Answer: The correct answer is The aplastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Explanation: The formula for Gravitational potential energy is= mgh where
m= mass
g= 9.8
h= height
On the other hand the formula for elastic potential energy is (1/2)KX^2
Where K is the spring. By changing the values of H and X, we will see elastic potential energy will remain more.
The bracket just separate an atom or the ion and in the above it means there are two hydroxide molecules
so bracket function is just to separate ions and molecules
hope it helps
Remember:
Density = mass/volume
Volume = mass/density
Volume = 193 g/ 19.3 g cm ^ -3
Volume = 10 cm^3