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obliczam objetość 1 mola z równania
pV=nRT [ t= 250 C = (273+250) K =523 K ]
[1 atm = 1,013 *10^5 Pa]
V= (nRT)/p = (1*8,31*523)/ (300*1,013*10^5)
V= 1,43* 10^-4 m3 = 0,143 dm3
gęstość = masa molowa / objętość 1 mola
d= M/ V = 17g / 0,143 dm3 = 118,9 g/dm3