Question

Ajutatima va rog mult!!!!!!!

Answer 1

a)m sol totale = 150 g + 50000g = 50150g
m sub = 10% * 150g /100%=15g
aflam ωdupa dilutie
ω= 15g /50150g *100% = 0.02%

b) msubst totale = 15g + 50g = 65g
ω= 65g /150g *100%=43.33%

c) m subst= 50g * 20% /100%=10g
msubst totale = 10g + 15g =25g
m sol totale = 50g + 150g = 200g
ω= 25g / 200g *100%=12.5%

d) m subst= 150g * 2% /100%=3g
msubst totale = 3g + 15g =18g
m sol totale = 150g + 150g = 300g
ω= 3g / 300g *100%=1%