1. The diameter of a helium atom is about 30. Pm. Write this length using exponential notation with units of km.

2. The diameter of the earth is about 1.28x10^4 km. Write the using units of nm.

3. Convert 8.4 nm to km.

4. Convert 8.4 nm^2 to k^2.

5. Convert 7.35x10^45 hm to nm.

6. Convert 7.35x10^45 hm^3 to nm^3.

7. Convert 5.3 mL to dm^3.

8. Convert 1.3 L to mm^3.

9. Convert 9.43 gallon to Mm^3( mega meters cubed).

10. Convert 8.21x10^5 dam^3 (decimeters cubed) to cL.