The number of atoms in 1 gram of hydrogen is approximately \(6.02\times10^{23}\).
A sample contains \(5\times10^{-4}\) grams of hydrogen atoms.
Find the number of atoms in the sample. Give your answer in standard form.[1]
Each atom has a diameter of \(1.06\times10^{-10}\text{ m}\). If all the atoms were laid end to end in a straight line, find the total length of the line in kilometres. Give your answer in standard form.[2]
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