Answer:
See below
Explanation:
.75 = 1/2^(40/h)
log .75 / ( log 1/2) = 40 / h
<u>h = half life = 96.37683 min</u>
It should be B. All of the other choices are used often by abusers
Answer:
Dry ice undergoes sublimation, an endothermic change at room temperature.
Add 450 million grams to the solution
