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Occasionally, in answering a question, a textbook chemist may convert his or her answer out of SI units for the final answer. My problem is that this can often mean a very different result in terms of significant figures to my own answer (which I generally keep in SI units no matter how 'unusual' it might be in a particular context.) Is it acceptable for these conversions to be made before the number of significant figures are determined? |
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The answer writers for textbooks are often lazy, and perform rounding too early. You should always apply significant figures last, regardless of where SI units are present. |
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