January 2019 1 62 Report
Tolong dong di jawab

diketahui energi ikatan H-F = 565 kJ/mol, H-H = 436 kJ/mol, F-F= 158 kJ/mol. energi yang di lepas pada pembentukan 5 gram HF (Mr=20 kJ/mol) dari unsur unsur adalah
a. -268 kJ
b.-201 kJ
c. -124 kJ
d. -67 kJ
e. -33.5 kJ

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