Question

A hydrogen atom is about 0.1 nm in diameter. How many hydrong atoms lined up side by side would make a line 1 cm long?

Answer 1

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.

Answer 2

The answer is 1.1nm dude by side