The unit of length convenient on the atomic scale is known a an angstrom and is denoted by `A10^(10)m`. The radius of the hydrogen atom is about 0.5 A. What is the total atomic valume in `m^(3)` of a mole of hydrogen atoms?
A. `3.15xx10^(-7)m^(3)`
B. `3.15xx10^(-9)m^(3)`
C. `3.15xx10^(-4)m^(3)`
D. `3.15xx10^(-20)m^(3)`
