Any change that results in the formation of a new chemical substance

Why are pipes bursting in the in extremely cold weather?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules