Consider the following equilibrium: h2co3(aq) + h2o(l) h3o+(aq) + hco3-1(aq). what is the correct equilibrium expression? ka=[h3o+][hco1−3][h2co3] ka=[h3o+][h2co3][hco1−3] ka=[h2co3][h2o][h3o+][hco1−3] ka=[h3o+][hco1−3][h2co3][h2o]

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy