Significant Figures

Question 1

What is sig figs

Answer 1

An measurement with a known value with certainty plus a final estimated digit

Question 2

Rules

Answer 2

1. non-zero digits are significant
2. zeros between non-zero digits are significant
3. Zeros to the left of the first non-zero digit is not sig.
4. Zero to the right of the last non-zero digit is sig. if there is decimal point
5. Zero to the right of the last non-zero digit is not sig. if there is no decimal point.

Question 3

Rounding off

Answer 3

Add = to the nearest decimal place
sub = to the lowest amount of sig. figs. in the original number.