Why should a chemical equation be balanced? A. to show the law of conservation of mass
B. to show metals from nonmetals
C. to show that the reactants are compounds
D. to show ionic compounds

Water is a highly important natural resource. which of these would be the best method to conserve water? a) drinking bottled water b) monitoring the ph of rivers c) treating and re-using wastewater d) testing nitrate levels in groundwater