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 sample of argon gas at a pressure of 0.752 atm and a temperature of 25.8 °C, occupies a volume of…

A: Given data, Initial pressure (P1) = 0.752 atm Initial volume (V1) = 441 mL Final Pressure (P2) =…

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 sample of gas contains 0.1600 mol of HBr(g) and 0.08000 mol of Cl₂ (g) and occupies a volume of…

A: As per Dalton's law, volume and number of moles are directly proportional to each other.

Q: What is the temperature (in °C) of a 2.00 L sample of neon gas at a pressure of 1520 torr? The…

A: Ideal gases are those gases which follow ideal gas equation. The relation between pressure, volume,…

Q: The volume of a sample of hydrogen gas was decreased from 11.97 L to 5.26 L at constant temperature.…

A: According to ideal gas law  PV = nRT  where P = pressure  V = volume n = moles  R = gas constant  T…

Q: A sample of an ideal gas at 1.00 atm and a volume of 1.91 L was placed in a weighted balloon and…

A: We have given that initial Pressure (P1) = 1 atm Volume (V1) = 1.91 L And after dropping into 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: 10.546 g of a sample containing a mixture of NaHCO3 and Ca(HCO3)2 is mixed with an excess of HCI to…

A:

Q: A sample of sulfur dioxide (1.75 L, 25 °C, 1.56 atm) is mixed with pure oxygen (2.00 L, 35 °C, 1.12…

A: A mixture of gases contain sulfur dioxide and oxygen which leads to the formation of sulfur…

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: After dissolving an unknown tablet in water, the tablet dissolves and liberates a gas. Suppose at 1…

A: Given that:            Volume of gas (V) = 360 mL = 0.360 L               Temperature (T) = 20℃ =…

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

A: a) Moles of H2(9) =0.00206 g2 gmol=0.00103 molb) Moles of O2(9) =0.0811 g32 gmol= 0.00253 molc)…

Q: The volume of a sample of hydrogen gas was decreased from 12.01 L to 5.30 L at constant temperature.…

A:

Q: A mixture of neon and argon gases, in a 7.40L flask at 48 °C, contains 1.63 grams of neon and 11.1…

A: Given :-  mass of Neon = 1.63 g  mass of Argon = 11.1 g  volume = 7.40 L  temperature = 48°C  To be…

Q: The total pressure of a gas mixture in a particular container is 43.2 atm. The flask contains 2.87…

A: total pressure = PT = 43.2 atm  mole of argon = 2.87 mole of chlorine = 7.40 mole of xenon = 15.2…

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 mixture of krypton and hydrogen gases is maintained in a 9.48 L flask at a pressure of 2.25 atm…

A:

Q: A sample of an ideal gas at 1.00 atm and a volume of 1.71 L was placed in a weighted balloon and…

A: GivenInitial pressure= 1 atmFinal pressure = 65.0 atmInitial volume =1.71LTemperature is kept…

Q: what was the volume of the sample?

A: According to the Boyle's Law ; at constant temperature the pressure exerted by an ideal gas is…

Q: Because it is difficult to measure the mass of a sample of a helium, a student transferred the…

A:

Q: If a balloon is filled with 4.56 moles of helium gas and then exposed to a pressure of 0.123 atm at…

A: Given: Moles of He  gas: 4.56 Pressure : 0.123 atm Temperature : 28 oC = 301 K

Q: A mixture of 8.0 g CH4 and 8.0 g Xe is placed in a container and the total pressure is found to be…

A: It is given that 8 g of CH4 and 8 g of Xe are placed in a container and has a total pressure of 0.44…

Q: A sample of an ideal gas at 1.00 atm and a volume of 1.59 L was placed in a weighted balloon and…

A: Given, P1= 1.00 atm V1 = 1.59 L P2 = 80.0 atm V2 = ?

Q: An empty glass flask has a mass of 56.52 g and a volume of 875.0 mL. When the flask is filled with…

A: Ideal gases are hypothetical gases which do have real existence. A gas can behave ideally at low…

Q: A sample of an ideal gas at 1.00 atm and a volume of 1.89 L was placed in a weighted balloon and…

A: We have to use the Boyle's law in order to calculate the final volume as it is given temperature is…

Q: A mixture of neon and argon gases is maintained in a 7.63 L flask at a pressure of 3.55 atm and a…

A:

Q: A student collects 122. mL of hydrogen gas at 23.8 °C. The pressure of the hydrogen gas was…

A:

Q: A gas sample occupying a volume of 87.5 mL at a pressure of 0.887 atm is allowed to expand at…

A: According to Boyle's law, the relation between the volume of the gas and the pressure of the gas are…

Q: A 15.0-L tank is filled with helium gas at a pressure of 1.00 × 102  atm. How many balloons (each…

A: Given data,

Q: reaction

A:

Q: The initial temperature of a 1.00-liter sample of argon is 20.0 degrees celsius. The pressure is…

A: We know that idel gas law by using the equation for ideal gas law we can calculate final…

Q: A mixture of helium and carbon dioxide gases, in a 7.08 L flask at 81 °C, contains 1.17 grams of…

A: First the partial pressure of helium in the flask is calculated.

Q: A student collected a sample of gas in a 0.220 L gas bulb until its pressure reached 0.757 atm at…

A: By applying ideal gas equation we will solve molecular weight of the gas PV=nRT

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.