The answer for this question is MgF2
The best answer among the choices given is option A. Chemical weathering of rocks is a source of dissolved substances in the ocean. It is a process that involves the erosion of rocks due to chemical reactions by water and substances dissolved in the water. Therefore, it most likely the source of dissolved substances.
The spontaneity of a reaction can be predicted by the amount of Gibbs free energy. If it is negative, then the reaction is spontaneous. The reaction for Gibb's energy is
ΔG=ΔH-TΔS, where H is the enthalpy, T is the temperature and S is the entropy.
If the reaction favors low temperature, the enthalpy must be negative so that it will yield a negative ΔG. In other words, an exothermic reaction is spontaneous even at low temperatures. Also, the reaction could still be spontaneous if entropy is high, meaning, the system is not in order.
Answer:
0.2g
Explanation:
mass=mole/molar mass
molar mass of oxygen is 32
6.06/32=0.19 or 0.2 units=grams
