Write a balanced half-reaction for the reduction of gaseous oxygen (O2) to liquid water (H2O) in basic aqueous solution. Be sure to add physical state where appropriate.

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?