A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is

14.4

nm

. What is the total width of a crystal in millimeters

105

molecules across? Write your answer as a decimal.

The spacing is 14.4 nm (nanometers).

It is 14.4 * 10^ (-9) m

And 1 mm = 1 * 10^ (-3) m

14.4 nm * 105 = 1,512 nm = 1.512 micrometers = 0.001512 mm

Or : 1.512 * 10^ (-3) mm

Answer: The total width of crystal is 0.001512 mm.