Answer
3.57 * 10^-8
Work Step by Step
one million A = 10^-8cm so.. 1cm³ x (4 atoms / (5.43cm)³) = __ atoms *** b *** if that ppm skill one million atom P consistent with 10^6 atoms Si.. then.. 1cm³ x (4 atoms Si / (5.43cm)³) x (one million atom P / 10^6 atoms Si) x (one million mole P / 6.022x10^23 atoms P) x (__g P / mole P) = __ g P
1cm³ x (4 atoms / (5.43x10^-8 cm)³) = __ atoms and.. 1cm³ x (4 atoms Si / (5.43x10^-8 cm)³) x (one million atom P / 10^6 atoms Si) x (one million mole P / 6.022x10^23 atoms P) x (__g P / mole P) = __ g P
