Question

what is the length in millimeters of a crystal of copper sulfate that is 0.180 in. long?

Explanation:

Step1: Recall conversion factor

1 inch = 25.4 millimeters

Step2: Set up conversion

Let $x$ be the length in millimeters. We have the proportion $x = 0.180\times25.4$

Step3: Calculate result

$x=0.180\times25.4 = 4.572$

Answer:

4.572 mm