Balance the equations.
• Al + CUO →Al2O3 + Cu
•Fe2O3+ C → Fe + CO2
• SO2+O2+SO3

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from