Answer
The mass of 80,000 hydrogen atoms in scientific notation is \[1.336\times {{10}^{-19}}\]gram.
Work Step by Step
It is provided that the mass of one hydrogen atom is \[1.67\times {{10}^{-24}}\text{ gram}\]and it is already in scientific notation.
Write 80,000 Hydrogen atoms in scientific notation as follows:
\[80,000=8.0\times {{10}^{4}}\]
Now, Mass of 80,000 Hydrogen atom is:
\[\begin{align}
& 8.0\times {{10}^{4}}\times 1.67\times {{10}^{-24}}=\left( 8.0\times 1.67 \right)\times \left( {{10}^{4-24}} \right) \\
& =13.36\times {{10}^{-20}} \\
& =1.336\times {{10}^{-19}}\text{ gram}
\end{align}\]
Hence, the mass of 80,000 hydrogen atoms in scientific notation is \[1.336\times {{10}^{-19}}\]gram.
