Chemistry — Percent Composition
Mass percent of an element and formula mass.
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\%\,\text{element} = \frac{n\,A_r}{M_r}\times 100
M_r = \textstyle\sum n_i A_{r,i}
n = \frac{m}{M_r}
\text{atoms} = n\,N_A
Mass percent of an element and formula mass.
\%\,\text{element} = \frac{n\,A_r}{M_r}\times 100
M_r = \textstyle\sum n_i A_{r,i}
n = \frac{m}{M_r}
\text{atoms} = n\,N_A