Răspunsuri

2014-10-29T22:08:30+02:00
Calculezi masele moleculare ale cristalohidratilor
M cuso4*5h2o=160+5*18=250g/mol
250g cristalohidrat.........90g apa
100..................................x
x=36%
si la fel clculezi si pt celalat
3 3 3