At 200.0 mL flask of an unknow gas was placed in a hot water bath. The temperature of the bath was found to be 99 degrees C. The pressure of the flask was 733 mm Hg. The flask with the unknown gas in it had a mass of 126.593 g. The same flask weighed 125.623 g when it was empty. Determine the mass of the unknown gas in the flask. Determine the Molar Mass of the unknown gas. Assume that the Ideal Gas Law is obeyed and use R= 0.0821 L atm/mol K.

Q: At a pressure of 1 atm and a temperature of 20oC, dry air has a density of 1.2256 g/L. What is the…

A:

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

A:

Q: 2518-25 General, Settings Help Discussions List > View Topic Gas_Laws Cho 7 Unlocked: Monday,…

A: In the given question we have to calculate temperature after change in pressure and volume of gas,…

Q: A 0.112 g sample of gas occupied 81.8 cm3 at temperature 127 °C and a pressure of 1 atm. Calculate…

A: The ideal gas equation, PV = nRT  and n = mass of the gas (m)/Molar mass of the gas (M) PV = (m/M)…

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: Calculate the pressure exerted for a mixture of two 7.50 g nitrogen (N2) gases, 6.00 g helium (He)…

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

Q: A 3.35 g sample of an unknown gas at 23 C and 1.10 atm is stored in a 3.05 L flask. What is the…

A:

Q: How many grams of iron are needed to completely consume 49.5 L of gas according to the following…

A:

Q: An unknown gas diffuses at a rate of 14.8 mL/s. Under the same conditions of temperature and…

A:

Q: The following data was collected. Find the molar mass of the unknown gas. Mass of syringe, cap and…

A: The mass of syringe, cap and nail (containing vacuum) does not affect the mass of gas because,…

Q: The density of a sample of gas is 1.00 g/L at 745 mmHg and 109°C. What is the molar mass of the gas

A: The ratio of mass per volume of a given substance is called its density. The equation of state of a…

Q: A dusty tank containing 2.23 grams of an unknown gas was found in a cellar. What is the type of gas…

A:

Q: A 12.0 g sample of a gas has a volume of 5.25 L at 29 ∘C and 98 kPa. If 2.6 g of the same gas is…

A: Given, m = 12.0 g V = 5.25 L T = 29 + 273 = 302 K P = 98 kPa Substitute these values in ideal gas…

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

A: Given: Density = 1.79g/mol Pressure = 0.447 atm

Q: 15.00 L vessel containing 5.65 g H2 gas at 27 Celcius is connected by means of a valve to a 6.00 L…

A: Given; Volume (V1 ) of H2  vessel = 15 L Volume (V2 ) of O2 vessel = 6 L Temperature (T) = 300K…

Q: The temperature of a sample of an ideal gas confined in a 2.0L container was raised from 27ºC to…

A:

Q: What volume of oxygen gas is produced

A:

Q: 4. The decomposition of 30.354 g of potassium chlorate yields solid potassium chloride and oxygen…

A: 2KClO3 → 2KCl (s) + 3O2Mass of KClO3= 30.354gT= 27.05°C   = (27.05+273.15)K     = 300.2KP= 1.075…

Q: Consider three identical flasks filled with different gases. Flask A: N2 at 2.00 atm and 0 oC Flask…

A: Given: For three flasks: Temperature=0 oC

Q: In any of the equation forms of the Ideal Gas Law, IGL, pressure must always be in what unit?  a…

A: It totally depends on that the given gas constant is taken in which unit . We should take pressure…

Q: At what temperature does the rms speed of O2 molecules equal 475. m/s?

A:

Q: A perfect gas undergoes isothermal compression, which reduces its volume by 2.20 L. The final…

A:

Q: onsider a 1.53L sample of gaseous SO2 at a pressure of 5.6 x 103 Pa. If the pressure is changed to…

A:

Q: Suppose a 185 gram sample of hydrogen reacts as follows: 2 NO2 (g) + 7 H2 (g) → 2 NH3 (g) + 4 H20(g)…

A: 8.7 ) First we calculate moles of hydrogen gas , then we would use stoichiometry relation to…

Q: a gas weighs 4.25 g and has a volume of 956.0 mL at 665.0 torr and 35.0 °C. What is its molar mass?

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

Q: A 10.9 g sample of a gas has a volume of 5.25 L at 30 ∘C and 107 kPa. If 2.9 g of the same gas is…

A: Given A 10.9 g sample of a gas has a volume of 5.25 L at 30°C and 107 kPai.e. initial amount of gas…

Q: A laboratory technician forgot what the color coding on some commercial cylinders of gas meant but…

A:

Q: If the temperature of a gas confined to such a cylinder is raised from 221°C to 635°C, what is the…

A: Since the cylinder is confined means no change in moles of gas And pressure is also given constant…

Q: We find that a mass of 0.896 g of a gaseous compound, containing only nitrogen and oxygen, occupy a…

A:

Q: An unknown element exists as a diatomic gas and has a density of 3.164 g/l at STP. What is the…

A: using ideal gas equation,  PM = d RT d = density of gas.

Q: A 25.0 L container at 23.0 °C contains 60.54 g Ne and 167.6 g Kr. What is the total pressure of the…

A:

Q: The following reaction is used to generate hydrogen gas in the laboratory. If 243 mL of gas is…

A: First determine the moles of hydrogen produced from given reaction under given conditions.…

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

A:

Q: If the temperature of a gas confined to such a cylinder is raised from 251°C to 536°C, what is the…

A: Gas is considered to be the third state of matter. The behaviour of gases can be well explained…

Q: .) This reaction occurs in large test tube at 32.0 ° C: 2 Al (s) +3 H2SO4 (aq) → 6 H2 (g) + Al2…

A: Reaction:2 Al (s) + 3 H2SO4 (aq) →  6 H2 (g) + Al2(SO4)3 (aq)Use an ideal gas equation to solve for…

Q: Butane, C4H10, is an easily liquefied gaseous fuel. Calculate the density of butane gas at 0.657 atm…

A: Given: Pressure = 0.657 atm. Temperature = 22 oC And compound is C4H10 gas. Molar mass of C4H10 =…

Q: If the temperature of a gas confined to such a cylinder is raised from 245°C to 554°C, what is the…

A:

Q: A chemical reaction occurring in a cylinder equipped with a moveable piston produces 0.641 mol of a…

A:

Q: Three gases (CO2, 02, and N) are trapped in individual bulbs of difterent volumes below. When the…

A:

Q: 10) Iron nail rusts when exposed to oxygen.4Fe(s) + 3 O2(g)2 Fe2O3(s) a)What volume of oxygen gasat…

A:

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 the temperature of a gas confined to such a cylinder is raised from 272°C to 692°C, what is the…

A: At constant pressure, volume of the gas is directly proportional to its temperature. V1/T1 = V2/T2 =…

Q: A sample of fluorine gas occupies a volume of 1550 mL at 690 mm Hg and 155oC.  What is the mass of…

A: The question is based on the concept of ideal gas equation. we have to make use of ideal gas…

Q: 1.26 g/L

A: First in question pressure and temperature both are given so we can assume that given florine gas is…

Q: A box contains equal amounts of helium, argon, and krypton (all gases) at 25 °C. Using complete…

A:

Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases C2HF5 and CH2F2 has…

A: Given: Density of mixture = 1.92 g/L. Pressure of mixture = 0.625 atm. Temperature = 31 oC And the…

Q: A 1.56 mol sample of O2 gas is confined in a 37.6 liter container at 20.9 °C. If 1.56 mol of H2 gas…

A: Given data : Number of moles of O2 = 1.56 moles Volume = 37.6 L Temperature (T) = 20.9°C = 293.9 K…

Q: What volume of hydrogen gas (in L) is produced when 0.243 moles of sodium reacts completely…

A: The question is based on reaction Stoichiometry & ideal gas equation. we have to calculate…

Q: 8) Consider the apparatus pictured below, which consists of two containers separated by a valve.…

A: The ideal gas equation is PV=nRTP=nRTV

Q: At 1.29 atm and 29.54∘C, a 3.14 g sample of gas occupies a volume of 1.70 ×103 mL. Calculate the…

A: Given, P= 1.29 atm  Mass = 3.14 g Volume = 1.70 ×103 mL T = 29.54∘C

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.