What color flame did lead nitrate produce?
yellow-red
blue
green
purple

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.

How might this scientific phenomena be explained? a paper clip floats on water.

What is the number of neutrons in an atom with atomic mass of 35