-calculez masa molara din densitate
d= M/Vm=
dar d=m/v= 13,30mg/10ml= 13,30g/10 l=1,33g/l
deci M/22,4 l/mol= 1,33---> M=29.8g/mol, aproximativ 30g/mol
determin f.moleculara
100g......40gC.......53,33gO........6,66gH
30g.......x=12g.......y= 16g,,,,,,,,,z= 2g
niuC= 12g/12g/mol= 1molC
niuO= 16g/16g/mol= 1molO
niu=2g/1g/mol= 2molH-------------------------> CH2O H2C= O aldehida