Chapter 1 - The Nature of Chemistry - Questions for Review and Thought - General Questions - Page 41e: 79

0.197 nm = 197 pm

1 nm = $10^{-9}$ m 1 pm = $10^{-12}$ m $1.97 Å \times \frac{1\times10^{-10}m}{1 Å} \times \frac{1 nm}{1\times10^{-9}m} = 0.197$nm $1.97 Å \times \frac{1\times10^{-10}m}{1 Å} \times \frac{1 pm}{1\times10^{-12}m} = 197$pm