Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the O2 gas evolved by a certain chemical reaction taking place at 35.0°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 80.0mL. Calculate the mass of O2 that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.   = g

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

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Q: A sample of unknown gas has a mass of 2.85 g and occupies 750 mL at 760 mm Hg and 100 °C. What is…

A: Ideal gases have negligible volume in compare to the volume of the container and molecules of ideal…

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: governed by four variables such as pressure, temperature, volume and molar amount which have…

A: Given:  Volume of Cl2 gas = 6.80 L  Temperature = 41 °C = 314 K  Pressure = 1200 torr  Since 1 atm =…

Q: 60 L tank containing 2.5 mol of CH4 . Initially, when Poutside was 1 atm, there was no leakage. But…

A: Given: Volume of tank = 60 L Initial moles of CH4 = 2.5 mol. Initial pressure of CH4 = 1.0 atm. And…

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: Imagine four clouds of gas that are all held at a temperature of 100 K, but each cloud is made of a…

A: Given chemical species with their molecular masses: Chemical Species Molecular Mass (amu)…

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: Consider separate 1.0 liter gaseous samples of N2, Ar, CH4, and CO2 all at STP... (a) Rank the…

A: The gaseous samples given at STP are N2, Ar, CH4, and CO2.

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

A: We define STP as a temperature of 273.15 K and pressure of exactly 1 atm. Zn reacts with sulphuric…

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

A: Volume of H2 gas, V = 142 mL = 0.142 L (1 L = 1000 mL) Temperature of H2 gas, T = 45.0 °C =…

Q: A 1.92 L flask is filled with 2.52 g of some gas (molar mass 42.100g/mol) at 23.1°C. A different…

A: Given: Volume , V = 1.92 L Temperature = 23.1°C = 296.25K No. Of moles gas= 2.52g/42.1gmol-1= 0.0598…

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).…

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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: Not all pollution is due to human activity. Natural sources, including volcanoes, also contribute to…

A: .  No of moles=Given massMolar mass. Mole fraction of A XA=Moles of ATotal no of moles. Partial…

Q: Calculating the mass of a gas collécted 8Ver Wai Sometimes in lab we collect the gas formed by a…

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

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

A: Ideal gas:-         A gas that follows Boyel's law, Charle's law and Avogadro's law strictly 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: 2.07x103 mol of an unknown gas effuses through a tiny hole in 217.25 s. Under identical conditions,…

A: The rate of effusion of the gaseous substance is inversely proportional to the square root of its…

Q: a scientist is allowing two different gases to effuse through a filter in a room. If the mass of 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: Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through…

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Q: Calcium perbromate, Ca(BrO4)2 (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas…

A: Given, molar mass of Ca(BrO4)2 is = 327.9 g. Temperature is = 50°C  Total volume is = 438 mL.…

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

A: rate of effusion ((r)  and molecular mass (M)  is related as         r α 1M  where rate of…

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

A: To Calculate molar mass of unknown gas , we would use the relation between rate of effusion and…

Q: Not all pollution is due to human activity. Natural sources, including volcanoes, also contribute to…

A: Given information: Mass of water vapor = 12.0 g Mass of SO2 = 7.5 g Mass of CO2 = 8.0 g Volume =…

Q: 4. A 30.6 g sample of gas occupies 22.414L at STP. What is the molecular weight of this gas?

A: As per the ideal gas equation: PV=nRT where, P = Pressure of gas V = Volume occupied by the gas n =…

Q: student synthesized 20.0 g of a fictional carbonate salt, M2(CO3)5 (MW: 532.14 g/mol) and reacted it…

A: When metal carbonates reacts with acid then they form metal salt, water and Carbon dioxide gas.…

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 molecules of gases are governed by four variables such as pressure, temperature, volume and…

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Q: Consider the following equation: C6H8O7(s)  + 3 NaHCO3(s) + H2O(l) --> Na3C6H8O7(s) + 3H2O(l) +…

A: Given mass of C6H8O7 = 193.6 molar mass of C6H8O7 = 192.1 g/mol Temperature = 313°K volume = 108.4 L

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

A:

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).…

A:

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: A gas is formed in the reaction shown below. The gas laws can help determine the volume of gas…

A: The answer to the following question -

Q: One method for preparing hydrogen gas is to pass HCl gas over hot aluminium: the other product of…

A: We have volume of hydrogen gas as 28.5L, temperature as 25.5°C, at sea level pressure is 1atm, we…

Q: Sometimes in Iad 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:

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: 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.