Signals Notebook: Significant Figures Rounding Rules in the Stoichiometry Table

Problem

In the stoichiometry table, calculated values (e.g., Sample Mass or Volume) may appear rounded to fewer significant figures than expected. This occurs because Signals Notebook applies a significant figures rounding rule during calculations.

Solution

Signals Notebook rounds calculated values in the stoichiometry table based on the following rules:

• Significant Figures Rounding Rule (Basic Behavior)
  The final calculated value is basically rounded to the fewest number of significant figures among the input values used in the calculation.
  For example, if you enter a Sample Mass of "5 g" (1 significant figure) and a Density of "1.05 g/mL" (3 significant figures), the calculated Volume will be rounded to 1 significant figure (e.g., "5 mL") rather than "4.76 mL".
• Exceptions to the Rounding Rule
  Certain fields, such as Amount Ratio, are excluded from the significant figures rounding rule and do not affect the precision of the calculated result.

How to Adjust:
If the calculated value does not meet your required precision, increase the number of significant figures in the input values (e.g., enter "5.00 g" instead of "5 g").

Note: Except for certain input fields, you can configure Signals Notebook to automatically add trailing zeros to input values in the stoichiometry table during data entry, based on the significant figures setting in Signals Configuration. For more details, please refer to the following article: Signals Notebook: Zeroes are being appended automatically to all values of the stoichiometry table except density