ms1 = 590 g , c1% = 10%
Vs2 = 2000 cm3 (ml) = 2 L , Cm = 3,5 M
ro.sol.2 = 1,115 g/mL
m.apa.evaporata = 820 g
a.
stim c% = mdx100/ms
si Cm = md/miuxVs
miu.HNO3 = 63 g/mol
din c1% => md1 = ms1xc1%/100
= 590x10/100 = 59 g
din Cm => md2 = CmxmiuxVs
= 3,5x2x63 = 441 g
=> md.tot = md1 + md2 = 59 + 441 = 500 g
b.
stim ca ro = ms/Vs
=> ms2 = ro.sol.2xVs2 = 1,115x2000 = 2230 g
ms.tot = ms1 + ms2 - m.apa.evaporata = 590 + 2230 - 820 = 2000 g
=> c%.final = md.totx100/ms.tot
= 500x100/2000 = 25%