This portion is taken from CHEM Fall 2024
Significant figures:
- No zero → significant
- Zero
- Leading (before .) → non sig
- Between → sig
- Trailing (after non zero numbers) → is there a decimal?
- Yes decimal → sig
- No decimal → no sig
@@ Exact number:
- something you can count exactly → infinite numbers of sig figures
- Conversion: example: 1 inch = 2.54cm exactly
- Metric prefixes 2cm
- Scientific notation: sig figure x10
Rounding:
- Multiply/Dividing: can’t have more sig fig than original
- Add/Minus: can’t have more fig after . than original