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A¹°Áú ¹«°Ô´Â 5.95 g À̸ç..........¹°³óµµ´Â ?  wt%
B¿ëÁ¦ ¹«°Ô´Â 5.05 g ÀÔ´Ï´Ù........¹°³óµµ´Â 0.45wt%
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Stefano Stefano   39-08-02 00:00
Data given
(1) A=5.95 = W + a
(2) B=5.05 =  w + b = 5.05(0.0045) + 5.05(1-0.0045)
(3) (W+w)/(A+B)=0.015

Then,
(4) W/A=??

Solution
(3)=>  (W+w)/(A+B)=0.015
(4) W=0.015(A+B)-w

Therefore
(5) W/A=0.015(1+B/A)-w/A

A=5.95, B=5.05, w=5.05(0.0045), A+B=11.0
Transfer these figures to (5), and get W/A=?
or get it from:
(6) W/A=0.015(A+B)/A-w/A
Stefano Stefano   39-08-02 00:00
W/A=0.015(11.00)/5.95-(0.0045)(5.05)/5.95
  =0.02773-0.003819 =0.0239 = 2.39 w%
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Çлý Çлý   39-08-02 00:00
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