When a large evacuated flask is filled with argon gas, its massincreases by 3.224 g. When the same flask is again evacuatedand then filled with a gas of unknown molar mass, the massincrease is 8.102 g. (a) Based on the molar mass of argon,estimate the molar mass of the unknown gas. (b) What assumptionsdid you make in arriving at your answer?

Q: A mixture of C3Hg and C,H, has a mass of 2.0 g. It is burned in excess Oz to form a mixture of water…

A: Let mass of C2H2 in the original mixture = y g So, mass of C3H8 in the original mixture = ( 2 - y )…

Q: Phosphorus pentachloride decomposes according to the chemical equation PCl5(g)↽−−⇀PCl3(g)+Cl2(g)…

A:

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Q: parts per million

A:

Q: One compound under investigation for use as a lightweight rocket fuel is dimethylhydrazine (60.10…

A: Given reaction is  (CH3)2N2H4(l) + N2O4(l) -----> 3N2(g) + 4H2O(l) + 2CO2(g)  Mass of (CH3)2N2H4…

Q: How many grams of oxygen gas are produced when 2.43x10^-4 g of KClO3 are completely reacted…

A: • No. of moles = Given MassMolar Mass• Mass = No. of Moles x Molar Mass• Molar Mass of O2 = 32…

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Q: Which of the following is the correct stoichiometric ratio of 1:1 AgCH3COO to Ag2S given that the…

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Q: Which of the following are strong electrolytes? I. HCI II. HC2H3O2 III. NH3 IV. KCI O I, Il and III…

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Q: In theory, an increase in volume of a gas is the same as decreasing the concentration of reactant…

A: Applying basics definition of concentration.

Q: What volume of oxygen is produced from the decomposition of 472.65 grams of nitric acid (HNO)3

A: Decomposition of Nitric Acid (HNO3) as, 4 HNO3 (l) → 4 NO2 (g) + 2 H2O (l) + O2 (g)

Q: sis of ammonia from its elements. n the complete reaction of 15.6 ording to the following balanced

A: First Calculate the moles of H2 :  moles of H2 = ( mass / molar mass of H2 )  moles of H2 = ( 15.6 g…

Q: A sample weighing 3.056 g is a mixture of Fe, O, (molar mass = 159.69 g/mol) and Al, 0, (molar mass…

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Q: Molecular bromine, Br2, dissociates at elevated temperatures into bromine atoms, Br. Br₂(g) → 2Br(g)…

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Q: What is the mole fraction of 4.43 m KBr (aq)? Keep extra sig figs as you work this problem. Round to…

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Q: What mass in gram NaN3 is required to produce 50.2 L of N2 gas (density = 1.25 g/L ) according to…

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Q: Identify the problem as one of the stoichiometry types: For the reaction represented by the equation…

A:

Q: Which of the following gas samples would have the largest volume, if all samples are at the same…

A: At same temperature and pressure , volume of a gas is directly proportional to its no. of moles.

Q: What is the maximum mass of silver that can be obtained when 0.0202 g of hydrogen gas is bubbled…

A: Mass of Hydrogen = 0.0202 g Mass of silver nitrate = 2.81 g

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Q: (a) How many moles of CO, contain 3.26x1024 molecules? mol CO2 4.0 (b) What number of moles is…

A:

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Q: How many moles of oxygen are consumed in burning 1.6 moles of Benzene, C6H6?

A:

Q: Be sure to answer all parts. Nitroglycerin (C;H;N3O9) is a powerful explosive. Its decomposition may…

A: The decomposition reaction of nitroglycerine is as follows: 4C3H5N3O9 → 6N2 + 12CO2 + 10 H2O + O2…

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.