Select all the correct answers.
Properties of substances can be classified as physical or chemical properties. Which statements describe chemical properties?
A magnet is attracted to a piece of metal.

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.