown gas to effuse under the same conditions. What is the molar mass of the uriknown gas (in g/mol)? 625 O 44.0 O None of these 110.

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Q: 15. Consider the following reaction. 2 C,H,N,O.(1) → 4 CO (g) + 2 H,0(g) + 2 Ne(g) How many grams of…

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Q: a 750ml flask contains a 1.75 g sampl of CO2 at 22.5 celsius. calculate the pressure of the gas in…

A: Given, volume of the flask V = 750 ml = 0.00075 m3 .Temperature T =22.5 °C = (22.5+273)K = 295.5…

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A: Given: The vapor pressure of water is 17.54 torr. The pressure of wet hydrogen is 747.50 torr.

Q: partial pressure in torr due to nitrogen?

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Q: A chemist isolated a gas in a glass bulb with a volume of 258 mL at a temperature of 22 °C and a…

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Q: Two samples of gas are separated in two rectangular 1.00 -L chambers by a thin metal wall. One…

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Q: mixture

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Q: A sample of argon gas effuses from a containe in 85s. The same amount of an unknown gas requires…

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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…

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Q: vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial…

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Q: At constant temperature the pressure on a 6.0 L sample of a gas is reduced from 1.00 atm to 1140…

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Q: Convert 562.7 mm Hg into atmospheres.

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Q: Oxygen is a product of the decomposition of mercury(II) oxide as shown below. 2 HgO(s) → 2 Hg(l) +…

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Q: partial pressure

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Q: What mass of helium gas is needed to pressurize a 92.0 L tank to 209 atm at 18 °C? What mass of…

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Q: Oxygen gas (O2) is collected over water at 21oC and a total pressure of 1.05 atm. What total volume…

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Q: partial pressure

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Q: 37. What volume of H, gas, measured at 27°C and 700. torr, can be obtained by reacting 5.00 g of…

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A: •partial pressure of any gas = mole fraction × total pressure.

Q: 12. Calculate the molar mass of a gaseous substance if 0.158 g of the gas occupies 31.7 mL at STP.

A: A numerical problem based on mole concept, which is to be accomplished.

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Q: A mixture of N2, O2, and CO2 has a total pressure of 749 torr. In this mixture the partial pressure…

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Q: Oxygen gas (O2) is collected over water at 21oC and a total pressure of 1.05 atm. What total volume…

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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.