Me find the potential energy and explain

To find Potential Energy just multiply the mass to accleration due to gravity which is constant (9.8 m/s²) and height or PE =mgh

.Table 1: height is 0.40m

PE1 = 1.1J

PE2= 1.5J

PE3= 1.9J

Table 2: height is 0.32m

PE1= 0.9J

PE2= 1.2 J

PE3= 1.5J

Table 3: height is 0.42m

PE1= 1.2J

PE2= 1.6 J

PE3= 1.98 J

Explanation:

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"