Averages for Havana in August. The month of August can be unbearably hot in Havana. Visitors at this time of year are often there for one purpose and that is to swim in the incredibly warm waters of the Gulf of Mexico. As the midday heat descends upon the Cuban capital city, Havana, everyone heads to the water or inside to keep cool.
A compound can have properties different from its constituents,  as a new substance is formed when the constituents are chemically  combined.  The constituents of a compound can be separated only by  chemical methods.     Mixtures    Mixtures are impure substances.
Compounds A compound is made up of two or more types of elements (e.g. water and carbon dioxide) that are chemically combined in a set ratio. They cannot be broken down into â¦ two or more simpler substances by physical means, only by chemical means.Properties of compounds differ from those of their elements.hey are written in a formula. A compound is a pure substance made up of 2 or more chemically combined elements. that are combined, and combine a lot. they are also together so that means that they are combined.