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a guest Jul 13th, 2018 69 Never
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  1. 16) 1,02 g + x = 25 g
  2.     x=25g - 1,02g = 23,98g
  3.  
  4. 25 - 100%
  5. 1,02 - x
  6.  
  7. x=102/25=4,08%
  8.  
  9. 17)0,03M - 1L
  10.    x - 0,002L
  11.  
  12. x=0,00006 M
  13. 1 M NaOH = 40g
  14. 0,00006 M NaOH = x
  15.  
  16. x=0,0024g
  17.  
  18. 750g-100%
  19. 0,0024g-x
  20.  
  21. x=0,24/750=0,00032%=3,2*10^-4%
  22.  
  23. 18)0,2M - 1000 ml
  24.    x - 25 ml
  25.  
  26. x=0,005M=5mM
  27.  
  28. 1M Na2CO3-106g
  29. 0,005M-x
  30.  
  31. x=0,53g
  32.  
  33. 19)ro=m/v
  34. m=vro
  35.  
  36. m=1,45kg/l*0,005l=0,00725kg=7,25g
  37.  
  38. 7,25g*43,4%=3.14g
  39.  
  40. 1M KOH = 56g
  41. x = 3,14
  42.  
  43. x=0,06M
  44.  
  45. 0,06M = 100 ml
  46. x = 1000 ml=1l
  47. x=0,6 M
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