.2 Molecular speed Relative number of molecules

Q: What is the symbol of the gas that effuses 3.1 times as fast as fluorine gas?

A: Given The gas that effuses 3.1 times as fast as fluorine gas

Q: How many grams of helium are needed to fill a balloon to a volume of 5.0L at 22 degrees celsius and…

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Q: 2. A sample of He gas effused 5.3 times faster than an unknown gas, under the same conditions.…

A: Given: The Helium gas with atomic  mass of = 4 u.

Q: an air sample in the  lungs contains oxygen at 93mmHg, nitrogen at 565 mmHg, carbon dioxide at 38…

A: This question can be solved on the prior knowledge of the Daltons Law of Partial Pressure. It states…

Q: 5. What is the pressure that must be exerted on 300 mL of a gas which has been collected at STP So…

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Q: What volume (in L) does a 1.34 g  sample of chlorine gas occupy at SATP?

A: Ideal gas equation is equation which obeys gas law under all conditions of temperature and pressure.

Q: The density of a gas at STP is found to be 2.8 g/L. What is the formula of the gas?

A: Concept:  As we know that density is defined by ratio of mass to the valume. Density = molar mass/…

Q: Suppose the O, gas evolved by a certain chemical reaction taking place at 50.0 Cis collected over…

A: Given: Temperature = 50oC Volume of gas collected in the collection tube = 118 mL To determine: Mass…

Q: The volume of a 3.75 li gas at 0°C will occupy at 50°C and the same pressure is

A: Given  Volume(V1) = 3.75 L Temperature (T1) = 0°C = (0+273) K = 273 K Temperature (T2) = 50°C = (…

Q: What is the relative mean speed of O2 and N2 molecules in a gas at 25 °C?

A: The mean velocity of a gas molecule is directly proportional to the square root of temperature and…

Q: A 0.432 liter sample of oxygen gas is collected at 745 mmHg and 24°C. What volume (in L) will the…

A: Charles's law :-  According to this , at constant pressure the volume of certain mass of a gas is…

Q: If a sample of helium gas has a volume of 120 mL and a pressure of 850 mmHg, what is the new volume…

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Q: When 7.16 g of calcium metal completely reacts with excess water, what is the pressure, in atm, of…

A: Given Weight of calcium=7.16g Volume=2.1L Temperature=306 k To calculate pressure in atm

Q: What gas would effuse at 1.18 at the rate of nitrogen gas?

A: According to Graham’s law, the rate of effusion of a gas is inversely proportional to the square…

Q: What is the density (in g/L) of oxygen gas at 77.0 °C and 700.0 torr?

A: Number of moles = given mass / molar mass   PV = nRT PV =w/m RT P = w/v RT/m P = f * RT/ m f =…

Q: A flask contains 201 mL of Argon at 21oC and 738 mmHg. What is the volume of gas, corrected to…

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Q: A balloon is filled with 2 litters of air at sea level. If the ballon is taken up a mountain so that…

A: Boyel's law gives relationship between pressure and volume of gas at fixed temperature and amount of…

Q: A sample of hydrogen fluoride gas occupies 1250 mL at STP. What is the pressure (mmHg) if the volume…

A: Welcome to bartleby ! Introduction :  We have to calculate pressure in mmhg

Q: Calculate the density of sulfur hexafluoride gas at 703 torr and 21 °C. Express the density in grams…

A: Given, Gas = sulfur hexafluoride pressure =703 torr temperature =21°C=(21+273)K=294 K

Q: A 2.50-L volume of hydrogen measured at –196 °C is warmed to 100 °C. Calculate the volume of the gas…

A: Charles’ Law states that at constant pressure, the volume of the gas is directly proportional to the…

Q: A sample of sulfur hexafluoride gas occupies 9.10 L at 198C. Assuming that the pressure remains…

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Q: A sample of hydrogen fluoride gas occupies 1250 mL at STP. What is the pressure in mm Hg if the…

A: Given details, At STP, V1=1250 mLT1=273KP1=1 atmV2=255 mLT2=573 K To calculate the final pressure.

Q: At what temperature does the rms speed of O2 molecules equal 375 m/s?

A: The rms speed (Urms) of a gas molecule is expressed as shown below: Urms=3RTM…

Q: What is the density of argon gas at a pressure of 312 mmHg and a temperature of 17 °C?

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Q: 1. What are the three assumptions of the kinetic theory as it applies to gases?

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Q: If 0.500 mol of hydrogen gas occupies 5.00 L at 298K, what is the pressure in atmospheres?

A: The gaseous state is the state of matter with least intermolecular force of attraction between…

Q: In 1783, Jacques Charles launched his first balloon filled with hydrogen gas, which he chose because…

A: Given data is as follows: The volume of the balloon = 32000 L The mass of hydrogen gas needed to…

Q: What is the mole fraction of oxygen gas in air (see Table 5.3)? What volume of air contains 10.0 g…

A: Given: Mass of O2=10 g Temperature, T=273 K Pressure, P=1 atm

Q: Given 1 mole of gas in a 1 L container at 0.00 C, What is the pressure?

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Q: Compare to the rate of effusion of N2, the rate of effusion of SF6 is?

A: According to Graham's Law of effusion, the rate of effusion is inversely proportional to the…

Q: 6. Determine the total pressure exerted by a mixture of 2.00 g hydrogen gas and 8.00 g of nitrogen…

A: Dalton's Law of partial pressure: The total pressure exerted by a mixture of gas is equal to the sum…

Q: what is the density of He at STP? why do helium-filled balloons rise in air?

A: At STP : Pressure, P = 1 atm Temperature, T = 273.15 K Molar mass of He, M = 4 g/mol   The density…

Q: What is the molar mass of a gas that effuses 1.25 faster than NF3?

A: According to Graham’s law, if a mixture contains two gases, then the rate of effusion at constant…

Q: A 280ml container of chlorine gas kept at 25C and 746 torr is exposed to 1.25g white phosphorus (P4)…

A: Limiting reagent Limiting reagent is the reactant which is completely consumed during the reaction…

Q: Calculate the density of sulfur hexafluoride gas at 410 torr and 34 °C.

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

Q: What is the density of ammonia gas, , at 35°C and 757 mmHg? Obtain the density in grams per liter.

A: Given: Temperature = 35.0 oC = 308 K Pressure = 757 mmHg = 0.9960 atm Molar mass of ammonia gas…

Q: If a gas sample weighed 3.97 grams occupies 2.768 liters at STP what would be the molas mass of this…

A: Calculation for number of moles:At STP, 1 mole of any gas occupies 22.4 Litre of Volume

Q: 2. There is 1250. cm³ of chlorine gas at 25°C and 90,000 Pascals, what volume will the same gas…

A: Combined gas equation is the combination of Boyle's law, Charles law and Gay lussacs law.

Q: What is the pressure of N2 (g)  in Torr if 0.582 atm of O2 (g) and  965Torr of He(g)  are mixed with…

A: Given , Total pressure = 2250 mmHg Since , 1 torr = 1mmHg  So, Total pressure  = 2250 torr Partial…

Q: Heating potassium chloride KC1O3 yield oxygen gas in potassium chloride what volume in liters of…

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Q: If 12.4L of sulfur trioxide, SO3, decomposes into sulfur dioxide, SO, and oxygen, what volume of…

A: 12.4 L of sulfur Trioxide        Given Reaction :-                SO3 --->SO2 + O2…

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…

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Q: Cyanogen, a highly toxic gas, is 46.2% C and 53.8% N by mass. At 25 °C and 751 torr, 1.05 g of…

A: a) Since PV = nRT  where P = pressure in atm = 751/760 = 0.988 atm                    (since 1 atm =…

Q: What is the mass of 5.00 liters of oxygen gas,O2,at STP?

A: Since at STP  pressure = 1 atm  and temperature = 273.15 K  Using ideal gas equation => PV = nRT…

Q: If 150 grams of vinegar react with eggshell at 641 mmHg and 16°C, what will be the volume of vinegar…

A: This problem can be solved by using the ideal gas equation : PV=nRT where P is the pressure of the…

Q: 2. If 3.0 moles of nitrogen gas are collected in a 35.0 liter container at 20°C, what would be the…

A: As per the bartleby expert guidelines I am allowed to answer one question at a time. As Question 1…

Q: How many moles of helium are needed to fill a balloon to a volume of 8.5 L at 55°C and 682 mmHg?

A:

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.