classwork 1

CHEMISTRY

Classwork

1. Write the number 93,000,000 to have 5 significant figures.

2. Express the following numbers in scientific notation:

0.00000000066

356

47,764

0.096

3. Write the number of significant figures in the following measurements:

422 cm 6.02 g 0.825 m 0.0043 g


7000 mL 0.0000003 cm 6001 sec 1.310 x 1022 atoms

4. The surface area and average depth of the Pacific Ocean are 1.8 x 108 km2 and 3.9 x 103 m, respectively. Calculate the volume of water in the ocean in liters.

5. Convert the temperature scales.

65 C = ? K 405.15 K = ? C 607.15 K = ? F 86 F = ? C

= ? F

98 F = ? K