Question

At room temperature, ethanol's density is 0.789 g/mL while water's density is 0.997 g/mL. When a few milliliters of ethanol are added to water, the two liquids mix. A student is given a unknown liquid at room temperature and experimentally determines its density to be 0.947 g/mL. Is the liquid is pure ethanol, pure water, or a mixture? If it is a mixture, does it contain more ethanol or more water?