So in one hour half the amount remains (that's what half life means). In two hours 1/4 (or half of half) would remain and in three hours 1/8 would remain.
So the answer is 1/8
Explanation:
element with atomic numbers 7 and 83 have 5 and 5 valence electrons
These substances can be separated by distillation, so your answer is A.
The postmortem cooling or algor mortis gets fixed by 8- 10 hours after death. The temperature of the body after death can be used to determine the time since death.
At the end of the reaction, the catalyst is UNCHANGED.
:)