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How are isotopes of the same chemical element alike? how are they different?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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∘