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Jul 13th, 2018
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- 16) 1,02 g + x = 25 g
- x=25g - 1,02g = 23,98g
- 25 - 100%
- 1,02 - x
- x=102/25=4,08%
- 17)0,03M - 1L
- x - 0,002L
- x=0,00006 M
- 1 M NaOH = 40g
- 0,00006 M NaOH = x
- x=0,0024g
- 750g-100%
- 0,0024g-x
- x=0,24/750=0,00032%=3,2*10^-4%
- 18)0,2M - 1000 ml
- x - 25 ml
- x=0,005M=5mM
- 1M Na2CO3-106g
- 0,005M-x
- x=0,53g
- 19)ro=m/v
- m=vro
- m=1,45kg/l*0,005l=0,00725kg=7,25g
- 7,25g*43,4%=3.14g
- 1M KOH = 56g
- x = 3,14
- x=0,06M
- 0,06M = 100 ml
- x = 1000 ml=1l
- x=0,6 M
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