LON-CAPA Exam Retake p x Pt Dynamic periodic Table xY Theoretical and percenty x

Question

LON-CAPA Exam Retake p x Pt Dynamic periodic Table xY Theoretical and percenty xYN ionization ener C https://access4.lon-capaillinois.edu/enc/97/c69e47bdb6ba54022a3c370b2440af2 Adarsh Singh v (Student section: FQ5) CHEM 102F Fall Main Menu contents Grades Course Contents Exam 2 Retake 10/26/14 11/02/14 Exam Retake Problem Given the following reaction (unbalanced): zn(s) HNO3 (aq) Zn(NO3)2 (aq) H2(g), what volume (in mL) of a 5.20 M HNO3 solution is needed to completely dissolve 52.4 g of zn (s). Submit Answer Incorrect. Tries 2/3 previous Tries

Explanation / Answer

The ballanced equation is

Zn + 2HNO3 = Zn(NO3)2 + H2

Molar mass of Zn is 65.5 g.

52.4 g Zn contains 52.4/65.5 mole = 0.8 mole.

1 mol Zn reacts with 2 moles of HNO3.

So, no of moles of HNO3 required is 2*0.8=1.6 mole.

Volume of 5.20(M) HNO3 is

1.6/5.2 L = 0.31 L= 310 mL

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