They are about 4.5 billion years old. Hope this helps.
Explanation:
The correct answer is C.
Through runoff on Earth's surface. Hope this helped!
Answer:
-OH
Explanation:
Alcohols generally have the structural formula OH
for example, ethanols structural formula is C2H5OH
First choice: PhH4 has a lower boiling point
Second: SiF4 higher
Third: CBr4 higher
