Answer:

[tex]NaCl + H_{2} SO_{4}[/tex] ⇒ [tex]NaHSO_{4} + HCl[/tex]

Let NaCl be x.

∴ By law of conservation of mass,

                  x + 4.900 ⇒ 6 + 1.825

                  x + 4.900 ⇒ 7.825

                  x = 7.825 - 4.900

                  x = 2.925

Weight of NaCl decomposed in the reaction = 2.925g

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