Answer:
b) 2.00
Explanation:
Set up train tracks
58.3g Mg(oh)2 x 1mol mg(oh)2/58.3g mg(oh)2 x 2mol H2O/1mol Mg(OH)2
= 2 mol H2O
The thing that happens to the average kinetic energy of the molecules int the sample during the fist 3 minutes is :
the average kinetic energy decreases
You could see that the point start at around 190 and move down to the point f around 169
Hope this helps