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Verified Answer :

Edufirst

1) Find the number of mols of HCl in 5.2 liters of 4.0M solution:

n = MV(L) = 4.0 mol/L 5.2 L = 20.8 mol

2) Find the number of mols of Mg that will react with 20.8 mol of HCl, using the coefficients of the balanced equation

[1mol Mg / 2 mol HCl] 20.8 mol HCl = 10.4 mol Mg

3) Transform mol to mass using the atomic mass:

10.4 mol Mg 24.3 g/mol = 252.7 g of Mg.

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