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A 12.0 gm sample of magnesium is burnt i...

A 12.0 gm sample of magnesium is burnt in air to form magnesium oxide (MgO) and magnesium nitrides `(Mg_(3)N_(2)).` When the products are treated with water, 1.7 gm gaseous ammonia is generated. What is the mass (in gm) of `Mg(OH)_(2)` formed simultaneously.

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Knowledge Check

  • 24 gm pure sample of magnesium is burnt in air to form magnesium oxide and magnesium nitride. When products are treated with excess of H_(2)O , 3.4 gm of gaseous NH_(3) is generated according to given reactions. Mg+O_(2) rarr MgO Mg+N_(2)rarr Mg_(3)N_(2) Mg_(3)N_(2)+ 6H_(2)O rarr 2Mg(OH)_(2)+2NH_(3) Calculate the amount of magnesium oxide (in gm) in products.

    A
    28
    B
    20
    C
    16.8
    D
    32

  • 24 gm pure sample of magnesium is burnt in air to form magnesium oxide and magnesium nitride. When products are treated with excess of H_(2)O , 3.4 gm of gaseous NH_(3) is generated according to given reactions. Mg+O_(2) rarr MgO Mg+N_(2)rarr Mg_(3)N_(2) Mg_(3)N_(2)+ 6H_(2)O rarr 2Mg(OH)_(2)+2NH_(3) Calculate the amount of Mg(OH)_(2) (in gm) produced in above reaction.

    A
    11.6
    B
    17.4
    C
    23.2
    D
    15.8

  • When a certain amount of octane, C_8H_18 is burnt completely 7.04 gm CO_2 is fomed What is the weigh of H_2O formed, simultaneously ?

    A
    1.62 gm
    B
    6.48 gm
    C
    3.24 gm
    D
    2.28 gm

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    What happens when magnesium is burnt in air and the products X and Y are treated with water ?

    A sample of magnesium was burnt in air to give a mixture of MgO and Mg_(3)N_(2) . The ash was dissolved in 60 meq of HCl and the resulting solution back titrated with NaOH. 12 meq of NaOH were required to reach the end point. An excess of NaOH was then added and the solution distilled. The ammonia released was then trapped in 10 meq of second acid solution. Back titration of this solution required 6 meq of the base. Calculate the percentage of magnesium burnt to the nitride.

    A sample of Magnesium was burnt in air to give a mixture of MgO and Mg_(3) N_(2) .The ash was dissolved in 60 meq of HCl and the resulting solution back titrated with NaOH. 12 meq. of NaOH were required to react the end point. An excess of NaOH was then added and the solution distilled. The ammonia released was then trapped in 100meq of second acid soluiton. Back titration of this solution required 6 meq. of the base. Calculate the percentage of magnesium burnt to the nitride.

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