What do the monopoly chance cards say?

A Monopoly property card lists the mortgage value for the property (one half of the board purchase price). The card also provides the price for houses added, and what the rent is for opponents, either with no development, with one to four houses, or with a hotel.

It also states the double rent rule, which only applies to undeveloped properties that are part of a monopoly -- the base rent is doubled, but not once a property has any houses or hotels.