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
To determine which pair of gases cannot be collected by downward delivery, we need to compare the density of each gas to the density of air. Downward delivery (also known as upward displacement of air) is a method used to collect gases that are denser than air. Gases that are less dense than air are collected by upward delivery (downward displacement of air). The average molar mass of air is approximately 29 g/mol. Step 1: Calculate the molar mass of each gas. Molar mass of SO_2: 32.07 + 2(16.00) = 64.07 g/mol Molar mass of NH_3: 14.01 + 3(1.01) = 17.04 g/mol Molar mass of CO: 12.01 + 16.00 = 28.01 g/mol Molar mass of N_2: 2(14.01) = 28.02 g/mol Molar mass of Cl_2: 2(35.45) = 70.90 g/mol Molar mass of H_2S: 2(1.01) + 32.07 = 34.09 g/mol Step 2: Determine if each gas can be collected by downward delivery (i.e., if it is denser than air). SO_2 (64.07 g/mol) is denser than air (29 g/mol), so it can* be collected by downward delivery. NH_3 (17.04 g/mol) is less dense than air, so it cannot* be collected by downward delivery. CO (28.01 g/mol) is less dense than air, so it cannot* be collected by downward delivery. N_2 (28.02 g/mol) is less dense than air, so it cannot* be collected by downward delivery. Cl_2 (70.90 g/mol) is denser than air, so it can* be collected by downward delivery. H_2S (34.09 g/mol) is denser than air, so it can* be collected by downward delivery. Step 3: Evaluate each pair. The question asks for the pair of gases that cannot be collected by downward delivery. This implies that for the chosen pair, neither gas should be suitable for downward delivery. *A. SO_2 and NH_3