Mg metal reacts with HCl to produce hydrogen gas: Mg+2HCl -> MgCl2 + H2

How many grams of Mg are needed to prepare 5L of H2 at 735 mmHg and 18°C?

elements make up everything, and they combine to make compounds.

the answer is c

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.

answer7,570,82356 cubic centimeters;

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