What can you blank or interfere from what you observe

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

In which phase(s) do the molecules take the shape of the container?

Why are pipes bursting in the in extremely cold weather?