Isopropyl alcohol, (CH3) 2CHOH, is a common solvent. Determine the percent by mass of hydrogen in isopropyl alcohol. A) 6.71% H B) 13.4% H C) 25.0% H D) 53.3% H

Question

Elodie

Chemistry

8 March, 23:10

Isopropyl alcohol, (CH3) 2CHOH, is a common solvent. Determine the percent by mass of hydrogen in isopropyl alcohol. A) 6.71% H B) 13.4% H C) 25.0% H D) 53.3% H

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Spencer Wiggins · Answer 1

B) 13.4 %.

Explanation:

Isopropyl alcohol has the general molecular formula C₃H₈O. Its molar mass = 60.1 g/mol. The percent by mass of H = [ (no, of H atoms x molar mass of H) / (molar mass of isopropyl alcohol) ] x 100 = [ (8.0 atoms x 1.0 g/mol) / (60.1 g/mol) ] x 100 = 13.333 % ≅ 13.4 %.