Salt water is classified as a (1) mixture, with fixed composition
(2) mixture, with variable composition
(3) compound, with fixed composition
(4) compound, with variable composition

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

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 )

Can someone me with these questions plz.