You didn't give an equation.
But starting with 1 mol NaCl you can get as much as 1 mol HCl so
mols NaCl = g/molar mass = 5.88/58.5 = 0.1
So 0.1 mol NaCl will produce 0.1 mol HCl.
Each mol of a gas @ STP will produce 22.4 L.
Post your work if you get stuck.
Calculate the volume of Hcl that can be obtained at s.t. p from 5.88g of sodium chloride
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