Answer: both are solid at room temperture
Explanation:
Answer:
Reverse the 
reaction
Explanation:
Reactions:
Overall:
As can be seen, in the overall reaction we have 
in the reactants like in the second reaction and 
in the products. The is in the first reaction but as a reactant so we need to reverse that reaction:
Combining:
Answer: It changed in identity and properties.
Explanation:
I think the right answer for this question is option A. The energy absorbed so the mass will be increased.
