Answer:
a.Archaeopteryx
b.Archaeopteryx had more in common with other small Mesozoic dinosaurs than with modern birds.Archaeopteryx was generally accepted by palaeontologists and popular reference books as the oldest known bird.Archaeopteryx could grow to about 0.5 m (1 ft 8 in) in length.
I hope it help
I think its the mass that changes but im not sure
it is either "aweak acid or a lousy (or very weak) acid"
To find moles in this sample, you would divide grams by molar mass of ethyl alcohol
(18.0g)/(46.07g/mol) = 0.391mol C2H6O
Answer:
Name the element: Beryllium
Number of shells: 4
Valence electrons: 2
Explanation: