Would 0.85 g of rice float sink or suspend in tap water?

Whether 0.85 g of rice floats, sinks, or suspends in tap water depends on its density relative to water. Most types of rice have a density less than that of water (1 g/cm³), so they will generally sink. However, if the rice is cooked or has air trapped within it, it may float. In typical circumstances, uncooked rice would sink in tap water.