Acce chem M.3 sig figs

significant figures

All digits in a measurement known with certainty (have a definite mark) and are estimated or uncertain digit

Rule 1

All non-zero digits are significant

Rule 2

zeroes between non-zero digits are significant

Rule 3

Zeroes at the end of a number are only significant if a decimal is present

rule 4

Zeroes at the beginning of a decimal are NEVER significant

Rule 5

Unlimited number sig figs, defined equalities and counting numbers

Sig figs with multiplying and dividing

The answer can only have as many sig figs as the least amount in the problem

Sig figs with addition and subtraction

The answer can only have as many decimals as the least amount of decimal places

0mL

Infinity sig figs

O. mL

1 sig figs

0.0 mL

2 sig figs