Achemical equation is shown: na + h2o → naoh + h2 according to the law of conservation of mass, how many atoms of hydrogen exist in the products of this reaction? 2 3 4 6

4

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Thus in the reactants, there are 4 atoms of hydrogen , 2 atoms of oxygen and 2 atoms of sodium.Thus there will be 4 atoms of hydrogen, 2 atoms of oxygen and 2 atoms of sodium in the product as well.

Thus there will be 4 atoms of hydrogen exist in the products of this reaction.

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