Suppose 21.9 g of barium nitrate is dissolved in 300. mL of a 0.30 M aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution. You can assume the volume of the solution doesn't change when the barium nitrate is dissolved in it.
Round your answer to 3 significant digits.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

the answer is c.the valence of the atoms combine .

the correct answer would be b) volume versus temperature, because they are also directly proportional.