Answer:
You are mostly correcet but im pretty sure that the nonmetals are brittle because they can break easily
Explanation:
You have already gotten the balanced equation. And the ratio of mol number of reactants and production is the ratio of coefficient. So there is 6.4/8*11=8.8 mol oxygen needed. The mass is 8.8*32=281.6 g.
Explanation:
It is the heat required to change a gram of substance from a liquid to a gas.
