When dealing with a limiting reactant problem, if the coefficients of the reactants are the same, does that mean there are no limiting/excess reactants? For example when 15.3 moles of lead (II) chloride react with 44.9 moles magnesium bromide, the chemical equation is PbCl2 + MgBr2 → PbBr2 + MgCl2. Since the coefficients are 1 for all of reactants, will there be any limiting/excess reactants?

Compare and contrast physical changes with chemical changes.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

What is the effect of returning nuclear reactor cooling water back into bodies of water?