Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out the mass of helium in a birthday balloon, a student transferred the helium to a fixed 1.50 L vessel at 25.0 °C and found the pressure to be 3.04 atm. What mass of helium is in the balloon in grams?

Q: A mixture of xenon and helium gases, in a 6.98 L flask at 22 °C, contains 20.2 grams of xenon and…

A: Generally in a mixture of gases two or more gases each of the constituent gas has its own partial…

Q: A mixture of carbon dioxide and helium gases, in a 7.15 L flask at 50 °C, contains 13.4 grams of…

A: We can use ideal gas equation to calculate the partial pressure of each gas. The ideal gas equation…

Q: A 1.59 g sample of a silicon-fluorine compound is determined to be 26.99% silicon by mass at 27.0…

A: m=RT/PV = ((2.60)(.0821)(300))/((1.50)(.250)) = 170.7 Mol wt=170.7 33.01 %Si -100 = 66.99%F 33.01g…

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

A: Given: Volume = 1.00 L = 0.001 m3 Temperature =27oC = 27+273K = 300 K Pressure= 2.00 x 10-6 atm…

Q: A 8.75 L container holds a mixture of two gases at 49 °C. The partial pressures of gas A and gas B,…

A: Daltons law of partial pressures: P total = PA + PB + Pc Total pressure by mixture of gases equals…

Q: A sealed canister holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of…

A: According to Dalton's law of partial pressures, the total pressure in a system is estimated by the…

Q: A mixture of oxygen and neon gases, in a 7.03 L flask at 44 °C, contains 1.91 grams of oxygen and…

A: Given that : Volume of flask (V) = 7.03 L Temperature (T) = 44°C = 317 K Mass of Oxygen = 1.91 g…

Q: 9. Within a balloon, there are three types of gases. The first gas, NH, is 5.7 the second gas, CH.,…

A: First we will calculate mole fraction of each gas , and then by multiplying it with total pressure…

Q: A mixture of methane and neon gases, in a 5.79 L flask at 55 °C, contains 4.14 grams of methane and…

A: Given  Volume ( V ) = 5.79 Liter  Temperature ( T )  = 55 ℃                               = ( 55 +…

Q: A 9.80 L container holds a mixture of two gases at 51 °C. The partial pressures of gas A and gas B,…

A: According to Dalton’s law of partial pressure, in a gaseous mixture, the partial pressure of a…

Q: A mixture of oxygen and neon gases, in a 9.80 L flask at 59 °C, contains 15.3 grams of oxygen and…

A:

Q: A mixture of hydrogen and helium gases, in a 5.17 L flask at 36 °C, contains 0.390 grams of hydrogen…

A: Given, Volume of the flask (V) = 5.17 L Temperature (T) = 36°C = (36 + 273.15) K = 309.15 K Mass of…

Q: A mixture of helium and argon gases is maintained in a 9.15 L flask at a pressure of 3.19 atm and a…

A: Given that Pressure of gas mixture = P = 3.19 atm Volume  = 9.15L Temperature of gas = 38°C =…

Q: 0.9110 grams of an unknown gas was placed into an evacuated 0.500 L container. The temperature was…

A:

Q: 132.0 g of chlorine gas (Cl2) and 24.0 g of helium (He) are mixed in a container with a total…

A: Given,  Mass of. Cl2 = 132 g Molar mass of Cl2 = 71 g/mol Moles = mass/MM     = 132/71   = 1.86 mol…

Q: A sample of air was compressed to a volume of 16.0 L. The temperature was 300.0 K, and the pressure…

A: Number of moles in the sample can be calculated using the Ideal gas equation :…

Q: A sample of hydrogen gas has a volume of 250 mL at a pressure of 101.3 kPa.  If the temperature is…

A:

Q: A balloon containing 0.75 mol of nitrogen gas has a volume of 16.8 L. If the amount of nitrogen in…

A:

Q: A gas cylinder that contains helium has an internal volume of 17.2 L. A pressure gauge attached to…

A: Given :-  Internal volume of cylinder = 17.2 L  Temperature = 21.9°C  Pressure = 1990 psi  To…

Q: The air all around us is a mixture of gasses containing nitrogen, oxygen, carbon dioxide, argon and…

A: Given: The partial pressures of N2, O2, CO2, Ar, H2O vapors as: 1. pN2 = 5.6 atm 2. pO2 = 828 mmHg…

Q: A mixture of 24.0g hydrogen gas, 84.0g of nitrogen gas and 2 moles of oxygen gas are placed in a…

A: The mole fraction of a gas in a mixture is given as: xi=PiPTotalwhere,Pi=Partial pressure of gas i…

Q: 103.0 g of chlorine gas (Cl2) and 23.0 g of helium (He) are mixed in a container with a total…

A:

Q: A balloon that is filled with gas was released at ground level. At ground level where the pressure…

A:

Q: A sample of helium at a pressure of 747 torr and in a volume of 2.09 L was heated from 22.5 to 74.6…

A: Given, P1=747 torrV1=2.09 LT1=22.5°C = 22.5+273 K = 295.5 KP2=?(final pressure)V2=2.81 LT2=74.6°C =…

Q: Hydrogen gas, oxygen gas, and water vapor are collected in eudiometer. The eudiometer contains…

A:

Q: sample of helium gas at a pressure of 640. torr and a temperature of 29.9°C, occupies a volume of…

A: The question is based on the concept of Boyle's law.   it states that for a given amount of gas , at…

Q: Sulfur hexafluoride gas is collected at 29.0 °C in an evacuated flask with a measured volume of 5.0…

A: The temperature, pressure, volume, and mole of the gas are related by the ideal gas equation. The…

Q: 0.9110 grams of an unknown gas was placed into an evacuated 0.500 L container. The temperature was…

A: The ideal gas equation is  PV = nRT  PV = (m/M)RT P = pressure  V = volume  n = moles of gas = mass…

Q: A 7.60 L container holds a mixture of two gasses at 51 degrees celsius. The partial pressures of gas…

A: The ideal gas equation can be written as: Here, P = pressure, V = volume of the container that…

Q: A mixture of carbon dioxide and nitrogen gases, in a 8.55 L flask at 35 °C, contains 16.4 grams of…

A:

Q: A mixture of xenon and argon gases, in a 5.91 L flask at 13 °C, contains 43.3 grams of xenon and…

A: Given : 43.3 grams of xenon3.83 grams of argonVolume  = 5.91 LTemperature is at 13 °C = 286.15KTo…

Q: Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out…

A:

Q: A 8.70 L container holds a mixture of two gases at 33 °C. The partial pressures of gas A and gas B,…

A: Given,Partial pressure of gas A, PA = 0.334 atmPartial pressure of gas B, PB = 0.894 atmMoles of gas…

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.