Answer:
sound loudness is measured in decibels, A. True
Answer:
A group of atoms bonded together by different chemical reactions. It is the smallest fundamental unit of a chemical compound.
Explanation:
When HCl is added to metal ions, metal chlorides are produced. In this problem, it is asked whether the given ions precipitate or not when added to HCl. According to the rule, all chlorides except Ag+, Pb 2+, Hg2 2+ are soluble. Hence the ion that would precipitate is only lead (II) ion.
B because inner core has metal and it’s solid