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8 February, 03:53

Hydrazine (n2h4) is used as rocket fuels. it reacts with oxygen to form nitrogen and water. write the balanced equation for this reaction. n2h4 + o2 → n2 + 2h2o how many liters of n2 at stp form when 100g of n2h4 reaction with 100g of o2? how many grams of the excess reagent remain after the reaction?

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  1. 8 February, 04:19
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    Chemical reaction: N₂H₄ + O₂ → N₂ + 2H₂O.

    m (N₂H₄) = 100 g.

    n (N₂H₄) = m (N₂H₄) : M (N₂H₄).

    n (N₂H₄) = 100 g : 32 g/mol.

    n (N₂H₄) = 3,125 mol.

    m (O₂) = 100 g.

    n (O₂) = 100 g : 32 g/mol.

    n (O₂) = 3,125 mol.

    From chemical reaction n (O₂) = n (N₂).

    V (N₂) = n (N₂) · Vm.

    V (N₂) = 3,125 mol · 22,4 L/mol.

    V (N₂) = 70 L.

    There is not excess reagent.
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