Based on the enthalpy changes given for the reactions, which reactions are endothermic? 2H20 → 2H2 + O2, AH = 484 kJ
C + 02 → CO2, AH = -394 kJ
H2 + Br2 → 2HBr, AH = -73 kJ
2NH3 + N2 + 3H2, AH = 92 kJ

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Go ask spider man

Ithink iit might be