Question

1. the radius of a carbon atom is 70 pm. how many centimeters is 70 pm?

Explanation:

Step1: Recall the conversion factors

We know that $1\ pm = 1\times10^{-12}\ m$ and $1\ m= 100\ cm = 1\times10^{2}\ cm$.

Step2: Convert picometers to centimeters

First convert $70\ pm$ to meters: $70\ pm=70\times1\times 10^{-12}\ m = 7\times10^{-11}\ m$.
Then convert meters to centimeters: $7\times 10^{-11}\ m=7\times10^{-11}\times1\times10^{2}\ cm=7\times10^{-9}\ cm$.

Answer:

$7\times 10^{-9}\ cm$