12. The value of universal gas constant is 8.3 J/mole/K, the mean kinetic energy of 32 gm of oxygen at – 73°C will be
(a) 480 J
(b) 4980 J
(c) 2490 J
(d) The information is incomplete
Answer-c
(10)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (126)