A certain gas has a density of 1.72g/L at STP. What is its molar mass?

Q: Calculate the molar mass of a gas that has a density of 1.428 g/L at STP.

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Q: A given mass of gas occupies a volume of 10.0 L at STP. To what temperature must the gas be heated…

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Q: A gas in a sealed but flexible container has been heated to 42.0°C. At this temperature, it has a…

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Q: A 15.0 g sample of gas occupies 23.2 L at STP. What is the molecular weight of this gas?

A: Weight of gas = w = 15.0 g  Volume of gas = V = 23.2 L  R = 0.082057 L atm K-1mol-1  STP :-…

Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane…

A: Given : Density = 2.30 g/L  Pressure = 0.337 atm

Q: What is the density of the gas in g/L at STP if the molar mass of the gas is 129 g/mol?

A: The molar mass of the gas is = 129 g/mol The density of the gas in g/L at STP is =?

Q: A fire extinguisher releases 1.96 g of an unknown gas that occupies 1.00 L at STP. What is the molar…

A: Given that:                                   Mass of the unknown gas = 1.96 g…

Q: A 2.55 g sample of an unknown gas at 31 ∘C and 1.05 atm is stored in a 2.85 L flask. What is the…

A: First the density is determined by using density formula as shown below,

Q: the identity е

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Q: 0.190 g of a gas occupies 250.0 mL at STP. What is its molecular weight?

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Q: A 2.55 g sample of an unknown gas at 55 °C and 1.05 atm is stored in a 1.05 L flask. What is the…

A: Given values, Mass= 2.55 g Temperature = 55°C = 55+273.15 K = 328.15 K Pressure = 1.05 atm Volume…

Q: A 2.85 g sample of an unknown gas at 61 °C and 1.00 atm is stored in a 2.85 L flask. What is the…

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Q: A 1.65 g sample of an unknown gas at 55 °C and 1.00 atm is stored in a 2.45 L flask. What is the…

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Q: A 1.35 g sample of an unknown gas at 53 °C and 1.05 atm is stored in a 2.75 L flask. What is the…

A: Given: Pressure = 1.05 atm  Volume= 2.75 L  R = gas constant = 0.0821 L atm mol-1K-1 T = temperature…

Q: A gas sample weighing 19.66 g occupies a volume of 7.85 L at STP. What is the molar mass of this gas…

A: The ideal gas equation is given as:

Q: .Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters.…

A: Given data is as follows: The volume of the Cl2 = 9.22 L The pressure of the gas = 1124 torr 1 atm =…

Q: What is the molar mass of Freon-11 gas if its density is 6.13 g/L at STP?

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Q: Cyclopropane, a gas that when mixed with oxygen is used as a general anesthetic, is composed of…

A: The given mass percent is converted into gram. Next determine the number of moles of each element.…

Q: A 3.35 g sample of an unknown gas at 31 °C and 1.00 atm is stored in a 1.85 L flask. What is the…

A: Given data, mass of the sample of an unknown gas=3.35 g Temperature(T)=31℃=(31+273)K =304 K…

Q: What is the molecular weight of a gas if 3.5 g of the gas occupies 2.1 L at STP

A: Given- Weight= 3.5 gram  Volume =2.1 L  Molecular weight of gas=?

Q: The density of a gas is 1.30 g/L at STP. What is it's molar mass?

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Q: A 3.65 g sample of an unknown gas at 61 °C and 1.05 atm is stored in a 2.35 L flask. What is the…

A: We use ideal gas equation to find number of moles and then we use it for molar mass calculation.

Q: At 118oC, the pressure in a 12.0 L flask is 847 mm Hg. How many moles of gas are in the flask?

A: The ideal gas equation is shown below:P V = n R T Where; P = pressure of the gas V= volume of the…

Q: A 2.35 g sample of an unknown gas at 51 °C and 1.05 atm is stored in a 1.35 L flask. What is the…

A: Given, mass of a unknown gas sample (m) = 2.35 g Temperature (T) = 51°C = (51 + 273.15) K = 324.15 K…

Q: A 30.6 g sample of gas occupies 22.414 L at STP. What is the molecular weight of

A: Mass of gas = 30.6 g  Volume = 22.414 L  Molar mass = ?

Q: g/mol. The molecular weight of a gas that has a density of 4.1 g/L at STP is

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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 1.85 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: What is the mass of CH4 in a sample that occupies a volume of 16.5 L at STP?

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Q: If the density of a gas is 2.14g/L at STP, what is the molar mass of this gas?

A: We need to find the molar mass of the given compound. Only density is given as 2.14 g/L at STP.  We…

Q: A 15.0g sample of gas occupies 23.2 L at STP. What is the molecular weight of this gas?

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Q: red in a 2.15L flask. g/

A: Density of the gas = ( mass / volume )  Density = ( 3.35g / 2.15 L )  Density = 1.56 g/L ( Answer )

Q: At 450 mm Hg and 85oC, a sample of carbon monoxide gas occupies a volume of 0.250 L. The gas is…

A: Given, P1 = 450 mm Hg = 0.59 atm P2 = ? V1 = 0.250 Litre V2 = 2.00 Litre T1 = 85 + 273 = 358…

Q: A sample of gas has a mass of 0.565  g g . Its volume is 115  mL mL at a temperature of 86  ∘C ∘C…

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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.