3. Practice: Balance the following chemical equations. (These equations are not in the Gizmo.) A
1
Na +
NaCl
Cl2 →
H2O →
B.
Na +
NaOH +
H
C.
Mg +
O₂
Mgo
D.
KCIO, →
KCI +
O₂
E
Al +
CuO →
AlO +
Cu
F.
12 +
Nal +
Na, s,o,
Na $,03 →
P→
G.
Mg +
Mg P2

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

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.