A sample of C10H7OH was found to be contaminated with a small amount of LiBr. The combustion analysis of the sample gave the following results: 77.48% C and 5.20% H. Assume that the only species present are C10H7OH and LiBr, calculate the percentage purity by mass of the sample.(adsbygoogle = window.adsbygoogle || []).push({});

First of all, what is the percentage of purity by mass...? And second, does it mean that 100%-77.48%-5.20% gives the percentage of O and LiBr?

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# Urgent Purty Problem

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