Marcia is given an incomplete chemical equation that includes the number of nitrogen atoms present in the products of the reaction. how can she conclude that the reaction started with three nitrogen atoms?

If the products contain 3 nitrogen atoms, then so did the reactants since overall mass is conserved in a chemical reaction.

Explanation:

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

multiply it by 5 in order for you to understand i cant give an exact answer.