Which equation obeys the law of conservation of mass? a. 2fe + 3o2 → 2fe2o3 b. 4fe + o2 → 2fe2o3 c. fe + o2 → fe2o2 d. 4fe + 3o2 → 2fe2o3

D. remember the number of all the atoms of each molecule must stay the same. if 4 Fe is given the 4Fe must come out. you can know this because in the products side, there is a 2 after the Fe meaning that there are 2 Fe bonded together, with 3 O, the 2 before the Fe indicates that there are 2 of this specific molecule. which makes 4 Fe, meaning that we need 4 Fe for this equation to produce such a molecule. same thing for the Oxygen. there are 3 O in each of the 2 molecules in the products side meaning that we would need 6 O in the reactants side to make such an equation

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.

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.