This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
You're on a roll — The question asks which gas can be collected by downward displacement of air. This method is used for gases that are less dense than air. Step 1: Determine the average molar mass of air. Air is primarily composed of nitrogen (N_2) and oxygen (O_2). Molar mass of N_2 = 2 × 14.01 = 28.02 g/mol Molar mass of O_2 = 2 × 16.00 = 32.00 g/mol The average molar mass of air is approximately 29 g/mol. Step 2: Calculate the molar mass of each gas option. A. Chlorine (Cl_2): Molar mass of Cl_2 = 2 × 35.45 = 70.90 g/mol B. Sulphur(IV) oxide (SO_2): Molar mass of SO_2 = 32.07 + (2 × 16.00) = 32.07 + 32.00 = 64.07 g/mol C. Ammonia (NH_3): Molar mass of NH_3 = 14.01 + (3 × 1.01) = 14.01 + 3.03 = 17.04 g/mol D. Carbon(IV) oxide (CO_2): Molar mass of CO_2 = 12.01 + (2 × 16.00) = 12.01 + 32.00 = 44.01 g/mol Step 3: Compare the molar masses to that of air. Chlorine (70.90 g/mol) is denser than air. Sulphur(IV) oxide (64.07 g/mol) is denser than air. Ammonia (17.04 g/mol) is less dense* than air. Carbon(IV) oxide (44.01 g/mol) is denser than air. Gases less dense than air are collected by downward displacement of air (where the collection vessel is inverted, and the gas fills it from the bottom up, pushing air out from the bottom opening). Therefore, ammonia is the gas that can best be collected by downward displacement of air. The final answer is C. What's next?