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What is the molar mass of potassium nitrate, kno3

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.