If 14 moles of HgO react how many moles of O2 will be produced

When light strikes a plane mirror, images form in locations where light does not actually reach. it only appears to the observer as though the light were coming from this position. what type of image is formed?

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?