Ihave an apex question im stuck on. the question is: which two of the following reactions would happen on their own?

a. al-> 3nacl -> acl3 +3na
b. fe+snbr2-> febr2+sn
c. zn+fese-> znse+fe
d.3zn+al2o3-> 2al+3zno

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)

11) burning your hand when accidentally touching a hot plate is an example of which heat transfer? a. conduction b. convection c. radiation d. none of these