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Cel mai inteligent răspuns!
2014-07-30T19:40:22+03:00
1 torr = 1/760 atm => 722 torri = 722/760 atm = 0,95 atm
pV=(m*R*T)/masa molara 
=> masa molara = m*R*T/p*V
=> masa molara =(4,93*0,082*273)/(0,95*1,77)=65,3665 g/mol
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