when a forensic analyst determines the chemical composition of a preparation that may contain illicit drugs such as heroin, cocaine, or barbiturates, this is an example of what?

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

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.