Question

Oblicz, ile gramów etanolu znajduje się w 500g 42% roztworu .

Answer 1

Mr=500g
Cp=42%
Cp=ms/mr*100%?mr
Cp*mr=ms*100%/:100%
Cp*mr/100%=ms
ms=42*500/100
ms=210

Pozdrawiam ;)

Answer 2

Dane:
Cp=42%
mr=500g

Cp=ms/mr*100%
Cp*mr=ms*100%
ms=Cp*mr/100%

ms=42%*500/100%=210g

znajduje się 210 g etanolu.

Answer 3

Mr= 500g ms=? Cp=ms/mr *100%
Cp=42% ms= Cp*mr/100%

ms = 42*500/100= 210g.