my tutor gave me I dont understand how answer this

Question

How many moles of H2 can be produced from x grams of Mg in magnesium-aluminum alloy? The molar mass of Mg is 24.31 g mol−1.

Express your answer in terms of x to four decimal places (i.e., 0.5000x).

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Answer 1

To produce H2 from magnesium metal, you need to dissolve it with a mineral acid.

The basic equation is Mg(s) + 2H¹⁺ ====> Mg²⁺ + H2 So, one mole of Mg will product one mole of H2.

If there are x grams of Mg, then there are x / 24.31 moles of Magnesium reacting. The number of moles of H2 produced from this reaction is also x / 24.31 moles.

Aluminum can also produce H2, but the question only asked for H2 produced by Mg.