## Intermediate Algebra for College Students (7th Edition)

$1.06\times10^{-18}$gram
Multiply mass of one oxygen molecule with 20,000. Note that $20,000 = 2\times10^{4}$ in scientific notation. $=(5.3\times10^{-23})\times(2\times10^{4})$ $=(5.3\times2)(10^{-23}\times10^{4})$ $=10.6\times10^{-23+4}$ $=10.6\times10^{-19}$ gram Then, write 10.6 in scientific notation. $=1.06\times10^{1}\times10^{-19}$ $=1.06\times10^{-18}$ gram