Oblicz, ile gramów 6%-owego roztworu należy poddać odparowaniu, aby otrzymać 18 gramów substancji.
Cp=ms*100%/mr
Cp/100%=ms/mr
mr=100%*ms/Cp
mr=100%*18g/6%
mr=300g
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Cp=ms*100%/mr
Cp/100%=ms/mr
mr=100%*ms/Cp
mr=100%*18g/6%
mr=300g