## Chemistry: The Central Science (13th Edition)

This question deals with classifying substances as pure substances, a heterogeneous mixture, or a homogeneous mixture. The specific substance is seawater. Seawater is a homogeneous mixture. Its main components are water ($H_{2}$O) and salt (NaCl). These parts are not chemically combined, but you can not see them separately with the naked eye. This makes it a homogeneous mixture.