Answer:
100 million hydrogen atoms.
Explanation:
To find the number of hydrogen atoms lined side by side that would make the line 1 cm long, we divide the total length i.e 1 cm by the size of each hydrogen atom i.e 0.1 nm.
First we convert all given values to meter
\(1 cm = 0.01 m\)
\(0.1 nm = 1X10^{-10} m\)
Now we can divide the converted values
No of hydrogen atoms = \(\frac{0.01}{1X10^{-10} }\)
= 100,000,000 = \(1 X 10^{10} hydrogen-atoms\)
i.e 100 million hydrogen atoms of diameter 0.1 nm would be lined side by side to make a line 1 cm long.
