1. Given the following problem, why would you NOT want to use the formula V1 / T1  =  V2  / T2 to solve it? “What pressure would result if 2.25 L of an unknown gas at 767 torr was squeezed to a final volume of 1.00 L?”  By the way, the correct answer is 1730 torr. 10. How do you know that PV=nRT is the correct formula to use to solve the following problem? “What mass of argon gas is needed to fill a 0.500-L container to a pressure of 1.02 atm at a temperature of 34 °C? By the way, the correct answer is 0.809 grams of argon. 3. A student got problem number 10 above wrong.  The student answered 7.30 grams.  What conversion did the student forget to do?

Q: Calcium hydride combines with water according to the equation CaH2(s) + 2H2O(I) | 2H2(g) +…

A: Mole: It is defined as the unit of measurement for the amount of substance in the International…

Q: Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a volume of gas…

A: Answer: Number of moles are extensive property, therefore they are additive, so to solve this…

Q: At what temperature in oC does 0.505 moles of gas occupy a volume of 8.15 Liters at a pressure of…

A: According to ideal gas law's, ratio of product of Pressure and volume to the product of temperature…

Q: L under these conditions. If 3.67 mol of a gas occupies 57.9 L at 38.8°C and 785 torr, 5.49 mol of…

A: Under the same condition (pressure and temperature), the volume of gas is proportional to the number…

Q: If I contain 3.8 moles of gas in a container with a volume of 90.7 liters and at a temperature of…

A: given moles = 3.8  volume = 90.7 L Temperature = 432 K

Q: At what temperature will the volume of a gas at 0°c double itself, pressure remaining constant?

A:

Q: If I have 2.4 moles of gas held at a temperature of 97 degrees celcius and in a container with a…

A:

Q: N2O4 is very unstable, and readily undergoes the following reaction at high concentrations:  N2O4(g)…

A:

Q: has

A: According to this law, at constant temperature volume is inversely proportional to the pressure…

Q: A rigid plastic container holds 35.34 g of propane gas (C3H8) at a pressure of 927.4 torr. What is…

A: The ideal gas equation is given by:-                                             PV= nRT…

Q: A 2.50 g sample of an unknown gas occupies 875 mL at 685 mm Hg and 35 degrees Celcius. What is the…

A: Given: mass of gas = 2.50 g Volume of gas = 875 mL = 0.875 L pressure of gas = 685 mmHg = 0.9013 atm…

Q: A sample of nitrogen gas is confined to a 14.0 L container at 375 torr and 37.0 degrees Celsius. How…

A:

Q: pressure in Torr of a mixture

A:

Q: partial pressures

A: According to Dalton's law,  Total pressure exerted by gas mixture = the sum of partial pressure of…

Q: A gaseous mixture of O2O2 and N2N2 contains 40.8 %% nitrogen by mass. What is the partial pressure…

A:

Q: If 10.0 L of dinitrogen oxide exerts a pressure of 6464 torr at 100°C. What is the number of moles…

A: The objective of the question is to find the number of moles of dinitrogen oxide gas given the…

Q: A gas constant temperature occupies a volume of 6.41 L and exerts a pressure of 801 torr. What…

A: Given information,      Initial pressure 801 torr = 1.054 atm      Initial volume is  6.41 L.…

Q: A sample of 0.456 moles of N2 gas is confined to a container at 365 torr and 34.0°C. What is the…

A: Given : Moles of N2 = 0.456 moles Pressure = 365 torr Temperature = 34.0°C

Q: What is the ratio of rms (root-mean-square) molecular speed of H2 gas (2 g/mol) at 0°C to rms…

A:

Q: The ratio of the mean speeds for H2 molecules to Ar atoms at 20°C is 2√5 : 1 The expected ratio in…

A: it is square root of mean velocity square of all molecule.

Q: A mixture contains O2 at 700. torr pressure, F2 at 900. torr pressure, and Cl2 at 400. torr…

A: Given that, Pressure of O2=700 torr pressure of F2=900 torr pressure of Cl2=400torr then,

Q: Determine the volume of H2S (in L) at 373 K and 1.752 atm needed to produce 55.54 g of S. Assume…

A: First, we calculate the number of moles of the Sulphur atom with the help of weight and molar mass.…

Q: Container A holds 762 mL762 mL of an ideal gas at 2.30 atm.2.30 atm. Container B holds 159 mL159 mL…

A: By using Daltons law we can find total resulting pressure of Mixing.

Q: What volume (in L) will 4.98*1023 molecules of O2 gas occupy at 54.4 ∘C∘C and 795. torr?

A: Given  Molecule of O2    = 4.98 × 1023 molecule Temperature ( T ) = 54.4 ℃…

Q: A chemist combines 11.8 L N2 gas, 33.9 L O2 gas, and 16.5 L Br2 gas in a reaction vessel at STP. The…

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

Q: A sample of a gas is in a sealed container. The pressure of the gas is 615 torr , and the…

A: Given data, P1 = 615 torr T1 = 5∘C = 278.15 K T2 = 73∘C = 346.15 K To calculate the new pressure.

Q: A sample of a gas is in a sealed container. The pressure of the gas is 765 torr, and the temperature…

A: Here,A sample of a gas is in a sealed container contains a pressure of 765 torr at a temperature of…

Q: A sample of He occupies a volume of 322 mL at 149.2 kPa. What volume in ml would the gas occupy if…

A: Boyle's gas law states that pressure of gas is inversely proportional to the volume of gas.

Q: How many moles of an ideal gas are in a 1,686.5 mL container at 25.2°C and 826.1 torr?

A: An ideal gas is a conceptual gaseous substance whose behaviour is fully defined by the ideal gas law…

Q: . If 0.545 grams of potassium reacts with an excess amount of water, what volume of H2 gas will be…

A:

Q: Consider a reaction vessel of fixed volume containing 24.78 grams of nitrogen gas and 12.388 grams…

A: Answer: Final Pressure = 0.755 atm and Final volume = 40.3 L

Q: At what temperature will a 4.0 g sample of neon gas exert a pressure of 507 torr in a 6.0 L…

A: Solution: The ideal gas law is, where, P =the pressure of gas. V= volume of the gas n = number of…

Q: What volume, in mL, would 1.00 grams of N2(g) occupy at a temperature of 18.5 oC and a pressure of…

A: To calculate the Volume required by N2 (g) , we would use Ideal gas equation.  PV = nRT

Q: Nitrogen and oxygen gases react to form dinitrogen trioxide gas. 2 N2(g) + 3 O2(g)  2 N2O3(g) At a…

A: 2N2(g) + 3O2(g) → 2 N2O3(g) Given that 2.8 L of N2 reacts with 4.2 L of O2.

Q: The initial conditions of a sample of gas are 319 K, 3.087 L, and 591 torr. What is the final…

A:

Q: The pressure of a sample of gas is measured at sea level with an open-end mercury manometer.…

A:

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…

A:

Q: sample of He occupies a volume of 213 mL at 132.3 kPa. What volume in ml would the gas occupy if the…

A:

Q: If 150.00mL of N2 gas was collected at 760 torr, what is the new volme of the gas when the pressure…

A: We can use Boyle's law to solve for the new volume of the gas.Boyle's law states that at constant…

Q: A mixture of helium and neon gases has a density of 0.240 g/L at 41.0°C and 382 torr. Find the mole…

A:

Q: What is the volume of a sample of gas at STP if it initially occupies 2.5 liters at 709 torr and…

A: Volume of 1 mol of any gas at STP = 22.4 L

Q: A sample of H 2 gas occupies a volume of 2.25 L at a pressure of 628 mm Hg and a temperature of…

A: The given data contains, Volume V1 = 2.25 L Pressure P1 = 628 mm Hg. Temperature T1 =308.15 Pressure…

Q: Let's say the following four gases are at a temperature of 25 degrees Celsius. N2, He, F2, Ar If the…

A: The average speed of gases: The speed of a gas particle depends on the temperature of the gas and…

Q: If a mass of nitrogen gas occupies a volume of 4 liters at 720 torr, what pressure will this same…

A: Given P1 = 720 torr V1 = 4 litre P2 = ? V2 = 3.9 litre

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.