Q=538 joules, the reaction is endothermic q=538 joules, the reaction is exothermic
q=-538, the reaction endothermic
q=-538 joules, the reaction is exothermic

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

i'm pretty sure it is letter c.) car

i think its 5049.

i hope this !