a graduated cylinder has 25ml of water placed in it. an irregularly shaped rock is then placed in the graduated cylinder and the volume of the rock and water in the graduate cylinder now reads 50mL. the mass of the rock is 18g. calculate the density of the rock.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder