Suppose the CO2 gas evolved by a certain chemical reaction taking place at 50.0°C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 126.mL.   Sketch of a gas-collection apparatus Calculate the mass of CO2 that is in the

Q: 2. 2.07x10-3 mol of an unknown gas effuses through a tiny hole in 217.25 s. Under identical…

A: Rate of effusion :- The number of moles (n) of a gas effused per unit time (t) is called rate of…

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: 2. The form of the Ideal Gas Law that we used in class is pVmRT, where p is absolute pressure, V is…

A: We have pV= mRT, where p is absolute pressure, V is volume, R is the specific gas constant and T is…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: The atmosphere slowly oxidizes hydrocarbons in a number of steps that eventually convert the…

A: At STP- 1 mole gas = 22.4 L   Calculating moles of each gas by using dimensional analysis- 155 mL…

Q: Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: To find out the mass of hydrogen gas collected at 55°C over water given that the total volume of the…

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: Sometimes in lab we collect the gas formed by a chemical reaction over water. This makes it easy to…

A: Given: Temperature = 35.0 oC. Volume of gas = 39.5 mL = 0.0395 L

Q: When excess water is added to a mixture of citric acid and sodium bicarbonate present in a bath…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: Which is a postulate of the kinetic molecular theory of gases? 1 Despite being very small, the…

A: The kinetic molecular theory of gas is a model explaining thermodynamic behaviour of gases.…

Q: 3. A chemist carried out a chemical reaction that produced a gas. It was found that the gas…

A: PV = nRTP=1 atm V= 1500ml =1.5 litre n=Weight Gram molecular weight R =0.0821T = 273 K Gram…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Ideal gas equation,  PV = nRT

Q: Oxygen gas reacts with powdered aluminum according to the following reaction:…

A: The reaction is given below.

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: In the lab students reacted zinc with acid to generate and collect hydrogen gas, according to the…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: An investigator is told that a closed vessel holds a pure rare gas. She measures the density of the…

A: The density of the gas, d = 0.8252 g/L Temperature of the gas, T = 298 K Pressure of the gas, P = 1…

Q: Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: The number of moles of gas can be determined by using ideal gas equation assuming that the reaction…

Q: Consider the formation of chlorine gas, from household bleach (sodium hypochlorite) and hydrochloric…

A: Volume of chlorine gas collected = 4.96 L ~ 4.99 L Answer: Option A. 4.99 L

Q: A laboratory technician forgot what the color coding on some commercial cylinders of gas meant but…

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Q: a) 1.488×10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 81.2 s. Under…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: When excess water is added to a mixture of citric acid and sodium bicarbonate present in a bath…

A: The balanced reaction taking place is given as => C6H8O7 (s) + 3 NaHCO3 (s) + H2O (l) → Na3C6H5O7…

Q: metimes in lab we collect the gas formed by a chemical reaction over water (see sketch right). This…

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Q: A box contains equal amounts of helium, argon, and krypton (all gases) at 25 °C. Using complete…

A: At a particular temperature, all gases have same average kinetic energy. It is the kinetic theory of…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: 67. The hydrogen gas formed in a chemical reaction is collected over water at 30.0 °C at a total…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: Consider the formation of chlorine gas, from household bleach (sodium hypochlorite) and hydrochloric…

A: The given reaction is, NaClO (aq) + 2 HCl (aq) → Cl2(g) + H2O (l) + NaCl (aq) The given parameters…

Q: SA Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at…

A: Given volume of gas = 89.2 ml = 0.0892 L  Temperature = 50.0°C = 323 K  Let pressure be 1 atm of the…

Q: Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through…

A: Given: The volume of O2 effused = 6.15 mL The volume of the unknown gas effused at the same time =…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Ideal gas equation : PV= nRT

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Given: Gas is collected over water  Temperature = 55oC = 55 + 273.15 K = 328.15 K Volume of gas =…

Q: A 1.56 mol sample of O2 gas is confined in a 37.6 liter container at 20.9 °C. If 1.56 mol of H2 gas…

A: Given data : Number of moles of O2 = 1.56 moles Volume = 37.6 L Temperature (T) = 20.9°C = 293.9 K…

Q: There is 2.878 x 10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 98.9…

A: According to Graham's law of diffusion, the rate of diffusion is inversely proportional to the…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Given,  Temperature = T = 40.0 0C  Volume = V = 34.3 mL  Pressure = P = 1 atm   Mass of CO   gas = ?…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Temperature = 35°C or 273 + 35 = 308K Volume of the gas = 48.7mL or 0.0487L Pressure of atomosphere…

Q: Sometimes in Iad we collect the gas formed by a chemical reaction over water (see sketch at right).…

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Q: 10. A 3.00-g sample of a mixture of K½O and BaO is placed in 600.0 cm³ vessel containing SO3 gas at…

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Q: There is 2.878 x 10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 98.9…

A: Effusion is the process by which any gaseous substance is escaped from a large system through a tiny…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A: Here we have to calculate mass of the CO formed-

Q: gas mixture is made by combining 8.8g of each Ar, Ne, and an unknown diatomic gas. At STP, the…

A: The total number of moles of gas present in the mixture can be calculated using molar volume of a…

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

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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.