Which of the following chemical reactions is a redox reaction? NH4OH (aq) + KCl (aq) KOH (aq) + NH4Cl (aq)

Zn (s) + H2SO4 (aq) ZnSO4 (aq) + H2 (l)

H2SO4 (aq) + CaCl2 (aq) CaSO4 (aq)+ HCl (aq)

HBr (aq) + KOH (aq) KBr (aq) + H2O (l)

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Define a is a tiny pavket of energy