A colorless crystalline compound D is analyzed and found to contain 40.0 % C, 6.7 % H
CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A colorless crystalline compound D is analyzed and found to contain 40.0 % C, 6.7 % H, and 53.3 % O by mass.
Molar masses: C = 12.0 g mol−1, H = 1.01 g mol−1, O = 16.0 g mol−1
(1) Determine the empirical formula of compound D. Show all calculations, including mole ratios and the final lowest whole-number ratio.
(2) Based on the empirical formula you obtained, decide whether compound D is most likely molecular or ionic. Provide two pieces of evidence from its elemental composition and stoichiometry to support your claim.
(3) Identify one macroscopic physical property you would measure experimentally to further confirm your classification in part (b). Explain how the expected observation supports your conclusion.