Question

1. m substanta = 200g
c1=15%
c2=10%

m apa adaugata = ?

2. m substanta initiala = 800g
c initiala=30%
c finala =45%

m apa evaporata=?

Urgent

Answer 1

1.ms1=200g
c1=15%
c2=10 %
mapa adaugata=?
 md=c1*ms1/100=15*200/100=30 g
ms2=md*100/c2=30 *100/10=300g 
mapa adaugata=ms2-ms1=300-200=100g
2.ms1-800 g
c1=30%
c2=45%
mapa evap=?
md =c1*ms1/100=30*800/100=240 g
ms2=md*100/c2=240*100/45=533,33
mapa evaporata=ms1-ms2=800-533,33=266,66g