Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of rust would be produced if 3 grams of reactants were consumed? A) 0 grams B) 1 gram C) 3 grams D) 7 grams

Answer: C) 3 grams

The law of conservation of mass state that the total mass of the reactant should be equal to the total mass of the product. In the reaction equation, iron and oxygen will be the reactant while rust will be the product.

Since rust is the only product, its mass should be equal to the mass of iron+oxygen. For 3 grams of reactants, there will be 3 grams of rust formed