1. Significant Figures

2. This can be difficult so … This can be difficult so … Hold on tight for a wild ride Hold on tight for a wild ride

3. Rule 1: All nonzero digits are SIGNIFICANT 673 has 3 sig figs 673 has 3 sig figs 2.8 has 2 sig figs 2.8 has 2 sig figs 5.325 x 10 8 has 4 sig figs 5.325 x 10 8 has 4 sig figs

4. 506 has three 506 has three 1.009 has four 1.009 has four 1.01 x 10 4 has three 1.01 x 10 4 has three Rule 2 -All zeros “ sandwiched ” or between nonzero digits are significant

5. Rule 3: Trailing zeros are significant if the number contains a decimal point 34,800. mL has five sig figs 34,800 mL has three sig figs

6. 2.90 x 10 3 has three sig figs

7. Rule 4: Leading zeros that function only to hold the decimal point are NOT significant 0.0032 mL has 0.0032 mL has two sig figs two sig figs 0.0000009 m has 0.0000009 m has one sig fig one sig fig

8. Rule 5: Zeros in a decimal number after a non-zero digit are significant 0.000530 kg has 0.000530 kg has three sig figs three sig figs 0.400100 cm has 0.400100 cm has six sig figs six sig figs

9. QUIZ 198.03 198.03 8,040 8,040 1.65005 1.65005 0.000430 0.000430 10.0040 10.0040 50,100. 50,100.