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)

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion. what is the frequency f of oscillation?

What is the vapor pressure of a solution with a benzene to octane?