The mass of an evacuated 255 mL flask is 143.197 g . The mass of the flask filled with 272 torr of an unknown gas at 35 °C is 144.277 g. Part A Calculate the molar mass of the unknown gas. Express your answer to three significant figures. > VO AEO Molar mass = g/mol Submit Request Answer Provide Feedback

Q: At STP, three 500-ml flasks are filled with N2, 02, and He gas. Which of the following statements is…

A: There are three  states of matter solid, liquid and gas. Solid has higher density than liquid and…

Q: At 35.0°C a sample of a fixed amount of ideal gas occupies 420. ml. at a pressure of 1.25 atm. What…

A:

Q: Chlorine pentafluoride gas is collected at −20.0°C in an evacuated flask with a measured volume of…

A: This can be calculated from ideal gas equation : PV = nRT

Q: A 0.780 mol sample of neon gas occupies a volume of L at STP.

A:

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A:

Q: Assume that all gases obey the Ideal Gas Law. Use separate paper. A leak in a sealed room ( T =…

A:

Q: Part A - Calculating the Molar Mass of a Gas What is the molar mass of an unknown hydrocarbon whose…

A:

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water. This makes it easy to…

A: Given: Temperature = 35.0 oC. Volume of gas = 39.5 mL = 0.0395 L

Q: The rate of diffusion of phosphorous trifluoride was measured and found to be 15.2 mL/min.  Under…

A:

Q: A 5.00 L tank at 12. °C is filled with 14.2 g of chlorine pentafluoride gas and 3.58 g of sulfur…

A:

Q: How long, in minutes, will it take 10.0 ml of H2 gas to effuse through a porous barrier if it has…

A: The time is to be calculated

Q: References Use the References to access important values if needed for this question. A 1.97 gram…

A: Given, Mass of sample = 1.97g. Pressure = 692mmHg = 0.911atm. Volume = 1.15L. Temperature = 56oC =…

Q: STP (standard temperature and pressure) is used as a reference point for the molar volume of an…

A:

Q: Two bulbs are connected by a stopcock. The large bulb, with a volume of 6.00 L, contains nitric…

A: When two reactive compounds are mixed, then they react according to the stoichiometry of the…

Q: The metabolic oxidation of glucose, C, H1206, in our bodies produces CO2, which is expelled from our…

A: The metabolic oxidation of glucose reaction is as follows: C6H12O6(aq) + 6O2(g) → 6CO2(g) + 6H2O(l)…

Q: collected Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: A 8.00 L tank at 2.81 °C is filled with 9.62 g of sulfur hexafluoride gas and 9.34 g of dinitrogen…

A:

Q: A 420.0ml volume of O2 gas is collected over water at 24*C and 750.0 Torr. The gas weighs 0.534g.…

A: The gas(O2) initially has volume of 420.0 mL, temperature of 24 oC(297 K), and pressure of 750.0…

Q: A reaction between liquid reactants takes place at 17.0 °C in a sealed, evacuated vessel with a…

A: Welcome to bartleby !

Q: Calculate the density of a gas at STP if a given volume of the gas effuses through an apparatus in…

A: By using Graham's law of effusion . Rate of effusion of any gas is inversely proportional to square…

Q: The rate of effusion of a particular gas was measured and found to be 24.0 mL/min. Under the same…

A:

Q: Calculate the density of a gas at STP if a given volume of the gas effuses through an apparatus in…

A: Given: Conditions are STP i.e. temperature of 273.15 K and pressure of 1.0 atm. The unknown gas…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A:

Q: 3. Select the correct statement from the following choices that best explain the result recorded in…

A: Since, you have asked multiple questions, we are solving first question for you. For remaining…

Q: Calcium perbromate, Ca(BrO4)2 (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas…

A: Given, molar mass of Ca(BrO4)2 is = 327.9 g. Temperature is = 50°C  Total volume is = 438 mL.…

Q: collected Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch…

A:

Q: I have a container of gas at a pressure of 2.4 atm and a temperature of 343 K with a moveable piston…

A: Given: Final pressure of gas = 4.1 atm. Final volume of gas = 51 L And final temperature of gas =…

Q: Some N₂ gas is mixed with some O₂ gas, and the sketch below shows a representative sample of the…

A: The number of moles is given as the mass of a substance upon its molar mass. The mole fraction of a…

Q: a) AT STP, 0.280 L of a gas weighs 0.400 g. Calculate the molar mass of the gas. M=mRT 0.400g.0.082…

A: a) Given: Volume of gas = 0.280 L Mass of gas = 0.400 g. And conditions are STP.

Q: A The effusion rate of an unknown gas is measured and found to be 35.75 mL/min. Under identical…

A: Given: The rate of effusion of unknown gas = 35.75 mL/min. And the rate of effusion of oxygen gas =…

Q: The effusion rate of an unknown gas is measured and found to be 31.50 mL/min. Under identical…

A: Given : Rate of effusion of unknown gas = 31.50 mL/min. And rate of effusion of O2 gas = 30.50…

Q: Collect five data points for the volumes in Table 2. Volume, nm A Pressure, atm 5.0 46.6 7.5…

A: From the data’s given in the table we can infer that as the volume increases the pressure decreases…

Q: A gas of unknown molecular mass was allowed to effusethrough a small opening under constant-pressure…

A: Since rate is inversely proportional to time. Also the rate is inversely proportional to root of…

Q: The following readings shows gauge pressure, convert them to absolute pressure in kPa if barometer…

A: Density of Mercury = 13600 Kgm3 h = 760 mm of Hg

Q: In the fermentation of glucose (wine making), 740 mL of CO2 gas was produced at 38 °Č and 1.15 atm…

A: Ideal gas equation: PV = nRT     ; n = constant P1 x V1 x 1/T1 = P2 x V2 x 1/T2   1.15 x 760 mmHg x…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A:

Q: A chemical compound is found to contain 24.77% carbon, 73.15% chlorine and 2.08% hydrogen. A 5.553 g…

A: Given: A chemical compound is found to contain : 24.77% carbon, 73.15% chlorine and 2.08% hydrogen.…

Q: A child's ballon containing 6.0L of helium gas at sea level is released and floats away into the…

A: Assuming helium a perfect gas, it will follow universal gas law.

Q: Find the mistake. A stud answer is incorrect. Review their work and find the mistake the student…

A: According to gas law PV = nRT, where n= no. Of moles, R= gas constant, T= ideal temperature (in…

Q: please see attached

A: The volume of a sample argon gas is calculated as,

Q: SA Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at…

A: Given volume of gas = 89.2 ml = 0.0892 L  Temperature = 50.0°C = 323 K  Let pressure be 1 atm of the…

Q: STP (standard temperature and pressure) is used as a reference point for the molar volume of an…

A: Given the molar volume at STP = 22.4 L/mol Required conversion factor is: 1 mol = 22.4 L

Q: The partial pressure of the hydrogen gas collected is 0.928 bar. If the total volume of gas…

A: Given: Partial pressure of H2 gas collected = 0.928 bar. And volume of gas collected = 726 mL =…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Ideal gas equation : PV= nRT

Q: A gas exerts a pressure of 3 kPa on walls of container 1. When container 1 is emptied into a…

A:

Q: At STP a sample of gas with a mass of 28.9 grams occupies 12.3 L. What is the molar mass of this…

A: At STP,  Temperature (T) = 273.15 K Pressure (P) = 1 atm Mass of gas (m) = 28.9 g Volume (V) = 12.3…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Here we have to calculate mass of the CO formed-

Q: An aqueous solution of ammonium nitrite, NH4NO2, decomposes when heated to give off nitrogen, N2.…

A: Given: Reaction : NH4NO2(s)  ➜  2 H2O(g)  +  N2(g) volume of N2 gas = 4.25 dm3 = 4.25 L pressure of…

Q: The partial pressure of the hydrogen gas collected is 0.928 bar. If the total volume of gas…

A:

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Density of oxygen 1.429 kg/m3 that is 0.001429 g/cc. Oxygen is there in 40.5 ml volume, means 40.5…