Răspuns:
Explicație:
deduc masa molara a substantei, stiind ca numarul de moli se poate calcula astfel:
niu=m/M=V/Vm
11mg/M,mg/mmol=5,6ml/22,4-ml/mmol--- > M= 44mg/mmol=44g/mol
100g substanta.........54,55gC.....36,36gO.....9,09gH
44g..............................x...............................y... ...........z
x=24gC----> niu=m/M=24g/12g/mol= 2molC
y=16gO----> niu= 16g/16g/mol= 1molO
z=4gH-----> niu= 4g/1g/mol=4molH
SUBSTANMTA ESTE Â Â C2H4O