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.
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Question 1: a) A: Thermometer B: Liebig condenser b) The function of part A (thermometer) is to measure the temperature of the vapor to ensure that the liquid being collected is pure and boiling at its characteristic boiling point. Question 2: Step 1: Convert the percentage abundances to fractional abundances. For ^10K: 18.69\% = 0.1869 For ^11K: 81.28\% = 0.8128 Step 2: Calculate the relative atomic mass using the formula: Relative Atomic Mass = (Isotopic Mass × Fractional Abundance) Relative Atomic Mass of K = (10 × 0.1869) + (11 × 0.8128) Step 3: Perform the multiplication. 10 × 0.1869 = 1.869 11 × 0.8128 = 8.9408 Step 4: Add the results to find the relative atomic mass. Relative Atomic Mass of K = 1.869 + 8.9408 = 10.8098 Step 5: Round the answer to an appropriate number of significant figures. Given the abundances are to two decimal places, we can round the final answer to two decimal places. Relative Atomic Mass of K ≈ 10.81 The relative atomic mass of K is 10.81. 3 done, 2 left today. You're making progress.