How do you know that a combustion reaction is exothermic

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

List four observations that indicate that a chemical reaction may be taking place

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘