Pls help. :) The boxes show five different substances, A, B, C, D and E.
O and represent atoms of different compounds.
(a) Which box contains a substance that is only one compound?
(b) Which box contains a substance that is a mixture of an element and a
compound?

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

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∘

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?