3. Which of the following is a physical property? A. A pipe cracks when the water inside freezes
B. Paper turns to ashes when ignited
C. Iron turns into rust when in contact with water over time
D. Baking a bread

How are isotopes of the same chemical element alike? how are they different?

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Find the number of moles of argon in 364g of argon.