Melting water is an example of a physical change because the atoms are pulled apart to form a new substance. bonds are broken and atoms are rearranged. the identity of the substance does not change. it does not involve intermolecular forces or particle motion.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature