Determine if the highlighted element in the first compound of each reaction was oxidized or reduced. (a) mg(s) nicl2(aq) ⟶ mgcl2(aq) ni(s) (b) pcl3(l) cl2(g) ⟶ pcl5(s) (c) c2 h4(g) 3o2(g) ⟶ 2co2(g) 2h2 o(g) (d) zn(s) h2 so4(aq) ⟶ znso4(aq) h2(g) (e) 2k2 s2 o3(s) i2(s) ⟶ k2 s4 o6(s) 2ki(s) (f) 3cu(s) 8hno3(aq) ⟶ 3cu(no3)2(aq) 2no(g) 4h2 o(l)

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear