Significant digits in intermediate answers

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    Significant digits
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Intermediate answers in calculations can include results from all steps leading to the final answer, not just those within the same calculation. In the example provided, the results from steps 1 and 2 should be treated as intermediate answers, rounded to 3 significant digits plus one additional digit to minimize roundoff error. This approach helps maintain accuracy throughout the calculation process. The final answer should then be reported in 3 significant digits. Proper handling of significant digits is crucial for precision in scientific calculations.
purpledonkey
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Just wondering if anyone could clarify what qualifies as an intermediate answer. Is this limited to answers within the same calculation, or all the answers from steps leading to the final one?

ie. What is the current needed to produce 10.0g of lithium in 1.00h?

Step 1: Determine moles of Li and thus moles of e- involved.
Step 2: Multiply moles of e- by farads.
Step 3: Calculate the current.

So, are the answers to steps 1&2 considered 'final' and rounded to 3 digits, or intermediate and rounded to 3+1 extra?
 
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Report the answer in 3 significant digits. Continue the calculation using 3+1 to minimize roundoff error and report the answer in 3 significant digits.
 
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