A. It’s mass has changed if not that’s then it’s B.
Answer: Enthalpy for the dissolution reaction of one mole of aluminum nitrate is -158 kJ/mol.
Explanation:
It is known that the density of water is 1 g/mL. So, mass of water will be calculated as follows.
Mass = volume × density
= 
= 103.2 g
Specific heat of water is 4.18
.
Now, we will calculate the enthalpy of solution as follows.

= 
= 2372.5 J
As, 1 J =
. So, 2372.5 J will be converted into kJ as follows.
= 2.37 kJ
Molar mass of
= 213 g/mol
Hence, moles of
will be calculated as follows.
Moles of
= 
= 0.015
Therefore, enthalpy for the dissolution will be calculated as follows.

= -158 kJ/mol
Thus, we can conclude that enthalpy for the dissolution reaction of one mole of aluminum nitrate is -158 kJ/mol.
the answer is 4. a scientific law is often based in the scientific community
Answer:
502.08 J
Explanation:
1 cal is equal to 4.184 J so we simply do 120*4.184 to find the joules