Mr. Rogers wanted to study the affect of different types of music would have on students ability to complete the IA. What is his dependent variable? What Is his independent variable ? A. classrooms
B. types of music
C. IA scores
D. students

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.