Which reactions show an oxide acting as a base?
check all that apply.

k2o(s)+h2o(l)→2k+(aq)+oh−(aq)
so3(l)+h2o(l)→ h+(aq)+hso4−(aq)
al2o3(s)+6oh−(aq)+3h2o(l)→2al(oh)−4 (aq)
al2o3(s)+6h+(aq)→2al3+(aq)+3h2o(l)< br /> sio2(s)+2oh−(aq)→ sio3−(aq)+h2o(l)
mgo(s)+2h+(aq)→mg2+(aq)+h2o(l)

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

Which of the following molecules is polar? c3h7oh c2h5cooh

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .