Answer:H2 + F2 → 2HF
Hydrogen react with fluorine to produce hydrogen fluoride.
D because as he walks away the radio will get louder
I *think* through weathering and erosion. Hope this helped
<span>10
The ph scale is defined as the negative power of 10 moles of hydrogen ions. A solution with 10^-7 mol/L of hydrogen ions is considered neutral. Lower ph numbers represent acids and higher ph numbers represent bases. For instance, something with a ph of 6 would have 10^-6 mol/L of hydrogen ions which is 10 times as many ions as 10^-7 mol/L.</span>
