I think the answer your looking for is B
Answer:
chongus because he's the only good one
Hardening steel and keeping it from rusting
Answer:
True
Explanation:
Hardness is defined as the ability of a substance to resist being scratched. It can be described using Moh's scale
From the given, we can note that the material with hardness 8 has more resistance to being scratched that a material with hardness 7.
This means that if these two substances came in contact, the more hard substance will scratch the less hard substance.
Hope this helps :)
CH4+2O2–>CO2+2H2O
4Fe+3O2–>2Fe2O3