At a height of 300 km above Earth’s surface, an astronautfinds that the atmospheric pressure is about 10^-8mmHg and thetemperature is 500 K. How many molecules of gas are there per milliliter at this altitude?

Q: White phosphorus melts and then vaporizes at high tempera-ture. The gas effuses at a rate that is…

A: The Scottish physical chemist Thomas Graham gives direct relation between rate of effusion of gas…

Q: Q3 A what is the density, in gll, of carbon dioride at gas 43°C and 392 torr? A Sample of an unknown…

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Q: A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas…

A: Given:Initial Moles of gas = 2.10 Initial Volume  =  46.0 L Leaked Moles = 0.700…

Q: A blimp is filled with 3950 kg of helium at 731 mmHg and 20oC. What is the volume of the blimp under…

A: Given information,   Mass of He = 3950 kg   Pressure = 731 mmHg   Temperature = 200C

Q: Acetylene (CH2(g)) is an important fuel in welding. A sample is produccd in a laboratory by a…

A:

Q: A neon sign is made of glass tubing whose inside diameter is2.5 cm and whose length is 5.5 m. If the…

A: Since we know that PV = nRT  where P = pressure  V = volume of gas n = moles of gas R = 0.0821  T =…

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: A neon sign is made of glass tubing whose inside diameter is2.5 cm and whose length is 5.5 m. If the…

A: Since we know that PV = nRT  where P = pressure  V = volume of gas n = moles of gas R = 0.0821  T =…

Q: 2. A sample of a gas occupies 872 mL at -45°C and a pressure of 665 mm Hg. What is its volume if the…

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Q: A sample of nitrogen gas is 1.05 L at -58 °C and 1 atm. What is the gas volume when it is heated to…

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Q: Calculate the volume of a sample of an ideal gas that contains 3.72 mol at 655 mmHg and 0oC.

A: Given Pressure (P) = 655 mmHg mole (n) = 3.72 mol Temperature = 0°C   standard value R = 0.0821…

Q: What is the density of a sample of nitrogen gas ( N 2 )that exerts a pressure of 5.30 atm in a…

A: According to ideal gas equation  PV = n RT where P represents pressure, V is volume, n is mole, T…

Q: When an evacuated 63.8-mL glass bulb is filled with a gas at 22°C and 747 mmHg, the bulb gains…

A: Given: Formulas that are used in this problem are,

Q: A gaseous hydrogen- and carbon-containing compound is decomposed and found to contain 82.66% carbon…

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Q: A 4.000 L sample of nitrogen gas at 25.00°C and 760.0 mmHg is heated to 500.0°C, with a constant…

A: Initial Pressure ( P1 )        = 760 mmHg Initial Temperature ( T1 ) = 25 ℃…

Q: A physical chemist measuredthe lowest pressure achieved in a laboratory—about1.0 × 1 0 -15 mm Hg.…

A: Considering the given gas is ideal gas. Pressure of the gas = 1.0 x 10 -15 mm Hg Volume of the gas =…

Q: Calculate the density of sulfur hexafluoride gas at 707 torr and 21 degrees C.  Calculate the molar…

A: Given : Case I : Pressure for sulfur hexafluoride = 707 torr Temperature = 21 C Case II : Dansity =…

Q: A 0.271 g sample of He(g) is placed in a balloon at 22.0 °C and a pressure of 754 mm Hg. What is the…

A: This question is based on ideal gas Equation. PV = nRT Where, P - pressure V- Volume n = no of moles…

Q: You have produced 170 g of NHin a 5.0L tank at 400.0 C. What is the total pressure of the gasses?

A: The relationship between temperature, pressure, volume and number of mole is given by ideal gas…

Q: Calculate the density of fluorine gas (in g/L) at 35.0∘∘C and 785mmHg.

A: The question is based on the concept of physical chemistry. We have to calculate density of fluorine…

Q: At what T will a 10.0 L gas at constant pressure be brought to if the same gas originally occupied…

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Q: Neon gas at a pressure of 25 kPa occupies 444 L at 60 °C. What is the pressure of the gas at -73 °C…

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Q: A 0.850-mole sample of nitrous oxide, a gas used as an anesthetic by dentists, has a volume of 20.46…

A: Since, number of moles of gas are constant. So,  P1V1/T1 = P2V2/T2 Given that: P1 = 1.35 atm, V1 =…

Q: has a volume of 100 dms 500 mmlg. at 320 mmtg. prvided temporature is constant- 2 gas hes a volume…

A: NOTE:  “Since you have asked multiple question, we will solve the first question for you. If youwant…

Q: When 4.67 L of carbon dioxide at 485.6 mmHg and 25.0 ℃ is heated to 475.0 ℃ and converted to 754.2…

A: Given P1 = 485.6 mmHg V1 = 4.67 L T1 = 25°C P2 = 754.2 mmHg V2 = ? T2 = 475°C

Q: B. In the following graphs, velocity represents the molecular speed, Velocity (m/s) (i) If the plot…

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

Q: At constant pressure, the mean free path 1l2 of a gas moleculeis directly proportional to…

A: Let the mean free path be ƛ, temperature be T, Pressure be P and diameter be d. At constant…

Q: An anesthetic gas contains 64.81% carbon, 13.60% hydro-gen, and 21.59% oxygen, by mass. If 2.00 L of…

A: Ideal gas equation It is also known as general gas equation. PV=nRT P=pressure V=volume n=no of…

Q: A gas composed of chlorine and oxygen has a density of 2.875 g/L at 751.5 mm Hg and 11°C. What is…

A: The relationship between density , pressure , temperature and molar mass of the gas is given by the…

Q: A helium balloon at sea level has a volume of 2.10 L at 0.998 atm and 36.1oC. If it is released and…

A: We have given that  Initial volume of He gas= V1 = 2.10L Initial pressure of He gas=P1 = 0.998atm…

Q: An experiment requires 5.56 dm3 of carbon monoxide, CO, at 15.3ºC and 1.00 atm. What is the volume…

A: Given: Initial volume of CO (V1) = 5.56 dm3 = 5.56 L Initial temperature of CO gas (T1) = 15.3 ºC =…

Q: An anaesthetic gas contains 64.81% carbon, 13.60% hydrogen, and 21.59 % oxygen by mass, If 2.00 L of…

A: Given: Volume of gas = 2.0 L Temperature = 25 oC Pressure = 0.420 atm mass =2.57 g % of carbon =…

Q: An “empty” spray can contains residual propellant gas that has a pressure of 772 torr at 23oC.…

A: Given Information- initial pressure P1 = 772 torr initial temperature T1 = 23o C = 296.15 K final…

Q: A 1.40-L flask is filled with propane gas (C3H8), at 1.00 atm and -15.0°C. What is the mass of the…

A: P V = n R T  where  P = Pressure of gas =  1 atm  V = volume of gas =  1.4 L  R = universal gas…

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: Consider the following graph. (a) If curves A and B refer totwo different gases, He and O2, at the…

A: a) Since we know that the molecular speed of the gases is inversely proportional to the square root…

Q: A gas composed of chlorine and oxygen has a density of 2.875 g/L at 752.0 mm Hg and 11°C. What is…

A: Interpretation- To determine the molecular formula of the gas when  gas composed chlorine and oxygen…

Q: A sample of dry gas weighing 3.1134 grams is found to occupy 3.650 L at 22.0°C and 740.0 mmHg. How…

A: We have to predict the moles of the gas .

Q: A weather balloon containing 600. L of He is released nearthe equator at 1.01 atm and 305 K. It…

A: The ideal gas equation is given as- PV= nRT      (Equation-1) where, P is the pressure of the gas V…

Q: A sample of a gas has a mass of 0.293 g and a pressure of 600.0 mm Hg at 14.0 °C in a 100.0…

A: Given:  Mass of Gas = 0.293g Pressure = 600.0 mmHg Temperature = 14.0o C Volume= 100.0 mL To…

Q: A balloon will burst at a volume of 2.69 L. If it's partially filled at 15.2ºC and 69 cm Hg to…

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Q: When 10.33 g of neon is combined in a 20 L container at 99.8oC with 8.24 g of argon, what is the…

A: The molar mass of Neon = 20g/mol The molar mass of Argon = 40g/mol  Total Volume = 20L  T = 99.8oC =…

Q: If a sample of oxygen gas occupies 50.0 mL at -30 °C and 650 mmHg, what is the volume at 30 °C and…

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Q: 2. 3 moles of hydrogen occupy a volume of 67.20 L, at standard temperature and pressure (STP, O °C…

A: The number of moles of Hydrogen gas = 3 moles. Molar mass of hydrogen = 1g/mol. Pressure = 760 mmHg…

Q: A 2.00 L flask is filled with propane gas(C3H8) at 1.00 atm and -15.0 o C. What is the mass of…

A: Pressure , P = 1.00 atm Temperature, T = -15oC = 273 - 15 = 258 K  Volume, V = 2.00 L Universal Gas…

Q: The mass of 3 liter of a gas at 800 torr and 500 Kelvin is 1.25 gram s. Calculate the m…

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Q: A 3.8 L sample of gas at 1.0 atm and 20 degree C is heated to 83 degree C . calculate the gass…

A: Charles's law states that at a constant pressure, the volume of an ideal gas is directly…

Q: In the average adult male, the residual volume (RV) of thelungs, the volume of air remaining after a…

A: (a) The given problem can be solved by using ideal gas equation as;       PV = nRT…

Q: At 24 °C and 745 mmHg, the density of an unknown gas is determined to be 7.76 g/L. What is the molar…

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Q: 6. A 3.60 L sample of carbon monoxide is collected at 55 degrees * C and 0.869 atm. What volume will…

A: Combined gas law is obtained by combining Boyle's law, Charles law and Gay-Lussac's law. Pressure of…

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.