Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas. the reactants in this reaction are

Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas. The reactants in this reaction are 1 molecule of Magnesium Mg and 2 molecules of Hydrochloric acid.

i.e.

A chemical reaction is a chemical process in which one or more elements or compounds combine together to react under some conditions (such as varying degrees of temperature and pressure) to produce different products.

In the given reaction, 1 molecule of Magnesium Mg and 2 molecules of Hydrochloric acid react together to produce 1 molecule of Magnesium chloride and 1 molecule of hydrogen gas.

i.e.

            Mg + 2 HCl → MgCl₂ + H₂

             Reactants         Products

Therefore, we can conclude that the reactants in this reaction are Magnesium and Hydrochloric acid.

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the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.