Answer:
the changing tempure in rocks causing it to back apart
1) C
2) B
3) A/B not sure
4) C I think
It's called a compound because different elements are held together by a chemical bond.
Answer:
1 x 10^-12 mol dm^-3
Explanation:
[H+] = 10 ^ -pH
Therefore, pH 12 = 1 x 10^-12 hydrogen ion concentration
Pure substances are substances<span> that are made of only one type of atom or molecule....</span>