Which one of the equations below is an endothermic reaction?
A) Sro (s) + CO, (9) - SrCO, (S)AH° = -234
KJ/mol
B) H2(g) + F2 (g) 2 HF (9) AH° = -79.2
KJ/mol
C) H2 (9) + C (s) + N, (g) - 2 HCN (9) AH° =
270.3 kJ/mol
D) 2 K (s) + 2 H20 (1)
AH° = -393.1 kJ/mol
2 KOH (aq) + H2 (9)

a:

by the combination of an unlimited number of elements

58750.08068 is the answer i think

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.