In the reaction mg(s) + 2hcl(aq) → h2(g) + mgcl2(aq), how many moles of hydrogen gas will be produced from 250.0 milliliters of a 3.0 m hcl in an excess of mg? 0.75 moles 0.38 moles 3.0 moles 1.5 moles

0.38 moles of hydrogen

Explanation: Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Thus

is a limiting reagent as it limits the formation of products and Mg is an excess reagent.

As 2 mole of gives= 1 mole of

0.75 moles of will give= of

increased stability in the completion of fluorine's outer shell.