Yes layers of sediment form at the bottom of the ocean.
Chlorine.
Chlorine is the 17th element and has a mass of 35.
Put a 2 on the HCl.
2HCl+Ba-->BaCl2+H2
Answer:
A substance that is composed only of atoms having the same atomic number is ... 36 grams of an unknown liquid at its boiling point,.
1. B
2. C
3. A
That should do it
