H2SO4 + KOH → K2SO4 + H2OCu + 2AgNO3 → Cu(NO3)2 + 2AgNiCl2 + NaOH → Ni(OH)2 + 2NaCl\\H2 + O2 → 2H2OAll of the equations above show what?
A. Reactants combining with products to produce a new substance
B. No chemical changes occurring
C. Physical changes taking place
D. Reactants combining to produce new substances
This question is part of Chemistry Final