When is the principle of conservation of mass true? a. only for reactions that take place in open systems. b. only for reactions that take place in closed systems. c. for reactions that involve solids, but not gases. d. for reactions in both open and closed systems.

If i add water to oil what will happen

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

Calculate the molarity of each aqueous solution: a. 78.0 ml of 0.240 m naoh diluted to 0.250 l with water b. 38.5 ml of 1.2 m hno3 diluted to 0.130 l with water