A canister containing 8g of helium gas (atomic mass 4.0 u) was used to fill up party balloons. When the canister was full, the pressure in the gas was 3 atmospheres and its temperature was 27o C. After filling the balloons, the pressure was seen to have dropped to 2 atmospheres and the temperature dropped to 17oC. Exactly how many grams of helium gas were used to fill the balloons?

Q: A tank was filled with 12 g of oxygen (O2), 73 g of nitrogen (N2) and 4 g of carbon dioxide(CO2). At…

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Q: Fe(s) + H2SO(aq) → FeS0.(aq) + H2(g) The volume of the balloon was 4.8 x10° L. What mass of Fe was…

A: Equation can be written as: Fe(s)+H2SO4→FeSO4(aq)+H2(g) Molar mass of Fe = 56 g/mol H2 = Molar mass…

Q: 5.49 The maximum safe pressure hata sel can hold is 3.50 atm. If thbe vessel contains 0.410 mole of…

A: Given, Volume = 4.00 L Pressure = 3.50 atm Moles of gas = 0.410 moles Temperature = ?

Q: A syringe containing 1.73 mL of oxygen gas is cooled from 96.7 ∘C to 0.5 ∘C. What is the final…

A: The ideal gas expression involves main three factors which are pressure (P), temperature (T) and…

Q: The major constituents of the atmosphere are nitrogen, N2, and oxygen, O2. Dry atmospheric air at a…

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Q: O GASES Calculating mole fraction in a gas mixture A 5.00 L tank at 6.1 °C is filled with 3.82 g of…

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Q: For many purposes we can treat nitrogen (N2) as an ideal gas at temperatures above its boiling point…

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Q: To identify a diatomic gas (X2X2), a researcher carried out the following experiment: She weighed an…

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Q: Solid ammonium chloride, NH4Cl, is formed by the reaction of gaseous ammonia, NH3, and hydrogen…

A: Given,Mass of NH3 = 5.28 gMass of HCl = 5.28 gMoles of NH3 and HCl can be calculated as:

Q: Consider the reaction for the production of NO2 from NO:2 NO( g) + O2( g) → 2 NO2( g)(a) If 84.8 L…

A: a) Given : The volume of oxygen is 84.8 L. The pressure is 632 mmHg. The temperature is 35∘C  that…

Q: compressed gas cylinder, at 65.5 atm and 23o C, is in a room where a fire occurs. The fire raises…

A: Given: Pressure=65.5 atmInitial temperature(T1)=23oC                                =(23+273) K…

Q: A gas is heated from 262.6 Kelvin to 49.4 ∘∘C and the volume increased from 28.84 liters to 42.91…

A: Initial temperature, T1= 262.6 K Final temperature, T2 = 49.4∘C = 322.55K Initial Volume, V1 = 28.84…

Q: A 1.00 LL flask is filled with 1.45 gg of argon at 25 ∘C∘C. A sample of ethane vapor is added to the…

A: Given, 1.45 g of argon Total pressure is 1.400 atm

Q: Given that a bomb calorimeter has a volume of 1.5 L and a temperature of 25.00°C, what pressure of…

A: The chemical equation of combustion of sucrose is written as: C12H22O11 +12 O2→12CO2+11 H2O

Q: A mixture of CO₂ and Kr weighs 29.6 g and exerts a pressure of 0.895 atm in its container. Since Kr…

A: Given Weight of mixture = 29.6 g Total pressure = 0.895 Pressure due to Kr = 0.295 atm

Q: Aerosol cans carry clear warnings against incineration because of the high pressures that can…

A: Given,  Initial temperature = T1 = 30 ∘C  Final temperature = T2 = 1285 ∘C  Initial pressure = P1 =…

Q: A steel cylinder contains 150.0 moles of argon gas at a temperature of 25°C and a pressure of 8.93 M…

A: Answer:- This question is answered by using the simple concept of ideal gas equation which involves…

Q: Consider the following chemical reaction: C(s)+H2O(g)→CO(g)+H2(g) How many liters of hydrogen gas…

A: Ideal gas law equation is equation which obeys gas laws under all condition of temperature and…

Q: What is the effect of the following on the volume of 1 mol of an ideal gas? (a) The pressure is…

A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…

Q: One way to state Boyle's law is "All other things being equal, the pressure of a gas is inversely…

A: Boyle's law:  According to Boyle’s law, the absolute pressure exerted by a given mass of an ideal…

Q: For many purposes we can treat propane (C₂Hg) as an ideal gas at temperatures above its boiling…

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Q: Consider the reaction of 1.41 g Ca(s) with 107 mL of 0.325 M HBr(aq) according to the following…

A: The reaction taking place is given as, => Ca (s) + HBr (aq) -----> CaBr2 (aq) + H2 (g) Given :…

Q: sample of oxygen gas was collected by displacement of water in gas collection apparatus. The total…

A: Here we have to use Daltons law- Ptotal=Pwater+Poxygen It is given vapor pressure of water is 22.6…

Q: For many purposes we can treat ammonia (NH,) as an ideal gas at temperatures above its boiling point…

A: Given-> T1= -19.0°C = -19.0 + 273 = 254 K T2= 21.0°C = 21.0 + 273 = 294 K P1= 0.29 kpa  Volume in…

Q: For many purposes we can treat propane (C3H8) as an ideal gas at temperatures above its boiling…

A: Given: Initial temperature of gas = 32.0 oC Final temperature of gas = 78.0 oC And the pressure is…

Q: If 56.2 grams of carbonic acid are sealed in a 2.00 L soda bottle at room temperature (298 K) and…

A: recall the given reaction           H2CO3aq→H2Ol+CO2(g) Find  moles of carbonic acid that contain…

Q: A neon sign is made of glass tubing whose inside radius is 1.25 cm and whose length is 5.5 m. If the…

A: Since we know that PV = nRT where P = pressure V = volume of gasn = moles of gasR = 0.0821 T =…

Q: An unknown gas has a density of 1.48 g/L and a molar mass of 68.2 g/mol. You have measured the…

A: For the ideal gas, the temperature pressure and the volume are related by the ideal gas equation.…

Q: Does the volume of a fixed quantity of gas decrease to half its original value whenthe temperature…

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Q: Entonox is an anaesthetic gas containing 50% oxygen and 50% nitrous oxide    (N2O).  (i)  If 200 L…

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Q: (a) A tank contains one mole of oxygen gas at a pressure of 6.30 atm and a temperature of 29.5°C.…

A: a) Given Conditions are as follows: Initial pressure, P1 = 6.30 atm Initial temperature, T1 = 29.5˚C…

Q: The reaction of metallic aluminum with aqueous hydrochloric acid produces hydrogen gas. 2 Al(s) + 6…

A: The balanced reaction taking place is given as,

Q: Consider a gas mixture of nitrogen (N2) and methane (CH4) of total mass 80g. 31.14% of the total…

A: Total pressure of the gas mixture :-         Total pressure exerted by a mixture of ideal gasse…

Q: If pressure is expressed in atmospheres and volume is expressed in liters, PAV has units of Latm…

A: Given,  The energy : 4  L. atm 1atm = 101325 Pa.  1 L = 1 dm3 .

Q: Zinc metal and hydrochloric acid (HCI) react to form hydrogen gas (H₂) according to the following…

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Q: At 250 kpa 309K, a sample of gas has a volume of 4.2 L. How many moles of gas are present?

A: The ideal gas equation is  PV = nRT  P = pressure in kPa V = volume in Litres  n = moles  R = gas…

Q: 4. A sample of CO2 gas fills a volume of 100 ml at 99 kPa and 51°C. Determine the temperature in…

A: Combined gas law equation:- P1V1/T1 = P2V2/T2

Q: To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an…

A: According to the ideal gas law: PV = nRT where P, V, n, R and T represent pressure, volume, number…

Q: A compressed gas cylinder, at 74.5 atm and 23o C, is in a room where a fire occurs. The fire raises…

A: Gay-Lussac’s Law: According to Gay-Lussac’s law, if we increase the temperature of a definite amount…

Q: The volume of 3.3mol of ideal gas is 45.7L at 350K. Calculate its pressure (in atmospheres).

A: The pressure of the gas can be calculated by using the ideal gas equation, which is expressed as…

Q: For many purposes we can treat nitrogen (N₂) as an ideal gas at temperatures above its boiling point…

A: Here, we have to find out whether the volume of a sample of nitrogen gas would increase or decrease…

Q: Consider the reaction of a mixture of NaHCO3 and Ca(HCO3)2 with excess HCl. The net ionic reaction…

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Q: To identify a diatomic gas (X2X2), a researcher carried out the following experiment: She weighed an…

A: Using the ideal gas equation, we can calculate the molar mass of the diatomic gas.

Q: A tank was filled with 11 g of oxygen (O2), 87 g of nitrogen (N2) and 6 g of carbon dioxide(CO2). At…

A: we know, Molar mass of O2 = 32 g/mol Molar mass of N2 = 28.0134 g/mol Molar mass of CO2 = 44.01…

Q: What is the pressure of 1.51 g of nitrogen gas confined to a volume of 0.105 LL at 30 ∘C?

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.