A gas occupies a volume 2.51 L and 26°C is adjusted to a new volume of 1.21 L at standard temperature and pressure, STP (1 atm and 273 K). What is the initial pressure of this gas in mmHg?

Q: A flask weighs 50.1305g when clean, dry, evacuated, 150.2410g when filled with water (density =…

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Q: Calculate the change in volume of a 3.26 L sample of Argon, at 0.999 atm, that is heated from 22 oC…

A: Given data, Initial volume(V1)=3.26LInitial pressure(P1)=0.999atmInitial…

Q: What mass of neon gas is required to fill a 5.00-L container to a pressure of 1.02 atm at 25 C?

A: Given that,      Volume of container, V = 5.00 L     Pressure of neon gas, P  = 1.02 atm…

Q: A gas mixture contains O2, N2, and Ar at partial pressures of 125, 175, and 225 mm Hg, respectively.…

A: Given details, At partial pressures, P(O2)=125 mm HgP(N2)=175 mm HgP(Ar)=225 mm Hg Then, the total…

Q: A sample of neon with a molar mass of 20.18g/mol has a volume  of 2.00L under a pressure  of 1.10…

A: According to ideal gas law, Assuming amount of substance and R constant the final and initial…

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

A: The number of moles of oxygen gas can be calculated as follows-

Q: In the fermentation of glucose (wine making), 760 ml of CO2 gas was produced at 65O mmHg. What is…

A: At STP  Pressure= 760 mmHg and Expression used for calculation is P1V1= P2V2

Q: A sample of gas of mass 2.41 g occupies a volume of 480 mL  at 27 oC  and 0.14 atm pressure. What is…

A: Given information: mass = 2.41 g volume = 480 mL  Temperature = 27oC = 27+273.15 = 300.15 K…

Q: A sample of hydrogen gas at 282 K experiences a change in volume from 3.79 L to 3.65 L. If its new…

A: Recall the following expression          P1V1T1=P2V2T2Here initial pressure of hydrogen gas is P1atm…

Q: If 6.90 L of gaseous ethanol reacts with 17.2 L O2, what is the maximum volume of gaseous carbon…

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Q: When fully inflated, a hot-air balloon has a volume of 1.6 X 105 L at an average temperature of 375…

A: Given that volume of hot-air balloon, y =1.6×105 L Pressure, P = 0.975 atm Temperature, T = 375 K…

Q: Calculate the molar mass of a gas that has a density of 1.70 g/L at STP

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Q: Calculate the number of grams of oxygen gas represented by a sample of a pure gas at 27oC, 715 mmHg,…

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Q: A sample of argon gas at standard pressure occupies 1000 ml. At constant temperature, what volume…

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Q: A compressed gas cylinder of CO2 gas has a volume of 23.5 L at room temperature (25C) and a pressure…

A: Given, volume of CO2 = 23.5 L Temperature  = 25°C = (273+25) = 298 K Pressure = 650 KPa  = 650/101 =…

Q: 2. A sample of gas occupies a volume of 10.5 L at 700 mmHg and 100°C. What would the new pressure…

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Q: What is the final pressure (expressed in atm) of a 3.05 L system initially at 724 mmHg and 298K  and…

A: Introduction :  We have to calculate final pressure of gas .

Q: A sample of argon gas occupies a volume of 866 mL at 28°C. What volume will the gas occupy at 50.7°C…

A: Answer: 931.3 mL volume occupy at 50.7°C

Q: What would be the molar mass of a gas for which 2.43 x 10-2g occupies a volume of 7.68 mL at STP?

A: Given that, volume of gas at STP, V = 7.68 mL = 0.00768 L Mass of gas at STP, m = 2.43×10-2 g Molar…

Q: A sample of argon gas occupies a volume of 0.065 m at 101.3 kPa and 25.0°C.What volume would the…

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Q: 11 - Calculate the density of CO2 gas at 27°C and 380 mmHg pressure.

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Q: A sample of a certain gas has a volume of 452 mL at 711 mm Hg and 26 °C. What would be the volume of…

A: Given: Volume V1= 452 mL Pressure P1 = 711mmHg= 711/760= 0.935 atm Temperature T1 = 26oC= 26+ 273 =…

Q: A gas occupies a volume 1.27 L and 25 Celsius is adjusted to new volume of 1.02 L at standard…

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Q: The partial pressure of fluorine gas in a 2.00 L container is 0.85 atm while the partial pressure in…

A: The equation which is related to "P" (pressure in atm), "V" (volume in liter), "n" (moles), "R" (gas…

Q: The partial pressures of CH 4, N 2, and O 2 in a sample of gas were found to be 135 mmHg, 508 mmHg,…

A: Given : Partial pressure of CH4 = 135 mm Hg Partial pressure of N2 = 508 mm Hg And partial pressure…

Q: A gas has the following elemental composition: C = 82.7%, H = 17.3% in mass. At stp (room…

A: Given, C = 82.7 % H = 17.3 %  Temperature = 0°C = 273 K Pressure = 760 mmHg = 1 atm Density = 2.496…

Q: What is the molecular weight of the gas?

A: Ideal gas equation :-  PV = nRT  P is the pressure of gas  V is the volume occupied by gas  n is the…

Q: If a gaseous mixture is made by combining 1.16 g Ar and 2.45 g Kr in an evacuated 2.50 L container…

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Q: A gas originally at 25oC and 1.50 atm pressure in a 2.3 liter container is allowed to expand until…

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Q: In a combustion reaction, what mass of oxygen gas is needed to react with 25.0 mL of C4H10 gas,…

A: Given :-  Volume of C4H10 gas at STP = 25.0 mL  To calculate :-  Mass of O2 (in grams)

Q: When a supply of hydrogen gas is held in a 4-liter container at 320K, it exerts a pressure of 800…

A: For the phase change of the ideal gas the temperature, pressure, and volume of the initial state and…

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

A: Given information:Volume = 12.8 LPartial pressure of chlorine = 143 mmHgPressure = 605.6…

Q: The volume of gas in a container was originally 3.24L, while at standard pressure, 1.00atm. What…

A: Given information: V1 = 3.24 L P1 = 1.00 atm P2 = 1.20 atm

Q: If standard atmospheric pressure is 14.7ln/in^2, calculate what a pressure of 1.72lb/in^2 would be…

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Q: What is the density of a sample of argon gas at 51 ∘C∘C and 871 mmHgmmHg?

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Q: 2. A sample of gas at 245°C and a pressure of 2.5 atm occupies a volume of 12.3 L. What volume would…

A: Answer :-  2. 16.2 L  At STP the gas occupy = 16.2 L volume…

Q: What pressure permits 25.0 cm3 of neon at 735 mmHg to expand to a volume of 40.0 cm3?

A: The initial volume of neon, V1=25.0 cm3 The initial pressure of neon, P1=735 mmHg The final volume…

Q: What is the mass (in g) of a 28.2 L sample of carbon dioxide gas at a temperature of 30.0 oC and a…

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Q: Consider a gas of volume 250 mL and a temperature of 29°C. What is the volume of this sample if the…

A: Consider a gas of volume 250 mL and a temperature of 29°C. The volume of this sample is to be…

Q: The molecular weight of a gas that has a density of 6.75 g/L at STP is __________ g/mol.

A: At stp pressure is one atm

Q: What pressure (atm) is needed to confine an ideal gas to 167.0 L after it has expanded from 35.0 L…

A: The ideal gas equation is given as:  PV = nRTwhere, P = PressureV = Volumen = Number of moles R =…

Q: A student adds 3.00 g of dry ice (solid CO2) to an empty balloon. What will be the volume of the…

A: Given : Mass of dry ice i.e CO2 = 3.00 g And the condition is STP i.e standard temperature of 273 K…

Q: From data gathered by Voyager 1, scientists have estimatedthe composition of the atmosphere of…

A: Given information: Total pressure = 1220 torr Percent of nitrogen = 82% Percent of argon = 12%…

Q: A sample of oxygen gas at 310 K and 1.74 atm occupies a volume of 1.91 L. If the gas is allowed to…

A: According to gas laws, PV = nRT, Where P = Pressure, V = volume, T = temperature, n = no. of moles,…

Q: Ammonia gas occupies the volume of 450. mL at a pressure of 720. mmHg. What would be the volume it…

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Q: What is the pressure exerted by 1.47 g Kr gas at 20.0 °C in a 560-mL flask?

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Q: A substance containing only carbon and hydrogen is analyzed and found to contain 85.7% carbon by…

A: Density of compound at STP = 1.87 g/Li.e. 1 L of compound weighs 1.87 g1 mol of compound at STP =…

Q: If 425 L of a gas at 1.00 atm and 25° C is compressed into a 35.0 L tank at the same temperature,…

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Q: In an experiment, 175 mL of nitrogen gas was collected over water at 23.5 oC and 757 mmHg. What mass…

A: Given,175 mL of nitrogen gas was collected over water at 23.5oC and 757 mmHg.The vapour pressure 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.