Which of the following fractions can be used in the conversion of 27 cm3 to the unit m3? one m over ten to the negative second power cm one ml over one cubic cm fraction cubed: ten to the negative 2 m over 1 cm fraction cubed: one meter over ten to the negative 2 centimeters

The conversion that will be used is ten to the power negative 2 meter over 1 cm whole cubed.
This is because one centimeter is equivalent to ten to the power negative 2 meters and because the unit at hand is centimeter cubed, we take the cube of this conversion. Moreover, centimeters should be in the denominator in order ot cancel the units.

Copper, silver, aluminum, cobalt, chromium, mercury 

It shows that the experiment is designed properly.