What is an example of a physical change involving iron and a chemical change involving iron?

7. While prospecting in the North Woods, Joe found a gold nugget which had a density of 19.2 g/cm3. Joe dropped the gold into water in a graduated cylinder, the water level increased by 15.0 mL. How many grams of gold did he have? (Ans: 288 g)

Which properties are true of petroleum? Select all that apply. Petroleum is found in sedimentary rock. Petroleum was once living organisms. Petroleum is made from silicon based compounds. Petroleum is used to make plastics.

How do intermolecular forces determine the range of motion of particles in solids and liquids?

What would you do to change the volume of a gas

What are ions? a. atoms with equal numbers of protons and electrons b. electrically charged atoms c. neutral atoms d. small molecules with covalent bonds

How does planks constant work

What is true of the total mass of reactants compared to the total mass of proucts

An aqueous solution is 36% by mass silver nitrate, AgNO3, and has a density of 1.41 g/mL. What is the molality of silver nitrate in the solution?

Why Triethanolamine stearate is a polar molecule

What happens to iron oxide during decomposition