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Answer:
The answer is "0.74".
Explanation:
Moles of [tex]SnO_2 =0.74 \ mole[/tex]
[tex]\bold{Given \ equation:} \\\\ SnO_2+2H_2 \to Sn+2H_2O[/tex]
The balanced chemical reaction will include 1 mole of [tex]SnO_2[/tex] react to the given 1 mole of [tex]Sn \ so,\ 0.74[/tex] mole of [tex]SnO_2[/tex] react to give 0.74 moles of Sn, therefore its moles of tin metal will be 0.74 moles.