Atechnician experimentally determined the boiling point of octane to be 124.1°c. the actual boiling point of octane is 125.7°c. calculate the percent error. page 72 #16 determine the number of significant figures in each of the following measurements? 11 soccer players 0.070020 meter 10,800 meters 0.010 square meter 5.00 cubic meters 507 thumbtacks page 72 #17 solve the following and express each answer in scientific notation and to the correct number of significant figures. (5.3 x 104) + (1.3 x 104) (7.2 x 10-4) ÷ (1.8 x 103) 104 x 10-3 x 106 (9.12 x 10-1) - (4.7 x 10-2)

Percent error=(experimentally determined boiling point-actual boiling point)

                   =(124.1 - 125.7) = 1.6 °C

Quantity                   Number of significant figures

0.070020 meter                     5

10,800 meters                        5

0.010 square meter               2

5.00 cubic meters                  1

507 thumbtacks                     3

 (5.3 x 10⁴) + (1.3 x 10⁴) =6.6 x 10⁴

(7.2 x 10⁻⁴) ÷ (1.8 x 10³)=4 x 10⁻⁷

10⁴ x 10⁻³ x 10⁶=10⁷

(9.12 x 10⁻¹) - (4.7 x 10⁻²)=(9.12 x 10⁻²) - (4.7 x 10⁻²)

                                          =(91.2-4.7)  x 10⁻²

                                           =85.5 x 10⁻²