A sample of gas has a mass of 38.6 mg. Its volume is 228 mL at a temperature of 56 ∘C and a pressure of 869 torr. Find the molar mass of the gas. Express your answer in grams per mole to three significant figures.

Q: If 0.130 mol of N2 gas effuses through a small hole over the course of one hour, calculate the…

A: A question based on effusion, which is to be accomplished.

Q: The volume of a sample of gas measured at 26 ºC and 0.986 atm is 10.50 liters.  What final…

A: from charles law: temperature and volume are directly realted using degrees kelvin. here both…

Q: If 98.5 mol of an ideal gas occupies 29.5L at 37.00 degrees Celsius, what is the pressure of the…

A: According to ideal gas law, PV = nRT where P = pressure in atm V = volume = 29.5 L n = moles 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: Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out…

A:

Q: If a gaseous mixture is made by combining 4.77 g Ar and 2.34 g Kr in an evacuated 2.50 L container…

A: Pi = Xi x P Where, Pi = partial pressure of gas i,             Xi = mole fraction of gas i…

Q: A sample of argon gas at 22.38 °C has a pressure of 94.88 kPa and occupies 28.46 L. How many moles…

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

Q: At 30oC, a gas cylinder containing nitrogen has an internal volume and pressure of 58.5 L and 1.75 *…

A: All matter can be classified as solid, liquid and gases mainly. In these physical states of matter,…

Q: At 741 Torr and 44°C, 7.10 g of a gas occupies a volume of 5.40 L. What is the molar mass of the gas…

A: Given: Pressure is 741 torr Volume is 5.40 L Temperature is 44oC Mass is 7.10 g To find: Molar mass

Q: A sample of argon gas at 55.19 °C has a pressure of 92.56 kPa and occupies 5.71 L. How many moles of…

A: In this question, we want to determine the number of moles of Argon gas  You can see details…

Q: Follow the rules of significant digits. A sample of carbon dioxide gas, CO2, has a volume 2754 mL, a…

A:

Q: Calculate the density of 1.0 mole of ammonia gas at 0.913 atm and 20.0 Celsius.

A: The ideal gas equation in terms of density of the gas (ρ) can be expressed as: Pρ  =  RTMwP  =…

Q: A sample of nitrogen gas has a volume of 478 cm³ and a pressure of 104.1 kPa. What volume would the…

A:

Q: If the density of a gas is 1.2 g/L at 745. Torr and 20 C. What is its molecular mass

A: From Ideal gas equation it is known that------- pV = nRT where p is the pressure , V is the volume…

Q: A sample of gas at 1009.8 mmHg, occupying a volume of 12.49 L, and at a temperature of 26.20 °C is…

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

Q: Consider a sample of argon gas at 20.0ºC, 2167 mm Hg, and 1,450 mL. How many moles of argon are in…

A: Given, Pressure of argon gas (P) = 2167 mmHg = 2.85 atm Volume of argon gas (V) = 1,450 mL = 1.45 L…

Q: A 275-mL flask contains pure helium at a pressure of 746 torr. A second flask with a volume of 475…

A: Total volume after the stopcock is opened. The total volume is 275 ml + 475 ml = 750 ml. Since the…

Q: A sample of ideal gas at room temperature occupies a volume of 15.0 L at a pressure of 752 torr. If…

A: Given, Note: 760 torr = 1 atm Initially: Pressure of a gas (P1) = 752 torr = 0.989 atm Volume of a…

Q: A sample of an unknown gas effuses in 11.1 min. An equal volume of H2 gas, in the same apparatus,…

A: Given: Rate of effusion of unknown gas, r1 = 11.1 min Molar mass of unknown gas = M1gmol Rate of…

Q: A sample of nitrogen gas has a volume of 3.61 Lat 29°C. What volume will it occupy at 289 K if the…

A: Use ideal gas equation at constant pressure and moles.

Q: A gas sample weighing 19.66 g occupies a volume of 7.85 L at STP. What is the molar mass of this gas…

A: The ideal gas equation is given as:

Q: What is the mass of a 3.00 L sample of a gas if this volume was measured at 40oC and 99.2 kPa?…

A: Let the pressure, volume, number of moles and mass of the gas at 40◦C (313K) be P1, V1, x and W1…

Q: b) The absolute temperature of a gas at which 6.79 X 10 ² moles occupies 164 mL at 893 torr. c) The…

A: Solution:      Idea gas equation shows a combined empirical relationship of volume,…

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 sample of ideal gas at room temperature occupies a volume of 40.0 L at a pressure of 442 torr . If…

A:

Q: 0.117 moles of SF6 gas are stored at a temperature of -11.0 ∘∘Celsius and at 480.0 kPa. What is its…

A: Given that: Moles of gas (n) = 0.117moles T = -11.0°C = -11.0°C + 273 = 262K P = 480.0kPa = 480.0kpa…

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

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Q: Oxygen gas reacts with powdered aluminum according to the reaction: 4Al(s) + 302(g)→ 2Al,O3 (s) Part…

A: 4 Al(s) + 3 O2 (g) →2 Al2O3 (s) Number of moles of Al = Amount of Al/ atomic mass of Al…

Q: A sample of fluorine gas occupies 865 mL at 730 mmHg and 170 °C. Part A What is the mass of the…

A:

Q: A sample of gas at 867.5 mmHg, occupying a volume of 13.64 L, and at a temperature of 20.80 °C is…

A: P1 = 867.5mmHg V1 = 13.64L T1 = 20.80oC = 293.95K P2 =  255.09kPa = 1913.33207mmHg T2 = 74.66oC =…

Q: If the temperature of 179.6 L of a gas at 64.9 C falls by 7.2 C, what is the new volume of the gas…

A: We know, at constant pressure; V1 / T1 = V2 / T2 where, V1 = initial volume T1 = initial temperature…

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

A:

Q: At 1.10 atm and 14.23 ∘C, a 2.15g sample of gas occupies a volume of 2.10×103 mL. Calculate the…

A: Given pressure = 1.10 atm volume = 2.10 × 103 ml Temperature = 14.23°C mass = 2.15 g

Q: At 741 torr and 44 °C, 7.10 g of a gas occupy a volume of 5.40 L. What is the molar mass of the gas?

A: Using the ideal gas equation, given the pressure, temperature, mass and volume of the gas, where R…

Q: 238.15L of gas at 841.5 torr and 85.1°C is heated until the temperature reaches 134.1°C.  and the…

A: According to the ideal gas law, the volume of a gas is directly proportional to the number of moles…

Q: A sample of helium gas has a volume of 3.24 L at 25°C. What volume will it occupy at 286K if the…

A:

Q: What is the molar mass of a gas if 0.281 g of the gas occupies a volume of 125 mL at a temperature…

A: Given, amount of gas =0.281 gvolume of gas =125 mL =0.125 Ltemperature =126 °C  =(126+273.15) K…

Q: In a 5.00L container at 25 degrees C, a mixture of gases contains 3.50g of CO, 8.56g of Cl2 and…

A: The partial pressure of any one gas in a mixture of two or more gases is calculated by using the…

Q: 0.601L of gas at 760.4 is compressed to 800. torr, calculate the resulting gas volume in ML at…

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

Q: Consider the following chemical reaction: 2H₂O(1)→ 2H₂(g) + O2(g) What mass of H₂O is required to…

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Q: A gas sample with a mass of 11.2 g exerts a pressure of 1.05 atm at 22.0ºC and a volume of 2.79 L.…

A:

Q: A sample of helium gas has a volume of 3.24 L at 25°C. What volume will it occupy at 286 K if the…

A: Given,  Initial volume of He gas (say V1) = 3.24 L  Initial temperature (say T1) = 25 0C Final…

Q: 1.115×10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 79.9 s. Under…

A:

Q: A mixture of neon and argon gases, at a total pressure of 882 mm Hg, contains 3.46 grams of neon and…

A: Given that, total pressure  (Ptotal) = 882 mmHg Mass of neon = 3.46 g Mass of argon = 2.27 g Partial…

Q: A sample of gas at 1014.9 mmHg, occupying a volume of 13.55 L, and at a temperature of 20.53 °C is…

A: Combined gas law :-  The relationship between pressure , volume and temperature of a gas under two…

Q: A gas at 34C and 1.75 atm has a density of 3.4 g/L. Calculate the molar mass of the gas?

A: The ideal gas equation is given by,                               PV = nRT Where, P is the pressure…

Q: A sample of oxygen gas has a volume of 3.24 L at 31°C. What volume will it occupy at 147°F if the…

A:

Q: A mixture of oxygen and xenon gases, at a total pressure of 882 mm Hg, contains 3.58 grams of oxygen…

A: Given : Mass of oxygen, O2 = 3.58 g And mass of Xenon, Xe = 39.4 g

Q: 2.15g gas occupies 7.50 x 102mL at STP.  What is molar mass of gas?

A:

Q: 冰 26.0 cm What is the pressure of the gas contained in bulb C? (Specify units-- your choice of torr,…

A: We know that, atmospheric pressure will be equal to 760 torr that is Patomspheric 1cm =9.9torr So…

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.