Study the following two reactions. select all that apply. c(graphite) + o2(g) → co2(g) + 94.05 kcal c(diamond) + o2(g) → co2(g) + 94.50 kcal what could you infer from the information given above? the enthalpy of co2 is greater than the reactants. e2 - e1 is negative. graphite and diamond have equal enthalpy. diamond must have lower internal energy.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.