The student is aware that when put in a sink full of water, the styrofoam will float and the wood will sink. Use the particle diagram to explain why this occurs. In your response, compare and contrast the mass, volume and densities of the two substances.

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule