C. 18.0g. all you really have to do is add both of them together and you get your answer.
I'm pretty sure all 4 are subatomic particles but if i had to guess i'd be Photons
The answer is
2Ag+(aq) + SO4-2(aq) → Ag2SO4(s)
<span>NO3- and K+ ions are spectators </span>
If the enthalpy change is negative, then the reaction is exothermic because heat energy was lost to the surroundings.
If the enthalpy change was positive, then the reaction was endothermic because heat energy was gained from the surroundings!
Hope this helps!! x
